A dirt-resistant threaded differential pressure transmitter

Abstract

The utility model relates to differential pressure transmitter technical field discloses an anti -pollution type screw thread formula differential pressure transmitter, including an anti -pollution type screw thread formula differential pressure transmitter, including the transmitter pipe body, the transmitter pipe body outer wall one side is provided with the oil inlet pipe, the oil inlet pipe outer wall is provided with the outer thread, the transmitter pipe body outer wall other side is provided with the controller, the controller outer wall one side is provided with the oil outlet pipe, the transmitter pipe body inner wall is provided with the anti -pollution subassembly, the transmitter pipe body and the controller inner wall are provided with the mounting assembly, the anti -pollution subassembly includes the anti -pollution pressure frame, the anti -pollution pressure frame sliding connection is in the transmitter pipe body inner wall. In the utility model, when installing, the anti -pollution pressure frame embeds the transmitter pipe body with the controller, extrudes the seal of the dirt -stopping ring, and the elastic sheet promotes the dirt -stopping ring and the sealing gasket to be closely attached, and the reinforcing plate reinforces the connection, improves the anti -pollution performance, reaches the effective improvement anti -pollution ability, guarantees the stable operation of equipment, prolongs the service life.

Description

Technical Field

[0001] This utility model relates to the field of differential pressure transmitter technology, and in particular to a contamination-resistant threaded differential pressure transmitter. Background Technology

[0002] Differential pressure transmitters, as key monitoring components in hydraulic, lubrication, and other fluid systems, are primarily used to detect the pressure difference across a filter. When filter element blockage causes the pressure difference to exceed a set value, a signal is emitted to remind operators to replace the filter element promptly, ensuring the normal operation of the system. Threaded differential pressure transmitters are widely used in industrial fields due to their convenient installation and stable connection. With increasingly complex industrial production environments, higher requirements are being placed on the anti-fouling performance of these transmitters.

[0003] Traditional threaded differential pressure transmitters primarily rely on simple sealing rings for sealing. Their mechanical structure typically consists of a transmitter tube, an inlet pipe, an outlet pipe, and a controller. The sealing rings maintain a seal at the connection between the transmitter tube and the controller, while a pressure sensing element monitors changes in pressure difference. When the system is running, fluid enters the transmitter through the inlet pipe, passes through the controller, and flows out through the outlet pipe. The pressure sensing element triggers an alarm signal based on the pressure difference between the two ends.

[0004] However, the sealing structure of traditional differential pressure transmitters has significant defects. The sealing rings are prone to aging and deformation under complex operating conditions, leading to poor sealing and allowing external contaminants to easily enter the transmitter, causing oil leakage. Furthermore, during long-term use, impurities entering the sealing gaps accelerate the wear of the sealing rings, further reducing sealing performance, affecting the transmitter's monitoring accuracy, easily causing system failures, shortening equipment lifespan, and making it difficult to meet the stable operation requirements in highly polluted environments. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a contamination-resistant threaded differential pressure transmitter, which aims to improve the problems of traditional differential pressure transmitters being susceptible to external contaminant intrusion and oil leakage due to poor sealing.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a contamination-resistant threaded differential pressure transmitter, comprising a transmitter tube body, an oil inlet pipe provided on one side of the outer wall of the transmitter tube body, an external thread provided on the outer wall of the oil inlet pipe, a controller provided on the other side of the outer wall of the transmitter tube body, an oil outlet pipe provided on one side of the outer wall of the controller, an anti-contamination component provided on the inner wall of the transmitter tube body, and an installation component provided on the inner wall of the transmitter tube body and the controller.

[0007] The anti-fouling component includes an anti-fouling pressure frame, which is slidably connected to the inner wall of the transmitting tube. An anti-fouling groove is formed on the inner wall of the transmitting tube. A sealing gasket is fixedly connected to the inner wall of the anti-fouling groove. An elastic sheet is attached to the outer wall of the sealing gasket. A dirt-blocking ring is attached to the outer wall of the elastic sheet. A reinforcing plate is fixedly connected to the outer wall of the oil outlet pipe.

[0008] Furthermore, the mounting assembly includes a connecting rod, the outer wall of which is threadedly connected to the transmitting tube body and the inner wall of the controller. Both the transmitting tube body and the inner wall of the controller have mounting holes. The inner wall of the transmitting tube body has a positioning groove. A positioning plate is fixedly connected to one side of the outer wall of the controller. An anti-drop cylinder is fixedly connected to one end of the connecting rod. An expansion ring is provided on the inner wall of the anti-drop cylinder. A screw is fixedly connected to the inner wall of the anti-drop cylinder, and a nut is threadedly connected to the outer wall of the screw. A compression plate is slidably connected to the inner wall of the anti-drop cylinder.

[0009] Furthermore, the inner wall of the extrusion plate is slidably connected to the outer wall of the screw, and the extrusion plate is used to extrude the expansion ring.

[0010] Furthermore, the lower surface of the nut is attached to the outer wall of the extrusion plate, and the nut is used to push the extrusion plate.

[0011] Furthermore, the outer wall of the connecting rod is threaded into the mounting hole, and the connecting rod is used to connect the transmitting tube body and the controller.

[0012] Furthermore, the outer wall of the positioning plate is slidably connected to the inside of the positioning groove, and the controller is used to push the anti-fouling pressure frame to squeeze the dirt-blocking ring.

[0013] Furthermore, the sealing gasket is disposed inside the anti-fouling groove, and the dirt-blocking ring is disposed inside the transmitting tube body.

[0014] Furthermore, the elastic sheet is used to push the dirt-blocking ring and the sealing gasket to move.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, during installation, the anti-pollution pressure frame is embedded into the transmitter tube along with the controller, squeezing the anti-pollution ring for sealing. The elastic sheet pushes the anti-pollution ring to fit tightly with the sealing gasket, and the reinforcing plate strengthens the connection, thereby improving the anti-pollution performance. This solves the problems of poor sealing of traditional differential pressure transmitters, which are easily invaded by external pollutants and leak oil. It effectively improves the anti-pollution capability, ensures stable operation of the equipment, and extends its service life.

[0017] 2. In this utility model, the controller is aligned with the positioning groove of the signal tube body by the positioning plate, the connecting rod is threaded and fastened, and the rotating nut squeezes the expansion ring to expand and press against the inner wall, so as to achieve anti-loosening and fixation, thereby ensuring the accurate installation of the sealing component and enhancing the overall connection reliability and stability. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an anti-fouling threaded differential pressure transmitter proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the controller section of an anti-fouling threaded differential pressure transmitter proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the oil inlet pipe section of an anti-fouling threaded differential pressure transmitter proposed in this utility model;

[0021] Figure 4 This is a schematic diagram of the anti-fouling pressure frame of an anti-fouling threaded differential pressure transmitter proposed in this utility model;

[0022] Figure 5 This is a schematic diagram of the expansion ring structure of an anti-fouling threaded differential pressure transmitter proposed in this utility model.

[0023] Legend:

[0024] 1. Transmitter tube body; 2. Controller; 3. Oil outlet pipe; 4. Oil inlet pipe; 5. External thread; 6. Reinforcing plate; 7. Anti-drop cylinder; 8. Mounting hole; 9. Positioning groove; 10. Positioning plate; 11. Anti-fouling pressure frame; 12. Fouling ring; 13. Elastic sheet; 14. Sealing gasket; 15. Connecting rod; 16. Screw; 17. Extrusion plate; 18. Nut; 19. Expansion ring; 20. Anti-fouling groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figures 1-4 An embodiment of this utility model is provided: a contamination-resistant threaded differential pressure transmitter, including a transmitter tube body 1, an oil inlet pipe 4 is provided on one side of the outer wall of the transmitter tube body 1, an external thread 5 is provided on the outer wall of the oil inlet pipe 4, a controller 2 is provided on the other side of the outer wall of the transmitter tube body 1, an oil outlet pipe 3 is provided on one side of the outer wall of the controller 2, an anti-contamination component is provided on the inner wall of the transmitter tube body 1, and mounting components are provided on the inner walls of the transmitter tube body 1 and the controller 2.

[0027] The anti-fouling component includes an anti-fouling pressure frame 11, which is slidably connected to the inner wall of the transmitter tube 1. An anti-fouling groove 20 is provided on the inner wall of the transmitter tube 1. A sealing gasket 14 is fixedly connected to the inner wall of the anti-fouling groove 20. An elastic sheet 13 is attached to the outer wall of the sealing gasket 14. A dirt-blocking ring 12 is attached to the outer wall of the elastic sheet 13. A reinforcing plate 6 is fixedly connected to the outer wall of the oil outlet pipe 3.

[0028] Specifically, during installation, the anti-fouling pressure frame 11 is embedded inside the transmitter tube 1 along with the controller 2, compressing the anti-fouling ring 12 to fit against the inner wall of the transmitter tube 1, forming a preliminary seal. The sealing gasket 14 and the elastic sheet 13 in the anti-fouling groove 20 work together, with the elastic sheet 13 continuously providing elastic force to push the anti-fouling ring 12 into close contact with the sealing gasket 14, further enhancing the sealing performance. At the same time, the reinforcing plate 6 reinforces the connection between the oil outlet pipe 3 and the controller 2.

[0029] Reference Figures 1-5 The mounting assembly includes a connecting rod 15, whose outer wall is threaded to the inner wall of the transmitter tube 1 and the controller 2. Both the transmitter tube 1 and the controller 2 have mounting holes 8 on their inner walls. The transmitter tube 1 has a positioning groove 9 on its inner wall. A positioning plate 10 is fixedly connected to one side of the outer wall of the controller 2. An anti-drop cylinder 7 is fixedly connected to one end of the connecting rod 15. An expansion ring 19 is provided on the inner wall of the anti-drop cylinder 7. A screw 16 is fixedly connected to the inner wall of the anti-drop cylinder 7. A nut 18 is threaded onto the outer wall of the screw 16. A compression plate 17 is slidably connected to the inner wall of the anti-drop cylinder 7. The compression plate 17 is slidably connected to... The screw 16 is attached to the outer wall of the extrusion plate 17, which is used to extrude the expansion ring 19. The lower surface of the nut 18 is attached to the outer wall of the extrusion plate 17, and the nut 18 is used to push the extrusion plate 17. The outer wall of the connecting rod 15 is threaded into the mounting hole 8, and the connecting rod 15 is used to connect the signal tube body 1 and the controller 2. The outer wall of the positioning plate 10 is slidably connected into the positioning groove 9, and the controller 2 is used to push the anti-fouling pressure frame 11 to extrude the dirt-blocking ring 12. The sealing gasket 14 is set inside the anti-fouling groove 20, and the dirt-blocking ring 12 is set inside the signal tube body 1. The elastic plate 13 is used to push the dirt-blocking ring 12 and the sealing gasket 14 to move.

[0030] Specifically, the controller 2 slides into the positioning groove 9 of the transmitter tube 1 via the positioning plate 10, ensuring that the anti-fouling pressure frame 11 and the dirt-blocking ring 12 are accurately aligned. The connecting rod 15 passes through the mounting hole 8 of the transmitter tube 1 and the controller 2 and is threaded and fastened to achieve the connection between the two. The rotating nut 18 moves along the screw 16, pushing the extrusion plate 17 to extrude the expansion ring 19, causing it to expand radially and press against the inner wall of the mounting hole 8.

[0031] Working principle: When an anti-fouling threaded differential pressure transmitter is required, the anti-fouling pressure frame 11 is embedded inside the transmitter tube 1 when the controller 2 is installed, squeezing the anti-fouling ring 12 to make it fit tightly inside the transmitter tube 1, preventing external contaminants from entering. The sealing gasket 14 and the elastic sheet 13 in the anti-fouling groove 20 work together, and the elastic sheet 13 provides continuous elastic force, pushing the anti-fouling ring 12 and the sealing gasket 14 to maintain tight contact, enhancing the sealing effect, preventing oil leakage and impurities from entering. The reinforcing plate 6 strengthens the connection between the oil outlet pipe 3 and the controller 2, improves structural stability, and reduces the risk of sealing failure caused by vibration or pressure fluctuations.

[0032] In addition, the controller 2 slides into the positioning groove 9 of the transmitter tube 1 through the positioning plate 10 to ensure that the anti-pollution pressure frame 11 and the dirt-blocking ring 12 are accurately aligned. The connecting rod 15 passes through the mounting hole 8 of the transmitter tube 1 and the controller 2 and is threaded and fastened to realize the connection between the transmitter tube 1 and the controller 2. The nut 18 is rotated to move along the screw 16, pushing the extrusion plate 17 to squeeze the expansion ring 19, so that it expands radially and presses against the inner wall of the mounting hole 8 to form an anti-loosening locking effect and prevent the connecting rod 15 from loosening due to vibration.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A contamination-resistant threaded differential pressure transmitter, comprising a transmitter tube (1), characterized in that: An oil inlet pipe (4) is provided on one side of the outer wall of the signal tube body (1), and an external thread (5) is provided on the outer wall of the oil inlet pipe (4). A controller (2) is provided on the other side of the outer wall of the signal tube body (1), and an oil outlet pipe (3) is provided on one side of the outer wall of the controller (2). An anti-fouling component is provided on the inner wall of the signal tube body (1), and an installation component is provided on the inner walls of the signal tube body (1) and the controller (2). The anti-fouling component includes an anti-fouling pressure frame (11), which is slidably connected to the inner wall of the signal transmitting tube (1). The inner wall of the signal transmitting tube (1) is provided with an anti-fouling groove (20). A sealing gasket (14) is fixedly connected to the inner wall of the anti-fouling groove (20). An elastic sheet (13) is attached to the outer wall of the sealing gasket (14). A dirt-blocking ring (12) is attached to the outer wall of the elastic sheet (13). A reinforcing plate (6) is fixedly connected to the outer wall of the oil outlet pipe (3).

2. The anti-fouling threaded differential pressure transmitter according to claim 1, characterized in that: The installation assembly includes a connecting rod (15), the outer wall of which is threaded to the inner wall of the transmitting tube (1) and the controller (2). The inner walls of the transmitting tube (1) and the controller (2) are provided with mounting holes (8). The inner wall of the transmitting tube (1) is provided with a positioning groove (9). A positioning plate (10) is fixedly connected to one side of the outer wall of the controller (2). One end of the connecting rod (15) is fixedly connected to an anti-drop cylinder (7). An expansion ring (19) is provided on the inner wall of the anti-drop cylinder (7). A screw (16) is fixedly connected to the inner wall of the anti-drop cylinder (7). A nut (18) is threaded to the outer wall of the screw (16). An extrusion plate (17) is slidably connected to the inner wall of the anti-drop cylinder (7).

3. The anti-fouling threaded differential pressure transmitter according to claim 2, characterized in that: The inner wall of the extrusion plate (17) is slidably connected to the outer wall of the screw (16), and the extrusion plate (17) is used to extrude the expansion ring (19).

4. The anti-fouling threaded differential pressure transmitter according to claim 2, characterized in that: The lower surface of the nut (18) is attached to the outer wall of the extrusion plate (17), and the nut (18) is used to push the extrusion plate (17).

5. A pollution-resistant threaded differential pressure transmitter according to claim 2, characterized in that: The outer wall of the connecting rod (15) is threaded into the mounting hole (8), and the connecting rod (15) is used to connect the transmitting tube body (1) and the controller (2).

6. The anti-fouling threaded differential pressure transmitter according to claim 2, characterized in that: The outer wall of the positioning plate (10) is slidably connected to the inside of the positioning groove (9), and the controller (2) is used to push the anti-fouling pressure frame (11) to squeeze the dirt-blocking ring (12).

7. The anti-fouling threaded differential pressure transmitter according to claim 1, characterized in that: The sealing gasket (14) is disposed inside the anti-fouling groove (20), and the anti-fouling ring (12) is disposed inside the transmitting tube body (1).

8. The anti-fouling threaded differential pressure transmitter according to claim 1, characterized in that: The elastic sheet (13) is used to push the dirt-blocking ring (12) and the sealing gasket (14) to move.

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