Self-operated sliding plate valve
By using a self-operated sliding plate valve to compare the medium pressure with the spring, the diaphragm actuates and drives the sliding plate assembly, solving the problems of complex structure and high cost of existing pressure control valves, and realizing simple and low-cost automatic pressure control.
Patent Information
- Application Number
- CN202423129626.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-18
AI Technical Summary
Existing pressure control valves have complex structures, complex control logic, and high costs, requiring complex control loops and external energy supply.
Design a self-operated sliding plate valve that compares the pressure of the medium itself with the set pressure of the spring, and drives the sliding plate assembly to change the valve opening through the action of the diaphragm, so as to realize the automatic control of the pressure before or after the valve, eliminating the need for controllers and pressure transmitters, and eliminating the dependence on power or air sources.
It achieves pressure control with simple structure, concise control logic and low cost, and can automatically adjust the pressure before or after the valve to a constant value, reducing the complexity of the equipment and the operating cost.
Smart Images
Figure CN223524582U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pressure control valve technology, and specifically to a self-operated sliding plate valve. Background Technology
[0002] In process industries, if automatic pressure control of pipeline media is required, control valves need to be installed on the pipelines. The pipeline pressure is controlled by controlling the opening degree of the valves. There are usually two types of control: inlet pressure control and outlet pressure control.
[0003] To achieve automatic pressure control, a control signal is typically needed for the control valve, as well as the necessary air or power supply for its operation. Therefore, a single control loop is usually required to implement the control function. This loop includes components such as the control valve, controller, and pressure transmitter. Taking a pneumatic control valve as an example, its control loop for automatic pressure control is as follows: Figure 1 As shown, the setpoint is the desired pipeline pressure, and the measured value is the currently detected actual pressure. Based on the deviation between the two, the controller performs calculations and sends a continuous control signal to the valve positioner, typically a 4-20mA analog signal. The valve positioner converts the analog signal into a pneumatic signal (compression control pressure value), which actuates the actuator, driving the valve core to move and changing the flow cross-sectional area of the medium. This causes a change in the medium flow rate at the valve, and consequently, a change in the pressure value. When the measured value and the setpoint are within the allowable deviation range under operating conditions, automatic pressure control is achieved. From the above description, it can be seen that current pressure control valves have relatively complex structures, complex control logic, and high costs.
[0004] Therefore, developing a pressure control valve with a simple structure, relatively simple control logic, and low cost is of great practical significance. Utility Model Content
[0005] Due to the aforementioned deficiencies in existing technologies, this utility model provides a pressure control valve with a simple structure, relatively simple control logic, and low cost. Specifically, it is a self-operated sliding plate valve that can achieve pressure control before or after the valve by relying on the force of the medium itself. It can eliminate the need for a controller and pressure transmitter in the control circuit, and does not require a power or air source for the valve to operate. The structure is simpler and the cost is lower, thus solving the defects of existing pressure control valves that have relatively complex structures, complex control logic, and high costs.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A self-operated sliding plate valve includes a valve body and an actuator;
[0008] The valve body includes a valve body, and a sliding plate assembly is arranged inside the valve body;
[0009] The actuator comprises an actuator housing, a spring, a diaphragm, a pressure lead port and a relief valve, the spring and the diaphragm are arranged in the actuator housing, the diaphragm is horizontally arranged and separates the space in the actuator housing into two independent spaces, the diaphragm is connected with the slide plate assembly through a transmission member, the side of the diaphragm away from the transmission member is in contact with the spring, the spring is vertically arranged, the pressure lead port and the relief valve are further connected with the actuator housing and are located on the side of the diaphragm connected with the transmission member, and the pressure lead port is connected with the pipeline before or after the self-operated slide plate valve through a pressure lead pipe.
[0010] The self-operated slide plate valve has reasonable and relatively simple structure design, takes the medium in the pipeline before or after the valve as a pressure source, directly leads the medium to the lower side of the actuator diaphragm through the pressure lead port, and the upper side of the actuator diaphragm is provided with a spring, the diaphragm is actuated according to the comparison between the pressure of the medium led to the lower side of the actuator diaphragm and the force of the spring, and then drives the slide plate assembly (valve core) to actuate, and then the self-operated slide plate valve is opened and closed or the opening degree of the self-operated slide plate valve is changed, the controller and the pressure transmitter in the control loop are removed, and the power supply or the gas source required for the operation of the control valve is also not needed, so that the self-operated slide plate valve has simple structure, simple control logic and low cost, and has good application prospect.
[0011] As a preferred technical scheme,
[0012] The self-operated slide plate valve as described above, the slide plate assembly comprises a fixed plate and a slide plate which are parallel to each other.
[0013] The slide plate is fixedly connected with the diaphragm through a transmission member.
[0014] The self-operated slide plate valve as described above, a group I of through holes which penetrate through the slide plate are formed in the slide plate.
[0015] A group II of through holes which match the group I of through holes are formed in the fixed plate.
[0016] The self-operated slide plate valve as described above, the pressure lead port is connected with the pipeline before the self-operated slide plate valve.
[0017] The initial state of the self-operated slide plate valve is a closed state, that is, when the pressure in the pipeline before the self-operated slide plate valve does not reach a set threshold value, the self-operated slide plate valve is in the closed state.
[0018] That is, the self-operated slide plate valve is a valve front pressure maintaining type, the pressure before the valve is P1, the pressure after the valve is P2, and the initial position of the self-operated slide plate valve is closed, when P1 is greater than the set pressure of the spring, the diaphragm is actuated upward, the slide plate assembly is actuated upward, the valve is opened, the medium flows to the rear of the valve through the valve, P1 is reduced, and when P1 is balanced with the set pressure of the spring, the valve front pressure maintaining function is realized.
[0019] A self-operated slide valve as described above, the pressure introduction port is connected with the pipeline behind the self-operated slide valve;
[0020] The initial state of the self-operated slide valve is the open state, that is, when the pressure in the pipeline behind the self-operated slide valve does not reach the set threshold, the self-operated slide valve is in the open state.
[0021] That is, the self-operated slide valve without pressure reduction behind the valve, the pressure before the valve is P1, the pressure behind the valve is P2, the initial position of the self-operated slide valve is open, the pressure P2 behind the valve is introduced below the diaphragm, when P2 is greater than the set pressure of the spring, the diaphragm acts upward, driving the valve core to act upward, the valve is closed, the flow of the medium through the valve is reduced, P2 is reduced, and when P2 is balanced with the set pressure of the spring, the pressure reduction behind the valve is realized.
[0022] A self-operated slide valve as described above, the actuator further comprises a setting screw;
[0023] The setting screw is arranged in the spring, and one end of the setting screw penetrates out of the actuator shell. The pressure of the spring can be set through the setting screw, and the applicability is good.
[0024] The above technical scheme is only one feasible technical scheme of the utility model, and the protection scope of the utility model is not limited to this. Those skilled in the art can reasonably adjust the specific design according to actual needs.
[0025] The above-mentioned utility model has the following advantages or beneficial effects:
[0026] (1) The self-operated slide valve of the utility model can compare the pressure of the medium itself with the set pressure of the spring, make the diaphragm act, drive the valve core to act, change the flow of the medium through the valve, and make the pressure before the valve or the pressure behind the valve a constant value.
[0027] (2) The self-operated slide valve of the utility model has reasonable and relatively simple structure, removes the controller and pressure transmitter in the control loop, and does not need the power supply or gas source required for the operation of the control valve. The structure is simple, the control logic is simple, the cost is low, and the application prospect is good. BRIEF DESCRIPTION OF DRAWINGS
[0028] The utility model and its features, shapes and advantages will become more apparent through reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings. The same reference signs indicate the same parts throughout the drawings. The drawings can not be drawn to scale, and the emphasis is on showing the main idea of the utility model.
[0029] Figure 1 A control loop schematic diagram for realizing pressure automatic control of the prior art pneumatic control valve;
[0030] Figure 2 It is a structure schematic view of the self-operated slide valve of the utility model;
[0031] Figure 3 It is a working schematic view of the valve front pressure stabilizing type self-operated slide valve;
[0032] Figure 4 It is a working schematic view of the valve rear pressure reducing type self-operated slide valve;
[0033] Wherein, 1 is a valve body, 2 is a setting screw, 3 is an actuator, 4 is a diaphragm, 5 is a pressure inlet, 6 is a relief valve, 7 is a spring, and 8 is a slide plate assembly. DETAILED DESCRIPTION
[0034] The utility model will be further explained in combination with the drawings and specific examples, but not as the limitation of the utility model.
[0035] Example 1
[0036] A valve front pressure stabilizing type self-operated slide valve, as shown in Figure 2 and 3 , comprising a valve body part and an actuator;
[0037] The valve body part comprises a valve body 1, a slide plate assembly 8 is arranged in the valve body 1, the slide plate assembly 8 comprises a fixed plate and a slide plate parallel to each other, a group I of through holes is formed in the slide plate, and a group II of through holes matched with the group I of through holes is formed in the fixed plate;
[0038] The actuator 3 comprises an actuator housing, a setting screw 2, a spring 7, a diaphragm 4, a pressure inlet 5 and a relief valve 6, the spring 7 and the diaphragm 4 are arranged in the actuator housing, the diaphragm 4 is horizontally arranged and separates the space in the actuator housing into two spaces independent of each other, the diaphragm 4 is fixedly connected with the slide plate through a transmission part, the side, away from the transmission part, of the diaphragm 4 is in contact with the spring 7, the spring 7 is vertically arranged, the setting screw 2 is arranged in the spring 7, that is, the spring 7 is sleeved outside the setting screw 2, one end of the setting screw 2 penetrates out of the actuator housing, and the pressure inlet 5 and the relief valve 6 are further connected to the actuator housing and located on the side of the diaphragm 4 connected with the transmission part, the pressure inlet 5 is connected with the pipeline in front of the self-operated slide valve through a pressure inlet pipe, and the initial state of the self-operated slide valve is a closed state.
[0039] Its operation is as shown in Figure 3As shown, the valve front pressure is P1, the valve rear pressure is P2, and the self-operated slide valve initial position is closed, when P1 is greater than the spring set pressure, the diaphragm moves upward, driving the slide plate assembly to move upward, the valve is opened, the medium flows through the valve to the valve rear, P1 decreases, when P1 is balanced with the spring set pressure, the valve front pressure stabilization effect is realized.
[0040] Embodiment 2
[0041] A valve rear pressure reducing type self-operated slide valve, as shown in Figure 2 and 4 The structure is basically the same as that of embodiment 1, except that the pressure introduction port 5 is connected with the pipeline behind the self-operated slide valve through a pressure introduction pipe, and the initial state of the self-operated slide valve is open.
[0042] As shown in Figure 4 , the valve front pressure is P1, the valve rear pressure is P2, and the self-operated slide valve initial position is open, the valve rear pressure P2 is introduced to the diaphragm below, when P2 is greater than the spring set pressure, the diaphragm moves upward, driving the valve core to move upward, the valve is closed, the medium flow through the valve is reduced, P2 decreases, when P2 is balanced with the spring set pressure, the valve rear pressure reduction effect is realized.
[0043] It has been verified that the self-operated slide valve of the utility model can compare the pressure of the medium itself with the set pressure of the spring, make the diaphragm move, drive the valve core to move, change the medium flow through the valve, and make the valve front pressure or the valve rear pressure a constant value; the structure design is reasonable and relatively simple, the controller and the pressure transmitter in the control loop are removed, and the power supply or the gas source required for the control valve work is also not needed, the structure is simple, the control logic is simple, the cost is low, and the application prospect is good.
[0044] Those skilled in the art should understand that those skilled in the art can realize the change examples in combination with the prior art and the above embodiments, which will not be described here. Such change examples do not affect the essential content of the utility model, which will not be described here.
[0045] The preferred embodiments of the present application are described above. It should be understood that the present application is not limited to the specific embodiments described above, wherein the devices and structures not described in detail should be understood as being implemented in the ordinary way in the art; any person skilled in the art, without departing from the scope of the technical scheme of the present application, can make many possible changes and modifications to the technical scheme of the present application by using the disclosed methods and technical contents, or modify equivalent embodiments, which does not affect the essential content of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the content of the technical scheme of the present application, still belongs to the scope of protection of the technical scheme of the present application.
Claims
1. A self-reliant slide plate valve characterized by, The valve body part comprises a valve body, and a slide plate assembly is arranged in the valve body. The actuating mechanism comprises an actuating mechanism shell, a spring, a diaphragm, a pressure lead-in port and a relief valve, the spring and the diaphragm are arranged in the actuating mechanism shell, the diaphragm is arranged horizontally and separates the space in the actuating mechanism shell into two independent spaces, the diaphragm is connected with the slide plate assembly through a transmission member, the side of the diaphragm away from the transmission member is in contact with the spring, the spring is arranged vertically, the pressure lead-in port and the relief valve are further connected with the actuating mechanism shell and are located on the side of the diaphragm connected with the transmission member, and the pressure lead-in port is connected with the pipeline before or after the self-operated slide plate valve through a pressure lead-in pipe. The slide plate assembly comprises a fixed plate and a slide plate which are parallel to each other.
2. A self-reliant slide plate valve according to claim 1, characterized in that The slide plate is fixedly connected with the diaphragm through the transmission member. A group of through holes I are formed in the slide plate.
3. A self-reliant slide plate valve according to claim 2, characterized in that A group of through holes II matching the group of through holes I are formed in the fixed plate. The pressure lead-in port is connected with the pipeline before the self-operated slide plate valve.
4. A self-reliant slide plate valve according to claim 1, characterized in that The initial state of the self-operated slide plate valve is closed. The pressure lead-in port is connected with the pipeline after the self-operated slide plate valve.
5. A self-reliant slide plate valve according to claim 1, characterized in that The initial state of the self-operated slide plate valve is opened. The actuating mechanism further comprises a setting screw.
6. A self-reliant slide plate valve according to claim 1, characterized in that The setting screw is arranged in the spring and one end of the setting screw penetrates through the actuating mechanism shell.