Valve device capable of monitoring flow state
By incorporating fluid pressure and differential pressure sensors, as well as push rod mechanisms and push button switches into the valve assembly, the opening and closing status of the valve components can be rapidly monitored, solving the problem of slow response speed in existing technologies and achieving precise control of high-speed systems.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-03-31
AI Technical Summary
Existing flow sensing devices have a slow response speed, especially when switching from a fluid-containing state to a fluid-free state, which cannot meet the needs of high-speed control scenarios, leading to system control errors and safety hazards.
Fluid pressure sensors and differential pressure sensors are used to monitor the pressure or differential pressure changes at the inlet and outlet of the valve components. Combined with a push rod mechanism and push button switch, the opening and closing status of the valve components can be quickly sensed through electrical detection.
It enables rapid response of valve devices, can efficiently and accurately monitor flow status, is suitable for high-speed system control, and reduces control errors and safety risks.
Smart Images
Figure CN224064623U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of fluid pipeline monitoring technology, especially a valve device capable of flow state monitoring. BACKGROUND
[0002] The perception of fluid state in hydraulic system and pipeline is an important signal parameter for control system, and is the prerequisite for safe operation and accurate control of equipment. For example, in the cooling water circuit of electric furnace, the cooling water flow signal is the key to determine whether the cooling system is running normally. The absence of flow signal during the operation of cooling pump indicates that the cooling system may have abnormalities. For hydraulic systems, the hydraulic pump piston generally makes reciprocating motion. In situations where it is not convenient to install limit switches (such as compact devices such as some small oil cylinders or hydraulic tightening wrenches), quickly and reliably determining whether the oil cylinder piston has reached the limit position is the prerequisite for realizing automatic control of equipment and ensuring safety. The flow monitoring can determine whether the piston has reached the limit position.
[0003] However, the existing flow monitoring switch has a long response time (the response time from the presence of flow to the absence of flow is more than 500 ms). For hydraulic wrenches, this period of time may cause the system pressure to exceed 50 MPa. The delay of the system flow control signal may cause the absence of flow to be judged as the presence of flow, resulting in unacceptable control errors, and cannot meet the needs of hydraulic systems that require high-speed response.
[0004] In summary, the current problem is that:
[0005] Most existing flow sensing devices use magnetic or mechanical contact sensing methods. The presence or absence of flow is reflected by the position change of the piston or lever in the device under the action of fluid. Due to the large system inertia, the response speed is slow, especially when switching from the presence of fluid to the absence of fluid. It cannot meet the needs of high-speed control scenarios. SUMMARY
[0006] The purpose of the utility model is to provide a valve device capable of flow state monitoring. The valve device can efficiently and quickly predict the opening and closing of the valve element, thereby providing a basis for accurate control of high-speed systems.
[0007] To achieve the above technical purpose, the utility model adopts the following technical solutions:
[0008] A valve device capable of flow state monitoring, the valve device includes a valve element and a fluid pressure sensor, the fluid pressure sensor is arranged at the inlet of the valve element to monitor the fluid pressure at the inlet of the valve element.
[0009] Further, the valve device is arranged in a fluid pipeline system; the fluid pipeline system is a hydraulic pipeline system, and the valve member is a back pressure valve.
[0010] A valve device capable of monitoring flow state, comprising a valve member and a pressure difference sensor arranged on both sides of an inlet and an outlet of the valve member to monitor the pressure difference change on both sides of the valve member.
[0011] Further, the valve device is arranged in a fluid pipeline system; the fluid pipeline system is a hydraulic pipeline system, and the valve member is a back pressure valve.
[0012] A valve device capable of monitoring flow state, comprising a valve member and a push button switch; a push rod mechanism is arranged in the valve member for a main flow path, the push rod mechanism has a push rod, one end of the push rod is a push button output end, the push button output end can extend and retract the valve member, and the push button switch is assembled on the valve member, and a push button of the push button switch is opposite to the push button output end.
[0013] Further, when the pressure in the main flow path of the valve member increases, the push rod mechanism can be driven to make the push button output end of the push rod extend and press the push button of the push button switch; when the pressure in the main flow path of the valve member decreases, the push button output end of the push rod retracts and releases the push button of the push button switch.
[0014] Further, the push rod mechanism is specifically implemented in the following structure: a push rod accommodating chamber communicating with the main flow path is arranged in the body of the valve member, and a push button output hole is arranged on the body of the valve member for the push rod accommodating chamber; the push rod mechanism comprises a push rod, one end of the push rod is a push button output end, the other end of the push rod is a limiting end, and a piston part is arranged in the middle segment of the push rod; the push rod is arranged in the push rod accommodating chamber, the piston part of the push rod is assembled with the inner circumferential surface of the push rod accommodating chamber, and the push button output end of the push rod extends outward from the push button output hole to the body of the valve member; a return spring is arranged for the push rod; a push rod limiting seat is arranged in the valve member, a seat sleeve is arranged on the push rod limiting seat, and the limiting end of the push rod is limited in the seat sleeve.
[0015] Further, the periphery of the push button output hole is arranged in a recessed configuration to form a horn mouth.
[0016] Further, the push rod limiting seat is provided with a first communication hole, and the seat sleeve of the push rod limiting seat is communicated with the outside through the first communication hole.
[0017] Further, a second communication hole is arranged on the body of the valve member, and the push rod accommodating chamber is communicated with the outside through the second communication hole.
[0018] The valve device of the utility model has the beneficial effects that relative to the prior art,
[0019] 1) By setting fluid pressure sensor for valve piece, fluid pressure, differential pressure change condition of inflow port, outflow port of valve piece can be detected, opening and closing condition of valve piece can be efficiently and quickly predicted, thereby providing basis for accurate control of high-speed system.
[0020] 2) Based on valve piece, telescopic button output end is set, and button switch is set, communication or disconnection state of button switch is detected through existing electrical detection mode, fluid pressure change condition in valve piece can be quickly understood, due to the fact that push rod is not in main flow path, size is small, stroke is small, inertia is small, under the action of spring forced return and communication hole, system responds quickly, thereby providing basis for accurate control of high-speed system. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 It is a structure schematic view of the valve device capable of monitoring flow state based on the embodiment 1 of the utility model;
[0022] Figure 2 It is a structure schematic view of the valve device capable of monitoring flow state based on the embodiment 2 of the utility model. DETAILED DESCRIPTION
[0023] The utility model will be further described by specific embodiments:
[0024] Embodiment 1:
[0025] Referring to Figure 1 , the embodiment 1 provides a valve device capable of monitoring flow state (such as Figure 1 indicated in the dashed box), the valve device is composed of valve piece 1 and fluid pressure sensor 3.
[0026] In order to facilitate description, the pipe opening of the fluid inlet side of valve piece 1 is defined as "inflow port", and the pipe opening of the fluid outlet side of valve piece 1 is defined as "outflow port". The inflow port of valve piece 1 is the inflow port of the whole valve device, and the outflow port of valve piece 1 is the outflow port of the whole valve device.
[0027] In the embodiment, the valve piece 1 is a back pressure valve.
[0028] The valve device of the embodiment is arranged in an existing hydraulic pipeline system 6, the inflow port of the valve device is communicated with the pipeline in the hydraulic pipeline system 6, and the outflow port of the valve device is communicated to the oil tank 2.
[0029] The valve device of the embodiment has the innovative feature that the fluid pressure sensor 3 is arranged at the inlet of the valve element 1. During normal operation of the hydraulic pipeline system 6, the fluid pressure sensor 3 can be used to monitor the pressure change at the inlet of the valve element 1 in real time, so that the opening and closing state of the valve element 1 can be quickly sensed, and real-time monitoring of the fluid flow at the valve element 1 can be achieved.
[0030] In the embodiment, the valve element 1 is a back pressure valve, and in other embodiments, the valve element 1 can also be other forms of valve mechanism devices. That is, the basic concept of the embodiment can also be applied to other types of valve elements.
[0031] It should be noted that in other embodiments, fluid pressure sensors can be arranged on both sides of the valve element 1, or differential pressure sensors can be arranged, so that by monitoring the pressure difference change on both sides of the valve element 1, the opening and closing state of the valve element 1 can be quickly sensed.
[0032] The valve device of the embodiment 1 has the advantage that by "arranging a fluid pressure sensor 3 on the valve element 1 to detect the fluid pressure and differential pressure change condition of the inlet and outlet of the valve element 1", the opening and closing state of the valve element 1 can be efficiently and quickly predicted, thereby providing a basis for accurate control of high-speed systems.
[0033] It should be noted that the hydraulic pipeline system 6 can be regarded as a fluid pipeline system, and the innovative concept of the embodiment 1 can also be applied to other forms of fluid pipeline systems in addition to the hydraulic pipeline system 6.
[0034] Embodiment 2:
[0035] Referring to Figure 2 The valve device of the embodiment 2 can monitor the flow state, and the valve device of the embodiment 2 is designed based on the valve element of the prior art.
[0036] Specifically,
[0037] As can be understood by those skilled in the art, the valve element 4 of the prior art has an inlet and an outlet (the definitions are consistent with those in the embodiment 1), and a main flow passage (main oil passage) is arranged inside the valve element 4, the two ends of the main flow passage are respectively communicated with the inlet and the outlet, and a valve core 41 is arranged in the main flow passage.
[0038] It should be noted that the valve device of the embodiment is designed and constructed based on a back pressure valve, and therefore the valve core 41 arranged in the main flow passage of the valve element 4 is a back pressure valve core.
[0039] The following introduces the innovative design, the valve device of the embodiment mainly has two aspects of innovative design:
[0040] The first aspect of innovative design,
[0041] In the valve piece 4, a push rod mechanism is arranged for the main flow path, and the specific structure of the push rod mechanism is arranged as follows:
[0042] A chamber is arranged in the body of the valve piece 4, which is in communication with the main flow path, and the chamber is defined as a push rod accommodating chamber 45.
[0043] A small hole is arranged on the body of the valve piece 4 for the push rod accommodating chamber 45, which is defined as a button output hole (for example, Figure 2 indicated by arrow A), and the push rod accommodating chamber 45 is open to the outside through the button output hole.
[0044] For convenience of description, the peripheral part of the button output hole is defined as a button output part. In the embodiment, the button output part is arranged in a recessed configuration, similar to a horn mouth, and the button output end of the push rod 42 mentioned later extends outward from the horn mouth.
[0045] The main body of the push rod mechanism is a push rod 42, one end of the push rod 42 is defined as a button output end (for example, Figure 2 indicated by arrow A), and the other end of the push rod 42 is defined as a limiting end (for example, Figure 2 indicated by arrow B). The middle segment of the push rod 42 protrudes outward and presents a piston shape, and the protruding middle segment part is defined as a piston part.
[0046] The push rod 42 is arranged in the push rod accommodating chamber 45, and the piston part of the push rod 42 is assembled with the inner circumferential surface of the push rod accommodating chamber 45 to form a sliding piston mechanism, and the button output end of the push rod 42 extends outward from the body of the valve piece 4 at the button output hole (for example, Figure 2 indicated by arrow A).
[0047] A second communication hole 44 is further arranged on the body of the valve piece 4, and the second communication hole 44 is arranged for the push rod accommodating chamber 45. The second communication hole 44 communicates the push rod accommodating chamber 45 with the outside, and its function is to facilitate the fluid to enter and exit the push rod accommodating chamber 45 when the push rod 42 acts in the push rod accommodating chamber 45.
[0048] In addition, a reset spring is further arranged for the push rod 42, and the function of the reset spring is to make the button output end of the push rod 42 retract into the button output hole without external force.
[0049] The limiting end of the push rod 42 is also provided with a push rod limiting seat 43 for limiting the stroke of the push rod 42.
[0050] A recessed part is arranged on the push rod limiting seat 43, which is defined as a seat cover, and the limiting end of the push rod 42 is limited in the seat cover.
[0051] The push rod limiting seat 43 is also provided with a first communication hole 431 for connecting the seat cover of the push rod limiting seat 43 with the outside, which facilitates the fluid to enter and exit the seat cover of the push rod limiting seat 43 when the limiting end of the push rod 42 moves in the seat cover of the push rod limiting seat 43.
[0052] The second aspect of the innovative design,
[0053] The valve element 4 is also provided with a push button switch 5, which is a conventional mechanical push button type electrical switch, having a push button 51, when the push button 51 is pressed, the electrical path of the push button switch 5 is connected, when the push button 51 is released, the electrical path of the push button switch 5 is disconnected.
[0054] The push button switch 5 is installed based on the valve element 4, that is, the body of the valve element 4 is installed together, and the installed push button switch 5, the push button 51 is at the push button output part of the valve element 4, and is opposite to the push button output end of the push rod 42.
[0055] The working principle of the valve device of the embodiment is as follows:
[0056] When the pressure in the main flow passage of the valve element 4 rises, the push rod 42 in the valve element 4 is pushed to act, the push button output end of the push rod 42 extends outward, and the push button 51 of the push button switch 5 does the "pressing button" action, after the push button 51 of the push button switch 5 is pressed, the electrical path of the push button switch 5 is connected;
[0057] When the pressure in the main flow passage of the valve element 4 decreases, the push rod 42 in the valve element 4 is reset under the action of the reset spring, the push button output end of the push rod 42 is retracted inward, the push button 51 of the push button switch 5 does the "release button" action, after the push button 51 of the push button switch 5 is released, the electrical path of the push button switch 5 is disconnected.
[0058] The valve device of the embodiment 2 has the advantages that,
[0059] The "on" or "off" state of the button switch 5 is detected by the existing electrical detection mode, so that the fluid pressure change condition in the valve element 4 can be quickly understood, since the push rod 42 is not in the main flow path, the size is small, the stroke is small, the inertia is small, under the action of the spring forced return and the communication hole, the system responds quickly, thereby providing a basis for the accurate control of the high-speed system.
[0060] The above is only a preferred embodiment of the present application, and is not used to limit the protection scope of the present application, therefore, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A valve apparatus capable of flow condition monitoring, characterised in that: The valve device comprises a valve element and a fluid pressure sensor (3) arranged at an inlet of the valve element to monitor the fluid pressure at the inlet of the valve element; The valve device is arranged in a fluid pipeline system; The fluid pressure sensor (3) is one in number and is arranged at an oil tank side of a hydraulic circuit.
2. The valve apparatus capable of flow condition monitoring according to claim 1, wherein: The fluid pipeline system is a hydraulic pipeline system (6) and the valve element is a back pressure valve.
3. A valve apparatus capable of flow condition monitoring, characterised in that: The valve device comprises a valve element and a push button switch (5); The push rod mechanism is provided in the valve element for a main flow passage and has a push rod (42), one end of the push rod (42) serving as a push button output end, the push button output end being capable of extending out of and retracting into the valve element, The push button switch (5) is assembled on the valve element, and a push button (51) of the push button switch (5) is opposite to the push button output end.
4. The valve device capable of monitoring flow state according to claim 3, wherein: When the pressure in the main flow passage of the valve element rises, the push rod mechanism is driven to extend the push button output end of the push rod (42) and press the push button (51) of the push button switch (5); When the pressure in the main flow passage of the valve element decreases, the push button output end of the push rod (42) is retracted and the push button (51) of the push button switch (5) is released.
5. The valve apparatus capable of flow condition monitoring according to claim 3, wherein: The push rod mechanism is specifically implemented in the following structure: A push rod accommodating chamber (45) communicating with the main flow passage is arranged in the body of the valve element, and a push button output hole is arranged on the body of the valve element for the push rod accommodating chamber (45); The push rod mechanism comprises the push rod (42), one end of the push rod (42) serving as the push button output end, the other end of the push rod (42) serving as a limiting end, and a piston part being arranged at a middle segment of the push rod (42); The push rod (42) is arranged in the push rod accommodating chamber (45), the piston part of the push rod (42) is assembled with an inner circumferential surface of the push rod accommodating chamber (45), and the push button output end of the push rod (42) extends out of the body of the valve element from the push button output hole; A return spring is arranged for the push rod (42); A push rod limiting seat (43) is arranged in the valve element, a seat sleeve is arranged on the push rod limiting seat (43), and the limiting end of the push rod (42) is limited in the seat sleeve.
6. The valve apparatus capable of flow condition monitoring according to claim 5, wherein: A peripheral part of the push button output hole is arranged in a recessed configuration to form a horn mouth.
7. The valve apparatus capable of flow condition monitoring of claim 5, wherein: The push rod limiting seat (43) is provided with a first communication hole (431) communicating the seat sleeve of the push rod limiting seat (43) with the outside.
8. The valve apparatus capable of flow condition monitoring of claim 5, wherein: A second communication hole (44) is arranged on the body of the valve element to communicate the push rod accommodating chamber (45) with the outside.