A high-reliability pressure controller

Abstract

This utility model discloses a high-reliability pressure controller, including a housing. The lower end of the housing has a low-pressure interface structure and a high-pressure interface structure. The low-pressure interface structure includes a fixing block with a downward-facing groove on its upper end and a horizontal protrusion on its upper end. The protrusion has threads on its outer side for threaded connection with the housing. The lower end of the fixing block also has a connecting part. Vertical channels are provided on the connecting part and the fixing block. A positioning plate is provided within the groove, and the positioning plate is used to connect with a bellows. This utility model reduces the possibility of sealing gaps when the bellows is placed on the housing by providing a groove in the low-pressure interface structure, thus improving the overall structural stability. Simultaneously, the bellows being placed on the positioning plate allows for convenient disassembly and replacement, offering better convenience compared to welding the bellows to the housing.

Description

Technical Field

[0001] This utility model relates to the field of pressure controller technology, specifically a high-reliability pressure controller. Background Technology

[0002] Existing pressure controllers, such as those shown in Chinese Utility Model Patent Application No. 202323226275.0, achieve pressure control through a bellows, a lever plate, and a micro-switch assembly. The lower end of the bellows is connected to the housing, and the upper end is connected to the lever assembly. During operation, the inflow and outflow of media through the low-pressure and high-pressure inlets causes the bellows to move, thus activating the micro-switch assembly and achieving pressure control. However, in this structure, the bellows is connected to the housing, which can lead to leakage at the low-pressure and high-pressure inlets, indicating room for improvement. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of the aforementioned background technology by providing a pressure controller that improves the sealing stability of bellows connections.

[0004] To achieve the above objectives, this utility model provides a high-reliability pressure controller, which adopts the following technical solution: A high-reliability pressure controller includes a housing. The lower end of the housing has a low-pressure interface structure and a high-pressure interface structure. The low-pressure interface structure includes a fixing block. The upper end of the fixing block has a groove facing downwards, and the upper end of the fixing block has a horizontal protrusion facing outwards. The outer side of the protrusion has a thread for threaded connection with the housing. The lower end of the fixing block also has a connecting part. The connecting part and the fixing block have vertical channels. The groove has a positioning plate for connection with a bellows.

[0005] A further improvement of this utility model of a high-reliability pressure controller is that the positioning plate has a through-hole at the center, and the cross-sectional area of ​​the through-hole is larger than the cross-sectional area of ​​the channel.

[0006] A further improvement of this utility model of a high-reliability pressure controller is that the positioning plate has an inverted T-shaped cross-section, including a horizontal bottom and a vertical part. The side wall of the vertical part is connected to the bellows. The edge of the horizontal bottom abuts against the groove wall. A through groove is provided on the horizontal bottom. A threaded groove is provided at the bottom of the groove. A bolt is provided at the through groove and connected to the threaded groove.

[0007] A further improvement of this utility model of a high-reliability pressure controller is that the bottom of the groove is provided with an annular groove facing downwards, and the horizontal bottom is provided with an annular protrusion that inserts into the annular groove.

[0008] A further improvement of this utility model of a high-reliability pressure controller is that a fixing pad is provided in the annular groove, and the annular protrusion abuts against the fixing pad.

[0009] Compared with the prior art, the beneficial effects of this utility model are: This invention provides a groove in the low-pressure interface structure for arranging the bellows, reducing the possibility of sealing gaps when the bellows is placed on the shell and improving the stability of the overall structure. At the same time, the bellows are arranged on the positioning plate, which can also be easily disassembled and replaced, which is more convenient than welding the bellows to the shell. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the low-voltage interface structure of this utility model; In the diagram: 1. Housing, 2. Low-pressure interface structure, 3. High-pressure interface structure, 4. Fixing block, 5. Groove, 6. Protrusion, 7. Connecting part, 8. Channel, 9. Horizontal bottom, 10. Vertical part, 11. Notch, 12. Bolt, 13. Annular groove. Detailed Implementation

[0011] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0012] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0013] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0015] like Figure 1 and Figure 2 As shown, a high-reliability pressure controller includes a housing 1. The lower end of the housing has a low-pressure interface structure 2 and a high-pressure interface structure 3. Specifically, the low-pressure interface structure includes a fixing block 4. The upper end of the fixing block has a downward-facing groove 5, and the upper end of the fixing block has a horizontal protrusion 6 extending outwards. The outer side of the protrusion has threads for threaded connection with the housing. The lower end of the fixing block also has a connecting part 7. The connecting part and the fixing block have vertical channels 8. A positioning plate is provided in the groove, and the positioning plate is used for connection with a bellows. The structure of the connecting part can be the same as that of existing pressure controllers.

[0016] Furthermore, the positioning plate has a through-hole 11 at its center, with the cross-sectional area of ​​the through-hole being larger than that of the channel.

[0017] Furthermore, the positioning plate has an inverted T-shaped cross-section, including a horizontal bottom 9 and a vertical part 10. The sidewall of the vertical part is connected to the corrugated pipe, and the connection method can be welding or clamp connection. The edge of the horizontal bottom abuts against the groove wall, and a through groove is provided on the horizontal bottom. A threaded groove is provided at the bottom of the groove, and a bolt 12 is provided at the through groove, with the bolt connected to the threaded groove.

[0018] Furthermore, the groove has an annular groove 13 at its bottom facing downwards, and an annular protrusion at its horizontal bottom that inserts into the annular groove. A fixing gasket is provided inside the annular groove, and the annular protrusion abuts against the fixing gasket. This further improves the sealing performance.

[0019] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A high-reliability pressure controller, characterized in that, The device includes a housing. The lower end of the housing is provided with a low-pressure interface structure and a high-pressure interface structure. The low-pressure interface structure includes a fixing block. The upper end of the fixing block has a groove facing downwards. The upper end of the fixing block has a horizontal protrusion facing outwards. The outer side of the protrusion has a thread for threaded connection with the housing. The lower end of the fixing block is also provided with a connecting part. The connecting part and the fixing block have vertical channels. The groove is provided with a positioning plate for connection with a bellows.

2. The high-reliability pressure controller according to claim 1, characterized in that, The positioning plate has a through-hole at its center, and the cross-sectional area of ​​the through-hole is larger than that of the channel.

3. A high-reliability pressure controller according to claim 2, characterized in that, The positioning plate has an inverted T-shaped cross section, including a horizontal bottom and a vertical part. The side wall of the vertical part is connected to the corrugated pipe. The edge of the horizontal bottom abuts against the groove wall. A through groove is provided on the horizontal bottom. A threaded groove is provided at the bottom of the groove. A bolt is provided at the through groove and connected to the threaded groove.

4. A high-reliability pressure controller according to claim 3, characterized in that, The groove has an annular groove at the bottom and an annular protrusion at the horizontal bottom that is inserted into the annular groove.

5. A high-reliability pressure controller according to claim 4, characterized in that, A fixing pad is provided inside the annular groove, and the annular protrusion abuts against the fixing pad.

Images