Feedback type pressure indicating device

Abstract

The invention relates to the field of pressure indication, in particular to a feedback type pressure indication device which comprises a base, a piston rod is arranged in the base in a sliding mode, and the piston rod is sleeved with a spring. One end of the base is fixedly connected with a plug, and a displacement sensor used for monitoring displacement of the piston rod is arranged on one side of the plug. An oil inlet end is arranged on one side of the base and located between the piston rod and the plug. The pressure sensor has the beneficial effects that the pressure can be judged according to whether the piston rod extends out of the base or not, a pressure signal can be output in real time by detecting the displacement of the piston rod through the displacement sensor, and follow-up automatic pressure adjustment and control are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of pressure indication, and in particular to a feedback type pressure indicating device. Background Art

[0002] In hydraulic systems, pressure is a crucial parameter. It is not only the source of power for all hydraulic actuators (such as hydraulic cylinders, hydraulic motors, etc.), but also the basis for precise control of most hydraulic control components (such as pressure valves, flow valves, etc.). The hydraulic system transmits energy and signals through the pressure energy of liquid (usually hydraulic oil) to achieve various mechanical actions and control functions. Therefore, accurate monitoring and feedback of the internal pressure of the hydraulic system is crucial to ensure the stable operation and efficient performance of the system.

[0003] Traditional pressure indicating devices, such as those that determine the pressure conditions inside the pressure system by observing the extension and retraction of the piston rod, can provide intuitive indication of pressure changes to a certain extent, but this indication method has obvious limitations. First, it relies on manual observation and cannot achieve real-time, continuous pressure monitoring. Second, this device cannot convert pressure signals into electrical signals or other signal forms that are easy to process and transmit, so it is impossible to directly feed back pressure information to the control unit of the hydraulic system to achieve automated pressure regulation and control.

[0004] Therefore, a feedback pressure indicating device is needed to overcome the above problems. Summary of the invention

[0005] In order to solve the above problems, an embodiment of the present invention provides a feedback pressure indicating device, which achieves the purpose of solving the problems raised in the background technology.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the present invention specifically adopts the following technical scheme: a feedback pressure indicating device, comprising a base, a piston rod is slidably arranged inside the base, and a spring is sleeved outside the piston rod;

[0007] A plug is fixedly connected to one end of the base, and a displacement sensor for detecting the displacement of the piston rod is provided on one side of the plug;

[0008] An oil inlet end is arranged on one side of the base, and the oil inlet end is located between the piston rod and the plug.

[0009] As a further improvement of the above technical solution:

[0010] A groove is formed at one end of the piston rod close to the plug.

[0011] One end of the piston rod is fixedly connected with a connecting rod.

[0012] A limiting groove is provided inside the plug, and the connecting rod is slidably arranged inside the limiting groove.

[0013] The spring is located at a side of the piston rod away from the plug.

[0014] The interior of the base is provided with a plurality of sealing rings 1 for use with the piston rod.

[0015] A sealing ring 2 is arranged on one side of the plug close to the inner wall of the base.

[0016] The beneficial effects of the embodiments of the present invention are:

[0017] In actual use, the oil inlet end is connected to the hydraulic system so that the pressure oil enters the interior of the base. When there is no pressure inside the hydraulic system, the piston rod is on the left side under the elastic force of the spring. When the internal pressure of the hydraulic system gradually increases, the liquid pressure overcomes the elastic force of the spring, causing the piston rod to move to the right, so that the piston rod can be extended from the interior of the base. The internal pressure state of the hydraulic system can be judged based on whether the piston rod is extended. At the same time, during the process of piston rod extension, the piston rod is away from the displacement sensor, and the displacement sensor can detect the displacement of the piston rod, thereby outputting a pressure signal in real time based on the displacement signal. That is, in the present application, the pressure can be judged by whether the piston rod extends out of the base, and the displacement sensor can detect the displacement of the piston rod to output a pressure signal in real time, which is convenient for subsequent automated pressure regulation and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional schematic diagram of the present invention;

[0019] Figure 2 It is a cross-sectional schematic diagram of the piston rod after movement of the present invention.

[0020] In the figure: 1. base; 2. piston rod; 3. spring; 4. plug; 5. displacement sensor; 6. oil inlet end; 7. groove; 8. connecting rod; 9. limit groove; 10. sealing ring 1; 11. sealing ring 2. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0022] See also Figure 1 to Figure 2 The embodiment of the present invention discloses a feedback pressure indicating device, comprising a base 1, a piston rod 2 is slidably arranged inside the base 1, and a spring 3 is sleeved outside the piston rod 2;

[0023] A plug 4 is fixedly connected to one end of the base 1, and a displacement sensor 5 for detecting the displacement of the piston rod 2 is provided on one side of the plug 4;

[0024] An oil inlet end 6 is provided on one side of the base 1, and the oil inlet end 6 is located between the piston rod 2 and the plug 4;

[0025] In actual use, the oil inlet end 6 is connected to the hydraulic system so that the pressure oil enters the interior of the base 1. When there is no pressure inside the hydraulic system, the piston rod 2 is on the left side under the elastic force of the spring 3. When the pressure inside the hydraulic system gradually increases, the liquid pressure overcomes the elastic force of the spring 3, so that the piston rod 2 moves to the right, and the piston rod 2 is extended from the interior of the base 1. The internal pressure state of the hydraulic system can be judged according to whether the piston rod 2 is extended; at the same time, during the extension process of the piston rod 2, the piston rod 2 is away from the displacement sensor 5, and the displacement sensor 5 can detect the displacement of the piston rod 2, thereby outputting a pressure signal in real time according to the displacement signal;

[0026] That is, in the present application, the pressure can be determined by whether the piston rod 2 extends out of the base 1, and the displacement of the piston rod 2 can be detected by the displacement sensor 5 to output a pressure signal in real time, so as to facilitate the subsequent automated pressure regulation and control.

[0027] In order to make it easier to observe whether the piston rod 2 extends out of the base 1, red paint can be applied to the end of the piston rod 2 to make the piston rod 2 more eye-catching; at the same time, a scale line can be set at the end of the piston rod 2 to facilitate observation of the extended length of the piston rod 2.

[0028] The displacement sensor 5 may be a strain displacement sensor, a magnetostrictive displacement sensor, an optical displacement sensor or an ultrasonic displacement sensor.

[0029] As a further illustration of this application:

[0030] A groove 7 is provided at one end of the piston rod 2 close to the plug 4. The groove 7 facilitates the pressure oil to enter between the piston rod 2 and the plug 4, thereby facilitating the piston rod 2 to move.

[0031] As a further illustration of this application:

[0032] One end of the piston rod 2 is fixedly connected to a connecting rod 8;

[0033] In actual use, the displacement sensor 5 detects the displacement of the connecting rod 8 to reflect the displacement of the piston rod 2 .

[0034] As a further illustration of this application:

[0035] A limiting groove 9 is provided inside the plug 4, and a connecting rod 8 is slidably arranged inside the limiting groove 9;

[0036] The movement stability of the piston rod 2 is enhanced by the connecting rod 8 moving inside the limiting groove 9 .

[0037] As a further illustration of this application:

[0038] The spring 3 is located on the side of the piston rod 2 away from the plug 4, so that the spring 3 does not come into direct contact with the pressure oil, thereby preventing the oil pressure of the pressure oil from affecting the normal compression of the spring 3.

[0039] As a further illustration of this application:

[0040] The interior of the base 1 is provided with a plurality of sealing rings 10 for use with the piston rod 2. The plurality of sealing rings 10 are used to improve the sealing performance of the piston rod 2 inside the base 1 to prevent leakage of pressure oil.

[0041] As a further illustration of this application:

[0042] A sealing ring 11 is provided on one side of the plug 4 close to the inner wall of the base 1 and on one side of the plug 4 close to the connecting rod 8 to ensure the sealing of the plug 4 inside the base 1 and the sealing of the connecting rod 8 inside the plug 4.

[0043] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting 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.

[0044] In addition, it should be noted that in the description of the present invention, 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 those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0046] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A feedback pressure indicating device, characterized in that: It comprises a base (1), a piston rod (2) is slidably arranged inside the base (1), and a spring (3) is sleeved outside the piston rod (2); A plug (4) is fixedly connected to one end of the base (1), and a displacement sensor (5) for detecting the displacement of the piston rod (2) is provided on one side of the plug (4); An oil inlet end (6) is provided on one side of the base (1), and the oil inlet end (6) is located between the piston rod (2) and the plug (4).

2. The feedback pressure indicating device according to claim 1, characterized in that: A groove (7) is formed at one end of the piston rod (2) close to the plug (4).

3. The feedback pressure indicating device according to claim 1, characterized in that: One end of the piston rod (2) is fixedly connected to a connecting rod (8).

4. The feedback pressure indicating device according to claim 3, characterized in that: A limiting groove (9) is provided inside the plug (4), and the connecting rod (8) is slidably arranged inside the limiting groove (9).

5. The feedback pressure indicating device according to claim 1, characterized in that: The spring (3) is located on a side of the piston rod (2) away from the plug (4).

6. The feedback pressure indicating device according to claim 1, characterized in that: A plurality of sealing rings (10) for use with the piston rod (2) are arranged inside the base (1).

7. The feedback pressure indicating device according to claim 1, characterized in that: A sealing ring 2 (11) is provided on one side of the plug (4) close to the inner wall of the base (1).

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