Displacement detection device for valve core of two-way cartridge valve of hydraulic pump station of hoist and lock machine

Abstract

This utility model provides a displacement detection device for a two-way cartridge valve core in a hydraulic pump station for a gate hoist. It includes a two-way cartridge valve control cover plate, with a two-way cartridge valve core located at the lower part of the control cover plate. A through hole is machined inside the control cover plate and directly above the valve core. A spring-loaded linear displacement sensor is fixedly installed at the through hole. The end of the rod-shaped iron core of the spring-loaded linear displacement sensor extends into the central hole of the valve core. The central hole and the through hole are coaxially arranged. This displacement detection device incorporates a spring-loaded linear displacement sensor into the existing two-way cartridge valve structure, enabling the detection of real-time valve core displacement without adversely affecting the overall valve performance, thus providing data for fault diagnosis in the hydraulic system.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic component performance testing technology, specifically to a device for detecting the displacement of the valve core of a two-way cartridge valve in a gate hoist hydraulic pump station. Background Technology

[0002] Most existing two-way cartridge valves do not have valve core displacement monitoring function or only have valve core position switching quantity detection function. Therefore, the existing two-way cartridge valves on the market do not have valve core opening degree detection function.

[0003] Traditional two-way cartridge valves typically lack spool position detection functionality. Their relatively simple structure makes it difficult to detect spool position, hindering the diagnosis of hydraulic system malfunctions. Alternatively, two-way cartridge valves with spool on / off detection can only detect spool movement, not displacement. Spool displacement determines valve opening, directly impacting flow rate, pressure, and response speed. Therefore, appropriate detection devices are needed to detect spool displacement in two-way cartridge valves to meet performance requirements. Utility Model Content

[0004] The purpose of this utility model is to provide a valve core displacement detection device for a two-way cartridge valve in a hydraulic pump station for a gate hoist. This displacement detection device is based on the existing two-way cartridge valve structure and is equipped with a spring-loaded linear displacement sensor to detect the real-time displacement of the valve core without adversely affecting the performance of the entire valve, thereby providing data for fault diagnosis of the hydraulic system.

[0005] To achieve the above-mentioned technical features, the purpose of this utility model is as follows: a displacement detection device for a two-way cartridge valve core of a gate hoist hydraulic pump station, including a two-way cartridge valve control cover plate, a two-way cartridge valve core is provided at the lower part of the two-way cartridge valve control cover plate, a through hole is machined inside the two-way cartridge valve control cover plate and directly above the two-way cartridge valve core, a spring-loaded linear displacement sensor is fixedly installed at the position of the through hole, the end of the rod-shaped iron core of the spring-loaded linear displacement sensor extends into the central hole of the two-way cartridge valve core, and the central hole and the through hole are arranged coaxially.

[0006] Preferably, a shuttle valve is installed inside the control cover of the two-way cartridge valve.

[0007] Preferably, an electromagnetic directional valve is installed on the side of the two-way cartridge valve control cover.

[0008] Preferably, the end of the through hole is provided with a stepped threaded hole, and the threaded post of the spring-loaded linear displacement sensor is threadedly connected to the stepped threaded hole, and a locking nut is fixed on the threaded post.

[0009] Preferably, the spring-loaded linear displacement sensor employs a spring-loaded linear variable differential transformer.

[0010] Preferably, the two-way cartridge valve control cover is used to install a directional slide valve.

[0011] Preferably, the spring-loaded linear displacement sensor is a magnetostrictive sensor or a fiber optic grating sensor.

[0012] Preferably, the end of the rod-shaped iron core is in contact with the end of the center hole of the two-way cartridge valve core, and can move with the displacement of the two-way cartridge valve core.

[0013] Preferably, the spring-loaded linear displacement sensor is connected to the hydraulic system controller via a signal line, and the spring-loaded linear displacement sensor sends signals to provide real-time feedback on the position information of the two-way cartridge valve core.

[0014] Preferably, the two-way cartridge valve control cover is an LAF32GWB series cover.

[0015] The present invention has the following beneficial effects:

[0016] 1. This utility model features a spring-loaded linear displacement sensor on the cover plate of a two-way cartridge valve, which can monitor the opening degree of the hydraulic valve in real time while maintaining the function and performance of the hydraulic components, and is used for fault diagnosis of the hydraulic system.

[0017] 2. This utility model uses an LVDT linear variable differential transformer to detect the real-time displacement of the valve core without adversely affecting the performance of the entire valve. The LVDT displacement sensor has the advantages of high accuracy and strong anti-interference, and is well-suited for the precise measurement of the small displacement of the valve core. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a diagram of the installation structure of this utility model.

[0020] Figure 2 This is a diagram of the existing LAF32GWB series cover plate.

[0021] In the diagram: 1. Spring-loaded linear displacement sensor; 2. Two-way cartridge valve control cover; 3. Two-way cartridge valve core; 4. Solenoid directional valve; 5. Shuttle valve; 6. Center hole; 7. Through hole; 8. Stepped threaded hole; 9. Locking nut; 10. Rod-shaped iron core. Detailed Implementation

[0022] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0023] Example 1:

[0024] Reference Figure 1 A displacement detection device for a two-way cartridge valve core in a gate hoist hydraulic pump station includes a two-way cartridge valve control cover plate 2. A two-way cartridge valve core 3 is located at the lower part of the control cover plate 2. A through hole 7 is machined inside the control cover plate 2 and directly above the valve core 3. A spring-loaded linear displacement sensor 1 is fixedly installed at the through hole 7. The end of the rod-shaped iron core 10 of the spring-loaded linear displacement sensor 1 extends into the central hole 6 of the valve core 3. The central hole 6 and the through hole 7 are coaxially arranged. This displacement detection device incorporates a spring-loaded linear displacement sensor 1 into the existing two-way cartridge valve structure to detect the real-time displacement of the valve core without adversely affecting the overall valve performance. During operation, as the valve core 3 displaces, the spring-loaded linear displacement sensor 1 is simultaneously activated, thereby detecting the position of the valve core 3 in real time to achieve valve opening detection.

[0025] Furthermore, a shuttle valve 5 is installed inside the two-way cartridge valve control cover plate 2. The shuttle valve 5 facilitates the hydraulic system's oil circuit control function.

[0026] Furthermore, a solenoid directional valve 4 is installed on the side of the two-way cartridge valve control cover plate 2. The solenoid directional valve 4 facilitates the hydraulic system's oil circuit reversing control function.

[0027] Furthermore, a stepped threaded hole 8 is provided at the end of the through hole 7. The threaded post of the spring-loaded linear displacement sensor 1 is threadedly connected to the stepped threaded hole 8, and a locking nut 9 is fixed on the threaded post. Through the above-mentioned specific installation structure of the stepped threaded hole 8, it is easy to achieve reliable positioning and installation of the spring-loaded linear displacement sensor 1, and the locking nut 9 facilitates its reliable locking and fixing.

[0028] Furthermore, the spring-loaded linear displacement sensor 1 employs a spring-loaded linear variable differential transformer. The DC spring-loaded LVDT boasts excellent performance, utilizing a convenient single 9-28V DC power supply. The product's measuring contact probe is made of wear-resistant chrome-plated hard tool steel, with a maximum measuring range of 50mm and a maximum spring force of 200 grams. The electronic circuitry is sealed within a 304 stainless steel metal tube, allowing it to operate in harsh environments such as humidity and dust. The output signal is a standard 0-5V or 4-20mA output usable by computers or PLCs.

[0029] Furthermore, the two-way cartridge valve control cover 2 is used to install a directional spool valve. The aforementioned two-way cartridge valve control cover 2 enhances adaptability.

[0030] Furthermore, the spring-loaded linear displacement sensor 1 employs a magnetostrictive sensor or a fiber optic grating sensor. Adaptability is enhanced by using different types of spring-loaded linear displacement sensors 1.

[0031] Furthermore, the end of the rod-shaped iron core 10 contacts and engages with the end inside the central hole 6 of the two-way cartridge valve core 3, and can move along with the displacement of the two-way cartridge valve core 3. Through the above operation process, real-time detection of the position signal of the two-way cartridge valve core 3 is achieved.

[0032] Furthermore, the spring-loaded linear displacement sensor 1 is connected to the hydraulic system controller via a signal line, and sends signals from the spring-loaded linear displacement sensor 1 to provide real-time feedback on the position information of the two-way cartridge valve core 3. This system connection facilitates automatic signal transmission and subsequent automatic control.

[0033] Furthermore, the two-way cartridge valve control cover 2 is a LAF32GWB series cover. This series of cover enhances adaptability.

[0034] The working process and principle of this utility model:

[0035] like Figure 1 As shown, taking the LAF32GWB series cover plate used for installing directional spool valves as an example, this paper demonstrates a two-way cartridge valve structure with valve core displacement detection. The structure includes a two-way cartridge valve control cover plate 2, a spring-loaded LVDT linear variable differential transformer mounted on the control cover plate 2, and a spring-loaded LVDT sensor valve core in contact with the bottom of the two-way cartridge valve core 3. The spring-loaded LVDT linear variable differential transformer serves as the valve core displacement sensor. Compared to the traditional LAF32GWB series cover plate, this solution optimizes the cover plate structure without altering the function and performance of the hydraulic components, enabling the detection of the two-way cartridge valve core position.

[0036] This example demonstrates a two-way cartridge valve with valve core displacement monitoring. A spring-loaded LVDT (Low-Voltage Variable Transformer) is installed on the valve cover. The valve core of the spring-loaded LVDT contacts the bottom of the two-way cartridge valve. When oil enters port A of the two-way cartridge valve, the valve core moves upward, causing the valve core of the spring-loaded LVDT to move upward synchronously. At this time, the spring-loaded LVDT sends a signal to provide real-time feedback on the valve core position. When oil enters port B of the two-way cartridge valve, the valve core moves downward. Since there is no position limiter on the valve core, the spring-loaded LVDT automatically springs back to its initial position, thus realizing the valve core position monitoring function.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A valve core displacement detection device for a two-way cartridge valve in a gate hoist hydraulic pump station, characterized in that, The device includes a two-way cartridge valve control cover plate (2), and a two-way cartridge valve core (3) is provided at the lower part of the two-way cartridge valve control cover plate (2). A through hole (7) is machined inside the two-way cartridge valve control cover plate (2) and directly above the two-way cartridge valve core (3). A spring-loaded linear displacement sensor (1) is fixedly installed at the location of the through hole (7). The end of the rod-shaped iron core (10) of the spring-loaded linear displacement sensor (1) extends into the center hole (6) of the two-way cartridge valve core (3). The center hole (6) and the through hole (7) are arranged coaxially.

2. The valve core displacement detection device for the two-way cartridge valve of the hoist hydraulic pump station according to claim 1, characterized in that: A shuttle valve (5) is installed inside the two-way cartridge valve control cover plate (2).

3. The valve core displacement detection device for the two-way cartridge valve of the hoist hydraulic pump station according to claim 1, characterized in that: A solenoid directional valve (4) is installed on the side of the two-way cartridge valve control cover plate (2).

4. The valve core displacement detection device for the two-way cartridge valve of the hoist hydraulic pump station according to claim 1, characterized in that: The end of the through hole (7) is provided with a stepped threaded hole (8), and the threaded post of the spring-loaded linear displacement sensor (1) is connected to the stepped threaded hole (8) by a threaded connection. A locking nut (9) is fixed on the threaded post.

5. The valve core displacement detection device for the two-way cartridge valve of the hoist hydraulic pump station according to claim 1, characterized in that: The spring-loaded linear displacement sensor (1) adopts a spring-loaded linear variable differential transformer.

6. The valve core displacement detection device for the two-way cartridge valve of the hoist hydraulic pump station according to claim 1, characterized in that: The two-way cartridge valve control cover (2) is used to install the directional slide valve.

7. The valve core displacement detection device for the two-way cartridge valve of the hoist hydraulic pump station according to claim 1, characterized in that: The spring-loaded linear displacement sensor (1) uses a magnetostrictive sensor or a fiber optic grating sensor.

8. The valve core displacement detection device for the two-way cartridge valve of the hoist hydraulic pump station according to claim 1, characterized in that: The end of the rod-shaped iron core (10) is in contact with the end of the center hole (6) of the two-way cartridge valve core (3) and can move with the displacement of the two-way cartridge valve core (3).

9. The valve core displacement detection device for the two-way cartridge valve of the hoist hydraulic pump station according to claim 8, characterized in that: The spring-loaded linear displacement sensor (1) is connected to the hydraulic system controller via a signal line, and sends a signal through the spring-loaded linear displacement sensor (1) to provide real-time feedback on the position information of the two-way cartridge valve core (3).

10. The valve core displacement detection device for the two-way cartridge valve of the hoist hydraulic pump station according to claim 8, characterized in that: The two-way cartridge valve control cover (2) is a LAF32GWB series cover.

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