Valve element position monitoring device of load-sensitive multi-way valve reversing valve
By introducing a monitoring device into the load-sensitive multi-way valve reversing valve, the combination of induction rod and proximity switch is used to solve the problem of the inability to monitor the valve core position, and accurate position detection in special conditions is achieved, which improves the safety and reliability of the system.
Patent Information
- Application Number
- CN202422790191.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-11-15
AI Technical Summary
In special conditions, the valve core position of the existing load-sensitive multi-way valve reversing valve cannot be effectively monitored, especially in emergency situations, whether the valve core is in the middle position cannot be ensured through electrical control logic.
A monitoring device including a housing, upper retaining ring, return spring, lower retaining ring, screw, induction rod and induction assembly is designed. Through the signals emitted by the induction rod at different positions, the position of the valve core is accurately distinguished, with high integration and compact structure, and can accurately obtain real-time position information.
It realizes accurate monitoring of the valve core position in special conditions, ensures real-time acquisition of valve core position information, and improves the safety and reliability of the system.
Smart Images
Figure CN223270753U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a sensitive multi-way valve reversing valve, in particular to an improvement of a load sensitive multi-way valve reversing valve. Technical Background
[0002] The directional control valve of a general load-sensitive multi-way valve is a sliding structure, such as Figure 5 、 6 As shown, one end of the valve core 3 houses a spring assembly 5, with a spring and retaining ring installed within the spring chamber. Upper and lower spring retaining rings are connected to the valve core via a screw. Return springs are located within the upper and lower retaining rings, ensuring automatic return of the valve core. The other end houses a handle mechanism for switching direction. In conventional multi-way valves, electronic control logic controls the valve core position for safety. However, in special situations, such as emergencies, manual control is required. In these situations, the electronic control logic cannot guarantee that the valve core is in the neutral position (i.e., whether the valve port is open).
[0003] Therefore, how to monitor the valve core position under special conditions has become a technical problem that needs to be solved urgently in this field. Summary of the Invention
[0004] In view of the above problems, the utility model provides a valve core position monitoring device for a load-sensitive multi-way valve reversing valve, which has a simple structure and can monitor the valve core position under special conditions.
[0005] The technical solution of the utility model is: comprising a main valve core reversing device, a valve body and a valve core, wherein the upper end of the valve core is provided with an extension section, and a central screw hole is opened at the top end of the extension section.
[0006] Also included is a monitoring device; the monitoring device includes a housing, an upper retaining ring, a return spring, a lower retaining ring, a screw, a spring, a sensing rod and a sensing assembly;
[0007] The housing is provided with a first hole, a second hole and a third hole with decreasing diameters from bottom to top, and a side groove is provided on the outer side of the housing at a height corresponding to the third hole for accommodating the sensing component;
[0008] The upper end of the valve core extends out of the reversing valve body and into the hole 1, and a lower retaining ring, a return spring and an upper retaining ring are sleeved on the outside of the valve core and the extending section from bottom to top;
[0009] The screw rod passes through the upper retaining ring, the return spring and the lower retaining ring in sequence from top to bottom, and then extends into the central screw hole of the extension section to be threadedly connected with the valve core;
[0010] A spring and a sensing rod are arranged in the hole three from top to bottom, and the lower end of the sensing rod abuts against the top surface of the screw rod.
[0011] Furthermore, the sensing component includes an upper proximity switch and a lower proximity switch having an upper and lower positional relationship.
[0012] Furthermore, the upper end of the screw is provided with a terminal.
[0013] The upper retaining ring is provided with an upper step surface 1 and a lower step surface 1. The outer diameter of the upper step surface 1 is larger than the inner diameter of the second hole. The outer diameter of the lower step surface 1 is adapted to the inner circle of the upper end of the reset spring.
[0014] The middle hole of the upper retaining ring has an upper step hole 1 and a lower step hole 1, the upper step hole 1 is adapted to the end of the screw, and the lower step hole 1 is adapted to the extended section of the valve core.
[0015] Furthermore, the lower retaining ring is provided with a second upper step surface, and the second upper step surface is adapted to the inner circle of the lower end of the reset spring.
[0016] The lower retaining ring is provided with an upper step hole 2 and a lower step hole 2, the upper step hole 2 is adapted to the extended section of the valve core, and the lower step hole 2 is adapted to the outer circle of the valve core.
[0017] Furthermore, the lower section of the sensing rod is provided with a contact section having a diameter smaller than that of the rod body;
[0018] A retaining spring is provided at the opening of the second hole.
[0019] Furthermore, a sensing block is provided on the upper portion of the sensing rod.
[0020] Furthermore, the overall height of the upper retaining ring, the return spring and the lower retaining ring after assembly is equal to the axial height of the hole one.
[0021] The present invention uses different signals emitted by the monitoring device and the sensing device when they are in different positions to accurately identify whether the valve core is in the upper, middle, or lower position. Compared with the existing technology, the present invention has a high degree of integration, a compact structure, and can accurately obtain the real-time position information of the valve core. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a structural diagram of the utility model.
[0023] Figure 2 This is a schematic diagram of the working state 1 of the utility model.
[0024] Figure 3 This is a schematic diagram of the second working state of the utility model.
[0025] Figure 4 This is a schematic diagram of the third working state of the utility model.
[0026] Figure 5It is a structural diagram of the background technology of this utility model.
[0027] Figure 6 It is a structural diagram of a spring assembly in the background technology.
[0028] In the figure: 1 is the main valve core reversing device,
[0029] 2 is the valve body,
[0030] 3 is the valve core, 31 is the extension section,
[0031] 4 is a monitoring device, 41 is a housing, 411 is a convex inner cavity, 42 is an upper retaining ring, 43 is a return spring, 44 is a lower retaining ring, 45 is a screw, 46 is a spring, 47 is a sensing rod, 471 is a sensing block, 48 is a retaining spring, 49 is a sensing component, 491 is an upper proximity switch, 492 is a lower proximity switch, 401 is hole 1, 402 is hole 2, 403 is hole 3, 404 is a side groove,
[0032] 5 is a spring assembly. DETAILED DESCRIPTION
[0033] In order to make the application purpose, technical solution and beneficial technical effects of this application clearer, the application is further described in detail below with reference to the embodiments. It should be understood that the embodiments described in this specification are only for explaining this application and are not intended to limit this application.
[0034] For simplicity, this application only explicitly discloses certain numerical ranges. However, any lower limit may be combined with any upper limit to form an unspecified range; and any lower limit may be combined with other lower limits to form an unspecified range, and similarly, any upper limit may be combined with any other upper limit to form an unspecified range. In addition, although not explicitly stated, each point or individual value between the endpoints of a range is included in the range. Thus, each point or individual value may serve as its own lower limit or upper limit and be combined with any other point or individual value, or with other lower limits or upper limits, to form an unspecified range.
[0035] In the description of this application, it should be noted that, unless otherwise specified, “above” and “below” are inclusive of the number, and “a variety” in “one or more” means two or more.
[0036] The above disclosure of the present application is not intended to describe every disclosed embodiment or every implementation in the present application. The following description more specifically illustrates exemplary embodiments. In many places throughout the application, guidance is provided through a series of examples, which can be used in various combinations. In each example, the enumeration is intended only as a representative group and should not be construed as exhaustive.
[0037] The following is combined with Figure 1-4 The embodiments of the present utility model are described in detail.
[0038] The utility model comprises a main valve core reversing device 1, a valve body 2 and a valve core 3. The upper end of the valve core 3 is provided with a protruding section 31, and the top end of the protruding section 31 is provided with a central screw hole.
[0039] It also includes a monitoring device 4 ; the monitoring device 4 includes a housing 41 , an upper retaining ring 42 , a return spring 43 , a lower retaining ring 44 , a screw 45 , a spring 46 , a sensing rod 47 and a sensing assembly 49 .
[0040] The housing 1 is provided with a hole 1 401 , a hole 2 402 and a hole 3 403 with decreasing diameters from bottom to top. A side groove 404 is provided on the outer surface of the housing 1 at a height corresponding to the hole 3 403 for accommodating the sensing component 49 .
[0041] The upper end of the valve core 3 extends out of the reversing valve body and into the hole 1 401. A lower retaining ring 44, a return spring 43 and an upper retaining ring 42 are sleeved on the outside of the valve core 3 and the extending section 31 from bottom to top.
[0042] The screw 45 passes through the upper retaining ring 42 , the return spring 43 and the lower retaining ring 44 in sequence from top to bottom, and then extends into the central screw hole of the extension section 31 to be threadedly connected to the valve core 3 .
[0043] A spring 46 and a sensing rod 47 are provided from top to bottom in the third hole 403, and the lower end of the sensing rod 47 abuts against the top surface of the screw 45. When the sensing rod 47 moves up and down, the sensing component can monitor its real-time position.
[0044] Furthermore, the sensing assembly includes an upper proximity switch 491 and a lower proximity switch 492 having an upper and lower position relationship. The specific position is set according to the height of the hole three and the stroke of the sensing rod.
[0045] Furthermore, a tip is provided at the upper end of the screw rod 45 .
[0046] The upper retaining ring 42 is provided with an upper step surface 1 and a lower step surface 1. The outer diameter of the upper step surface 1 is larger than the inner diameter of the second hole 402, and the outer diameter of the lower step surface 1 is adapted to the inner circle of the upper end of the reset spring 43 to ensure that the end of the screw 45 will not extend into the second hole 402 when the valve core 3 is upward.
[0047] The middle hole of the upper retaining ring 42 has an upper step hole 1 and a lower step hole 1. The upper step hole 1 is adapted to the end of the screw 45, and the lower step hole 1 is adapted to the extended section 31 of the valve core 3.
[0048] Furthermore, the lower retaining ring 44 is provided with a second upper step surface, which is adapted to the inner circle of the lower end of the return spring 43.
[0049] The lower retaining ring 44 is provided with an upper step hole 2 and a lower step hole 2, the upper step hole 2 is adapted to the extension section 31 of the valve core 3, and the lower step hole 2 is adapted to the outer circle of the valve core 3. The return spring 43 is respectively mounted on the step surface 1 and the upper step surface 2 to ensure that the return spring 43 does not deviate.
[0050] Furthermore, the lower section of the sensing rod 47 is provided with a contact section having a diameter smaller than that of the rod body.
[0051] A retaining spring 48 is provided at the opening of the second hole 402 to limit the travel of the sensing rod 47 .
[0052] Furthermore, a sensing block 471 is provided on the upper portion of the sensing rod 47 .
[0053] Furthermore, the overall height of the upper retaining ring 42, the return spring 43 and the lower retaining ring 44 after assembly is equal to the axial height of the hole 1 401. At this time, the return spring 43 bears the pressure of the top spring 46.
[0054] The working principle of this utility model is:
[0055] like Figure 3 As shown, in the working state, when the valve core 3 moves upward, the protruding section 31 at the top of the valve core 3 pushes the sensing rod 47. During the movement of the sensing rod 47, the sensing block 471 installed thereon triggers the upper proximity switch 491, and outputs a signal to the outside that the valve core 3 moves upward to the upper proximity switch 491. At this time, it can be known that the valve core 3 is in the upper position.
[0056] like Figure 4 As shown, when the valve core 3 moves downward, the spring 46 presses the sensing rod 47. Since the lower end of the sensing rod 47 is in contact with the screw 45, the screw 45 moves synchronously with the valve core 3. The sensing rod 47 also moves downward synchronously under the action of the spring 46. The sensing block 471 on the sensing rod 47 triggers the lower proximity switch 492 to output a signal indicating that the valve core 3 is deflected downward. At this time, it can be known that the valve core 3 is in the lower position.
[0057] like Figure 2 As shown, when the valve core 3 is between the two proximity switches, both proximity switches have no signal output, and it can be determined that it is in the middle position.
[0058] It should be noted that the above-described specific embodiments are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that, based on the technical content disclosed in this application, various modifications, equivalent substitutions, and variations may be made to the present invention. However, as long as these modifications do not depart from the spirit of the present invention, they are within the scope of protection of the present invention. Furthermore, certain terms used in the specification and claims of this application are not intended to be limiting and are provided solely for ease of description.
Claims
1. A valve core position monitoring device for a load-sensitive multi-way valve reversing valve, comprising a main valve core reversing device (1), a valve body (2) and a valve core (3), wherein the upper end of the valve core (3) is provided with an extension section (31), and a central screw hole is provided at the top end of the extension section (31). It is characterized by: Also included is a monitoring device (4); the monitoring device (4) includes a housing (41), an upper retaining ring (42), a return spring (43), a lower retaining ring (44), a screw (45), a spring (46), a sensing rod (47), and a sensing assembly (49); The housing (41) is provided with a hole (401), a hole (402), and a hole (403) with decreasing diameters from bottom to top, and a side groove (404) is provided on the outer surface of the housing (41) at a height corresponding to the hole (403) for accommodating the sensing component (49); The upper end of the valve core (3) extends out of the reversing valve body and into the hole 1 (401), and a lower retaining ring (44), a return spring (43) and an upper retaining ring (42) are sleeved on the outside of the valve core (3) and the extending section (31) from bottom to top; The screw (45) passes through the upper retaining ring (42), the return spring (43) and the lower retaining ring (44) in sequence from top to bottom, and then extends into the central screw hole of the extension section (31) to be threadedly connected to the valve core (3); A spring (46) and a sensing rod (47) are provided in the third hole (403) from top to bottom, and the lower end of the sensing rod (47) abuts against the top surface of the screw rod (45).
2. The valve core position monitoring device of a load-sensing multi-way valve according to claim 1 is characterized in that: The sensing component comprises an upper proximity switch (491) and a lower proximity switch (492) having an upper and lower positional relationship.
3. The valve core position monitoring device of a load-sensing multi-way valve according to claim 1, characterized in that: The upper end of the screw (45) is provided with a terminal. The upper retaining ring (42) is provided with an upper step surface 1 and a lower step surface 1. The outer diameter of the upper step surface 1 is larger than the inner diameter of the second hole (402). The outer diameter of the lower step surface 1 is adapted to the inner circle of the upper end of the return spring (43). The middle hole of the upper retaining ring (42) has an upper step hole 1 and a lower step hole 1, the upper step hole 1 is adapted to the end of the screw (45), and the lower step hole 1 is adapted to the extended section (31) of the valve core (3).
4. The valve core position monitoring device of a load-sensing multi-way valve according to claim 1 is characterized in that: The lower retaining ring (44) is provided with a second upper step surface, and the second upper step surface is adapted to the inner circle of the lower end of the return spring (43). The lower retaining ring (44) is provided with an upper step hole 2 and a lower step hole 2, the upper step hole 2 is adapted to the extended section (31) of the valve core (3), and the lower step hole 2 is adapted to the outer circle of the valve core (3).
5. The device for monitoring the valve core position of a load-sensing multi-way valve according to claim 1, characterized in that: The lower section of the sensing rod (47) is provided with a contact section having a diameter smaller than that of the rod body; A retaining spring (48) is provided at the opening of the second hole (402).
6. The device for monitoring the valve core position of a load-sensing multi-way valve according to claim 1, characterized in that: A sensing block (471) is provided on the upper portion of the sensing rod (47).
7. The device for monitoring the valve core position of a load-sensing multi-way valve according to claim 1, characterized in that: The overall height of the upper retaining ring (42), the return spring (43) and the lower retaining ring (44) after assembly is equal to the axial height of the hole 1 (401).