Piston type flow and pressure regulating valve

Abstract

The utility model discloses a piston type flow regulating and pressure regulating valve, which comprises a valve body, an inner shell, a throttling filter cartridge, a piston, a spring and a driving component, the inner shell is arranged in the valve body, the piston is coaxially and slidably arranged in the inner shell, two ends of the spring respectively tension the inner shell and the piston, the throttling filter cartridge is coaxially and slidably arranged in the piston, and the driving component is arranged in the valve body. A check block matched with the piston is arranged on the outer side of the throttling filter cartridge, the driving assembly is installed in the valve body, the power output end of the driving assembly is connected with the inner end of the throttling filter cartridge, and the piston is matched with a flow channel between the valve body and the inner shell. The valve is convenient to use, internal impurities are convenient to clean, flow control through throttling, impurity filtering and full-closing and full-opening state switching can be achieved by means of the combined action of the throttling filter cylinder and the piston according to application scenes and actual fluid conditions, and particularly the defect that due to the fact that a traditional piston type flow and pressure adjusting valve is limited by a flow channel of the traditional piston type flow and pressure adjusting valve, the valve cannot be opened or closed is overcome. And sundries in the runner are inconvenient to clean.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a piston-type flow regulating and pressure regulating valve. Background Technology

[0002] Piston-type flow control valves control the valve opening by the back-and-forth movement of a piston inside the valve body, thereby effectively controlling flow rate and pressure. The flow channel inside the piston valve is axisymmetric. When the valve is open, the water flow converges at the outlet, and the fluid does not generate turbulence as it flows through, effectively eliminating cavitation. When the piston valve is fully closed, it effectively stops the water flow, achieving zero leakage and thus preventing the transmission of upstream pressure.

[0003] The change in the flow channel area of ​​a piston-type flow control valve is achieved by a piston moving linearly along the pipeline axis. Regardless of the piston's position, the cross-section inside the valve cavity is always annular. Therefore, in pipeline systems, especially in sewage or river systems, the flow channel of a piston-type flow control valve is often blocked by debris. The debris is difficult to clean in the narrow annular flow channel, especially as the flow channel contracts towards the axis at the valve outlet. This shape further increases the difficulty of cleaning. Therefore, a piston-type flow control and pressure regulating valve that can both throttle and regulate flow and facilitate the filtration and cleaning of debris is needed. Utility Model Content

[0004] The purpose of this invention is to provide a piston-type flow regulating and pressure regulating valve to solve the problem that the traditional piston-type flow regulating valve is affected by the shape of the flow channel, making it difficult to clean debris in the flow channel.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A piston-type flow regulating and pressure regulating valve includes a valve body, an inner shell, a throttling filter cartridge, a piston, a spring, and a drive assembly. The inner shell is installed inside the valve body. The piston is coaxially and slidably installed in the inner shell. The two ends of the spring respectively tighten the inner shell and the piston. The throttling filter cartridge is coaxially and slidably installed inside the piston. A stop block adapted to the piston is provided on the outer side of the throttling filter cartridge. The drive assembly is installed inside the valve body, and its power output end is connected to the inner end of the throttling filter cartridge. The flow channels between the piston, the valve body, and the inner shell are adapted to each other.

[0007] A further technical solution is as follows: the drive assembly includes a valve shaft, a screw, and a guide post; the throttling filter cartridge is slidably connected to the guide post; the guide post is installed inside the inner housing; the screw is rotatably installed inside the inner housing; the throttling filter cartridge is threadedly connected to the screw; the valve shaft is rotatably installed on the valve body; and the inner end of the valve shaft is drively connected to the screw through a bevel gear pair.

[0008] A further technical solution is that the throttling filter cartridge is divided into a filtration section and a sealing section in sequence along the flow direction by a partition.

[0009] A further technical solution is that the length of the filter section is not less than the length of the flow channel.

[0010] A further technical solution is that the filter section is provided with multiple filter holes.

[0011] A further technical solution is that the filter section has multiple filter holes with gradually increasing diameters arranged along its axial direction.

[0012] A further technical solution is that the baffle is located on the sealing part, and the shortest distance between the baffle and the filter part is not less than the length of the filter part.

[0013] A further technical solution is that a sealing ring is provided between the throttling filter cartridge and the piston.

[0014] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0015] This utility model proposes a piston-type flow regulating and pressure regulating valve. This valve is easy to use and easy to clean internal debris. With the combined action of the throttling filter cartridge and the piston, it can realize the switching between throttling and flow control, filtering of debris and fully closed and fully open states according to the application scenario and actual fluid conditions. In particular, it overcomes the problem that traditional piston-type flow regulating and pressure regulating valves are inconvenient to clean debris in the flow channel due to the limitation of their own flow channel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a piston-type flow regulating and pressure regulating valve according to the present invention.

[0017] Figure 2 This utility model Figure 1 A schematic diagram of the structure in the filtering state.

[0018] Figure 3 This utility model Figure 1 A schematic diagram of the structure in a closed state.

[0019] Reference numerals: 1. Valve body; 2. Inner shell; 3. Throttling filter cartridge; 4. Piston; 5. Spring; 6. Drive assembly; 7. Stop block; 8. Valve shaft; 9. Screw; 10. Guide post; 11. Baffle plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0026] This implementation example Figure 1 , Figure 2 and Figure 3 As shown, a piston-type flow regulating and pressure regulating valve includes a valve body 1, an inner shell 2, a throttling filter cartridge 3, a piston 4, a spring 5, and a drive assembly 6. The inner shell 2 is installed inside the valve body 1. The piston 4 is coaxially and slidably installed in the inner shell 2. The two ends of the spring 5 respectively tighten the inner shell 2 and the piston 4. The throttling filter cartridge 3 is axially and slidably installed inside the piston 4. A stop block 7 adapted to the piston 4 is provided on the outer side of the throttling filter cartridge 3. The drive assembly 6 is installed inside the valve body 1 and its power output end is connected to the inner end of the throttling filter cartridge 3. The flow channels between the piston 4, the valve body 1, and the inner shell 2 are adapted to each other.

[0027] This valve can select different operating states depending on the fluid conditions. For sewage systems (such as urban sewage pipes and river pipes), the drive assembly 6 can drive the throttling filter cartridge 3 towards the inlet end of the valve body 1 until the outer end of the throttling filter cartridge 3 enters the inlet end of the valve body 1, forming a filtration chamber. At this time, the piston 4 remains stationary under the tension of the spring 5 (which actually tightens the piston 4). Through the above control, the valve enters a flow-limited filtration state (such as...). Figure 2 The flow regulation effect is achieved by controlling the filtration area through the continued advancement of the throttling filter cartridge 3; when filtration is not required and valve closure is necessary, the throttling filter cartridge 3 is further advanced, and at the same time, the stop block 7 on the throttling filter cartridge 3 pushes the piston 4 to overcome the tension of the spring 5 and move together. The piston 4 abuts against the inner wall of the valve body 1, closing the flow channel and entering the valve closure state (e.g. Figure 3 When the valve needs to be opened, the drive assembly 6 works in reverse, the throttling filter cartridge 3 and the piston gradually retract until they are fully reset, and the valve is fully open (e.g., Figure 1 ).

[0028] Preferably, the drive assembly 6 includes a valve shaft 8, a screw 9, and a guide post 10. The throttling filter cartridge 3 is slidably connected to the guide post 10. The guide post 10 is installed inside the inner housing 2. The screw 9 is rotatably installed inside the inner housing 2. The throttling filter cartridge 3 is threadedly connected to the screw 9. The valve shaft 8 is rotatably installed on the valve body 1. The inner end of the valve shaft 8 is connected to the screw 9 via a bevel gear pair.

[0029] The valve shaft 8 is driven by a worm gear actuator. Under the drive of the actuator, the valve shaft 8 rotates. The valve shaft 8 also drives the screw 9 to rotate through a bevel gear pair. The screw 9 drives the throttling filter cartridge 3 to move back and forth along its own axis, thereby realizing the switching of various working states of the valve.

[0030] Preferably, the throttling filter cartridge 3 is divided into a filtration section and a sealing section in sequence along the flow direction by the baffle 11.

[0031] Preferably, the length of the filter section is not less than the length of the flow channel.

[0032] Preferably, the filter section is provided with multiple filter holes.

[0033] Preferably, the filter section has multiple filter holes with gradually increasing diameters along its axial direction.

[0034] The diameter of the filter pores increases or decreases in the same direction to change the flow rate.

[0035] Preferably, the baffle 7 is located on the sealing part, and the shortest distance between the baffle 7 and the filter part is not less than the length of the filter part.

[0036] Preferably, a sealing ring is provided between the throttling filter cartridge 3 and the piston 4.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A piston flow and pressure regulating valve, characterized by: The device includes a valve body (1), an inner housing (2), a throttling filter cartridge (3), a piston (4), a spring (5), and a drive assembly (6). The inner housing (2) is installed inside the valve body (1). The piston (4) is coaxially and slidably installed in the inner housing (2). The two ends of the spring (5) respectively tighten the inner housing (2) and the piston (4). The throttling filter cartridge (3) is coaxially and slidably installed in the piston (4). A stop block (7) adapted to the piston (4) is provided on the outside of the throttling filter cartridge (3). The drive assembly (6) is installed inside the valve body (1) and its power output end is connected to the inner end of the throttling filter cartridge (3). The flow channels between the piston (4), the valve body (1), and the inner housing (2) are adapted to each other.

2. The piston flow control pressure control valve according to claim 1, characterized in that: The drive assembly (6) includes a valve shaft (8), a screw (9) and a guide post (10). The throttling filter cartridge (3) is slidably connected to the guide post (10). The guide post (10) is installed inside the inner housing (2). The screw (9) is rotatably installed inside the inner housing (2). The throttling filter cartridge (3) is threadedly connected to the screw (9). The valve shaft (8) is rotatably installed on the valve body (1). The inner end of the valve shaft (8) is connected to the screw (9) through a bevel gear pair.

3. The piston flow control pressure control valve of claim 1, wherein: The throttling filter cartridge (3) is divided into a filtration section and a sealing section in sequence along the flow direction by a partition (11).

4. The piston flow control pressure control valve of claim 3, wherein: The length of the filter section is not less than the length of the flow channel.

5. The piston flow control pressure control valve of claim 4, wherein: The filter section is provided with multiple filter holes.

6. Piston flow and pressure regulating valve according to any of claims 4 or 5, characterized in that: The filter section has multiple filter holes with gradually increasing diameters arranged along its axial direction.

7. The piston flow control pressure control valve of claim 3, wherein: The stop block (7) is located on the sealing part, and the shortest distance between the stop block (7) and the filter part is not less than the length of the filter part.

8. The piston flow control pressure control valve of claim 1, wherein: A sealing ring is provided between the throttling filter cartridge (3) and the piston (4).

Images