A hydraulic valve core displacement detection device

Abstract

This utility model discloses a hydraulic valve core displacement detection device, including a hydraulic valve and a valve core displacement sensor. The valve core displacement sensor is located on the left side of the hydraulic valve, and a connecting block is fixed to the left side of the hydraulic valve, positioned between the hydraulic valve and the valve core displacement sensor. The connecting block has a convex shape, and a threaded sleeve is fixed to its outer wall. A collar is threadedly connected to the outer wall of the threaded sleeve. A pressing component is located on the left side of the collar. An annular groove is formed on the left outer wall of the connecting block, and a sealing strip is inserted into the groove. The collaborative operation of the pressing component and the sealing strip effectively ensures the sealing performance of the connection. With the precise threaded engagement between the collar and the threaded sleeve, the collar can achieve precise axial movement. The operator only needs to easily rotate the auxiliary pull rod to drive the collar to rotate smoothly on the threaded sleeve, thereby achieving the axial displacement of the collar.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic valve core displacement detection technology, specifically a hydraulic valve core displacement detection device. Background Technology

[0002] In hydraulic systems, hydraulic valves are the core components that control the direction, pressure, and flow rate of hydraulic fluid. Their working state directly affects the performance and stability of the entire system. As a key component of hydraulic valves, the accurate detection of valve core displacement plays a crucial role in the normal operation of the hydraulic system. By accurately monitoring valve core displacement, the control system can grasp the working status of the hydraulic valve in real time, adjust the hydraulic system parameters in a timely manner according to actual needs, achieve precise control of fluid flow, ensure stable system operation, avoid system failures caused by abnormal valve core displacement, and guarantee production safety and equipment reliability.

[0003] Currently, in hydraulic systems, the connection and sealing methods between valve core displacement sensors and hydraulic valves are mainly simple sealing ring connections and threaded connections. Sealing ring connections are a more common method, usually by installing O-rings, Y-rings, or other sealing rings at the connection point. The elastic deformation of the sealing rings fills the gaps to achieve a seal. Threaded connections, on the other hand, tighten the sensor and hydraulic valve with threads, relying on the tight fit of the threads and the sealant between the threads to prevent leakage.

[0004] However, in practical applications, these traditional sealing methods have revealed many problems. When using sealing rings for connection, the sealing rings are prone to aging, deformation, and wear due to long-term immersion in hydraulic oil and changes in pressure and temperature, resulting in a decline in sealing performance. Once the sealing rings age and harden, their elasticity weakens, and they cannot tightly fit the gaps in the connection parts, causing hydraulic oil to leak out from these gaps. Although threaded connections seem simple and reliable, during the long-term operation of the hydraulic system, they are subject to external forces such as vibration and impact, which can easily loosen the threads, damaging the sealing effect of the sealant and also causing hydraulic oil leakage problems. Utility Model Content

[0005] The purpose of this invention is to provide a hydraulic valve core displacement detection device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic valve core displacement detection device, comprising a hydraulic valve and a valve core displacement sensor, wherein the valve core displacement sensor is disposed on the left side of the hydraulic valve, and a connecting block is fixed on the left side of the hydraulic valve, the connecting block being located between the hydraulic valve and the valve core displacement sensor, the connecting block having a convex shape, and a threaded sleeve being fixed to the outer wall of the connecting block, a collar being threadedly connected to the outer wall of the threaded sleeve, a compression assembly being disposed on the left side of the collar, and an annular groove being formed on the left outer wall of the connecting block, wherein a sealing strip is inserted into the inside of the groove.

[0007] Preferably, auxiliary pull rods are fixed on both sides of the outer wall of the collar to drive the collar to rotate.

[0008] Preferably, a through hole is provided at the center of the connecting block, and the sensing head of the valve core displacement sensor extends through the connecting block into the hydraulic valve and connects with the valve core.

[0009] Preferably, the extrusion assembly includes a transmission push rod, which is slidably connected inside the collar, and a circular top plate is fixed to the left side of the transmission push rod.

[0010] Preferably, the transmission push rod consists of two metal rods of different thicknesses, with the thinner rod located to the left of the thicker rod, extending to the left into the interior of the annular groove of the connecting block and connecting with the circular top plate.

[0011] Preferably, the collar has a circular groove inside, and a limiting block is provided inside the circular groove, the limiting block being connected to the transmission push rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are: The connecting block serves as a crucial bridge connecting the hydraulic valve and the valve core displacement sensor. One end is tightly fixed to the hydraulic valve, while the other end is precisely connected to the valve core displacement sensor, achieving a stable connection between the two. This stable connection effectively ensures the stability of the overall structure of the device and lays a solid foundation for the reliable conduct of testing. When the collar moves axially, the compression assembly begins to play a crucial role. Under the push of the collar, the transmission push rod slides stably along the circular groove inside the collar, accurately transmitting the axial force of the collar to the circular top plate. The circular top plate directly contacts the sealing strip, evenly applying the axial force transmitted by the transmission push rod to the sealing strip. After being compressed, the sealing strip undergoes elastic deformation, tightly fitting between the inner wall of the annular groove of the connecting block and the outer wall of the valve core displacement sensor, thus forming a highly efficient sealing barrier between the connecting block and the valve core displacement sensor. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Detailed view of the connection structure in cross-section; Figure 3 for Figure 2 Enlarged detail of the connection structure of the extrusion assembly; Figure 4 for Figure 2 Detailed view of the connection structure on the left side of the middle connecting block; Figure 5 for Figure 2 Detailed view of the connection structure on the right side of the middle connecting block.

[0014] Explanation of reference numerals in the attached drawings: 1. Hydraulic valve, 2. Connecting block, 3. Valve core displacement sensor, 4. Threaded sleeve, 5. Collar, 6. Auxiliary tie rod, 7. Transmission push rod, 8. Circular top plate, 9. Sealing strip. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-5 This utility model provides a technical solution for a hydraulic valve core displacement detection device: A hydraulic valve core displacement detection device includes a hydraulic valve 1 and a valve core displacement sensor 3. The valve core displacement sensor 3 is located on the left side of the hydraulic valve 1. The core displacement sensor 3's core function is to detect the displacement of the valve core inside the hydraulic valve in real time and accurately, and convert the displacement signal into an electrical signal for transmission to the control system. By detecting the valve core displacement, the control system can monitor the working status of the hydraulic valve in real time and determine whether the hydraulic system is operating normally. A connecting block 2 is fixed on the left side of the hydraulic valve 1. The connecting block 2 mainly serves as a bridge connecting the hydraulic valve 1 and the valve core displacement sensor 3. To achieve a stable connection between the two and ensure the overall structural stability of the device, the connecting block 2 is located between the hydraulic valve 1 and the valve core displacement sensor 3. The connecting block 2 is shaped like a convex character, and a threaded sleeve 4 is fixed to the outer wall of the connecting block 2. The threaded sleeve 4 serves as the mounting base for the collar 5. The threaded sleeve 4 engages with the collar 5 through the precision threads on its outer wall, providing precise guidance for the rotation and axial movement of the collar 5. The collar 5 is threadedly connected to the outer wall of the threaded sleeve 4. The collar 5 moves axially under the drive of the auxiliary pull rod 6 through the threaded engagement with the threaded sleeve 4, thereby pushing the extrusion assembly to extrude the sealing strip 9 to achieve a sealing effect. The collar 5 provides an installation carrier and motion guide for the extrusion assembly, ensuring that the extrusion assembly can stably and accurately apply pressure to the sealing strip 9, guaranteeing the sealing performance between the connecting block 2 and the valve core displacement sensor 3, preventing hydraulic oil leakage, and avoiding impurities from entering the hydraulic valve and affecting the normal movement of the valve core and the accuracy of displacement detection. The extrusion assembly is located on the left side of the collar 5, and an annular groove is opened on the outer left side of the connecting block 2, with the sealing strip 9 inserted inside the groove. The core function of the sealing strip 9 is to achieve a seal between the connecting block 2 and the valve core displacement sensor 3, preventing hydraulic oil inside the hydraulic valve from leaking through the gap between the two, avoiding a drop in hydraulic system pressure, and affecting the normal operation of the system.

[0017] Auxiliary pull rods 6 are fixed on both sides of the outer wall of the collar 5 to drive the collar 5 to rotate. A through hole is opened at the center of the connecting block 2, and the sensing head of the valve core displacement sensor 3 extends through the connecting block 2 to the inside of the hydraulic valve 1 and connects with the valve core. The auxiliary pull rod 6 provides the operator with a convenient force application component. By holding the handle of the auxiliary pull rod 6 and turning it, the collar 5 can be easily driven to rotate on the threaded sleeve 4, thereby realizing the axial movement of the collar 5.

[0018] The extrusion assembly includes a transmission push rod 7, which is slidably connected inside the collar 5. As the power transmission component of the extrusion assembly, the transmission push rod 7 can smoothly slide along the circular groove inside the collar 5 under the axial movement of the collar 5, transmitting the axial force of the collar 5 to the circular top plate 8, thereby pushing the circular top plate 8 to extrude the sealing strip 9. The circular top plate 8 is fixed to the left side of the transmission push rod 7, and the circular top plate 8 directly contacts the sealing strip 9, uniformly applying the axial force transmitted by the transmission push rod 7 to the sealing strip 9, causing the sealing strip 9 to undergo elastic deformation and tightly fit between the inner wall of the annular groove of the connecting block 2 and the outer wall of the valve core displacement sensor 3, thereby achieving a seal between the connecting block 2 and the valve core displacement sensor 3. The transmission push rod 7 consists of two metal rods of different thicknesses, with the thinner rod located to the left of the thicker rod. The thinner rod extends to the left into the annular groove of the connecting block 2 and connects with the circular top plate 8. The collar 5 has a circular groove inside, and a limit block is set inside the circular groove. The limit block is connected to the transmission push rod 7.

[0019] Working principle: When using a hydraulic valve core displacement detection device, the user inserts the sealing strip 9 into the annular groove on the left side of the connecting block 2, then inserts the sensing head of the valve core displacement sensor 3 into the center of the connecting block 2 and moves it to the left. When the valve core displacement sensor 3 is fully in contact with the connecting block 2, it is fixed to the connecting block 2 with bolts. Then, the sensing head is connected to the valve core of the hydraulic valve 1. The operator then holds the auxiliary pull rod 6 and rotates it, causing the collar 5 to rotate along the precision thread of the threaded sleeve 4, thereby realizing the axial (leftward) movement of the collar 5. During the movement of the collar, the internal transmission push rod 7 is pushed by the collar along the circular groove. The smooth sliding motion transmits axial force to the circular top plate 8 on the left. The circular top plate directly presses against the sealing strip 9, which is pre-installed in the annular groove. This causes the sealing strip 9 to undergo elastic deformation, tightly fitting against the inner wall of the connecting block groove and the outer wall of the valve core displacement sensor, ultimately achieving a seal between the two. After sealing, this effectively prevents hydraulic oil leakage inside the hydraulic valve 1, avoiding a drop in system pressure. At the same time, it prevents external impurities from entering, ensuring the normal movement of the valve core. The valve core displacement sensor, through direct connection with the valve core, can detect the valve core displacement in real time and accurately, and convert the displacement signal into an electrical signal for transmission to the control system, allowing the system to determine the operating status of the hydraulic system.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic valve spool displacement detection device comprising a hydraulic valve (1) and a spool displacement sensor (3), the left side of the hydraulic valve (1) is provided with a spool displacement sensor (3), characterized in that, A connecting block (2) is fixed on the left side of the hydraulic valve (1). The connecting block (2) is located between the hydraulic valve (1) and the valve core displacement sensor (3). The connecting block (2) is convex in shape. A threaded sleeve (4) is fixed on the outer wall of the connecting block (2). A collar (5) is threaded on the outer wall of the threaded sleeve (4). A compression assembly is provided on the left side of the collar (5). An annular groove is opened on the left outer wall of the connecting block (2), and a sealing strip (9) is inserted into the groove.

2. The hydraulic valve spool displacement detection apparatus according to claim 1, wherein Auxiliary pull rods (6) are fixed on both sides of the outer wall of the collar (5) to drive the collar (5) to rotate.

3. The hydraulic valve spool displacement detection apparatus of claim 1, wherein The connecting block (2) has a through hole at its center, and the sensing head of the valve core displacement sensor (3) extends through the connecting block (2) into the hydraulic valve (1) and connects with the valve core.

4. The hydraulic valve spool displacement detection apparatus of claim 1, wherein The extrusion assembly includes a transmission push rod (7), which is slidably connected inside the collar (5), and a circular top plate (8) is fixed on the left side of the transmission push rod (7).

5. The hydraulic valve spool displacement detection apparatus of claim 4, wherein The transmission push rod (7) consists of two metal rods of different thicknesses. The thinner rod is located to the left of the thicker rod and extends to the left into the annular groove of the connecting block (2) to connect with the circular top plate (8).

6. A hydraulic valve spool displacement detection device according to claim 5, wherein The collar (5) has a circular groove inside, and a limit block is provided inside the circular groove. The limit block is connected to the transmission push rod (7).

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