A current limiting structure for a pressure transmitter

Abstract

This utility model relates to the field of pressure transmitter technology, and in particular to a flow-limiting structure for a pressure transmitter. It includes a gasifier, a connection port on the outside of the gasifier, a shut-off valve at the outer end of the connection port, and a connecting plate at the other end of the shut-off valve. An opening is formed on the outer side of the connecting plate, and a limiting component is provided on the outer side of the opening. This utility model exposes the opening by rotating a rotating ring, facilitating the installation or removal of the flow-limiting plate. When the flow-limiting plate needs to be fixed, the rotating ring can be rotated inward to engage the locking block with the locking slot, aligning the first and second fixing blocks. Then, the fixing rod inside the second fixing block is pulled into the first fixing block. Rotating the cam handle drives the cam to rotate. When the cam rotates to a certain angle, its shape presses against the first fixing block, fixing the second and first fixing blocks together and thus securing the flow-limiting plate inside the rotating ring. This structure is simple in design and easy to operate.

Description

Technical Field

[0001] This utility model relates to the field of pressure transmitter technology, and in particular to a current limiting structure for pressure transmitters. Background Technology

[0002] In the coal chemical industry, the gasifier is the core equipment, while the pressure transmitter is the key instrument ensuring its safe, stable, and efficient operation. The relationship between them is crucial. The gasifier is the main equipment that converts coal into syngas through a series of complex physicochemical reactions under high temperature, high pressure, and a specific atmosphere. Syngas is the raw material for producing downstream products such as synthetic ammonia, methanol, liquid fuels, hydrogen, natural gas, and power generation. The pressure transmitter is an instrument that converts the pressure signal of a gas or liquid into a standard electrical signal output. In the gasifier, it undertakes multiple critical missions, such as process monitoring and operation control, safety interlock protection, and process optimization and efficiency improvement.

[0003] In existing technologies, high temperature and high pressure conditions can impact the single-flange pressure transmitter that measures pressure, thereby damaging the diaphragm sealing surface and reducing the transmitter's service life. Therefore, there is an urgent need for a flow-limiting structure for pressure transmitters that can reduce direct impact on the transmitter flange diaphragm and extend the transmitter's service life. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing the following technical solution:

[0005] A flow limiting structure for a pressure transmitter includes a gasifier, a connection port is provided on the outside of the gasifier, a shut-off valve is provided at the outer end of the connection port, a connecting plate is provided at the other end of the shut-off valve, an opening is provided on the outside of the connecting plate, and a limit component is provided on the outside of the opening.

[0006] As an improvement to the above technical solution, the limiting component includes a first rotating shaft disposed on the inner side of one end of the opening, a rotating ring disposed on the outer side of the first rotating shaft, a first fixing block disposed on the other end of the rotating ring, and a locking block disposed on the inner side of the rotating ring.

[0007] As an improvement to the above technical solution, a slot is provided inside the opening.

[0008] As an improvement to the above technical solution, a second fixing block is provided at the other end of the opening, a fixing rod is rotatably connected inside the second fixing block, the other end of the fixing rod is provided inside a second rotating shaft, the second rotating shaft is provided inside a cam, and a cam handle is provided on the outside of the cam.

[0009] As an improvement to the above technical solution, a flow-limiting component is provided inside the opening.

[0010] As an improvement to the above technical solution, the current limiting component includes a first current limiting plate, a groove is provided on one side of the first current limiting plate, and a plurality of first current limiting holes are provided in the groove.

[0011] As an improvement to the above technical solution, a matching second flow limiting plate is provided in the groove, a plurality of second flow limiting holes are provided in the second flow limiting plate, a plurality of scraper layers are provided in the second flow limiting holes, and a matching deformation ring is provided on the outside of the second flow limiting holes.

[0012] The beneficial effects of this utility model are:

[0013] 1. By rotating the first fixed block, the rotating ring is exposed, revealing an opening that matches the rotating ring. The locking block inside the rotating ring and the locking groove inside the opening cooperate to ensure the airtightness between the rotating ring and the connecting plate. After the opening is exposed, it is convenient to install or remove the flow limiting plate. When it is necessary to fix the flow limiting plate, the rotating ring can be rotated inward to make the locking block engage with the locking groove. Then, the first fixed block at one end of the rotating ring and the second fixed block at the other end of the opening are aligned. Then, the fixing rod inside the second fixed block is pulled into the first fixed block. By rotating the cam handle, the cam is driven to rotate. When the cam rotates to a certain angle, its shape will press against the first fixed block, so that the second fixed block and the first fixed block are fixed together, thereby fixing the flow limiting plate inside the rotating ring. This structure is simple in design and easy to operate.

[0014] 2. The transmitter flange diaphragm is protected by a flow-limiting plate composed of a first flow-limiting plate and a second flow-limiting plate stacked together. The second flow-limiting hole in the outermost second flow-limiting plate is a tapered hole with the outer side decreasing in size, which performs the first step of pressure reduction. The first flow-limiting hole in the inner first flow-limiting plate is a normal through hole, which is used for precise flow restriction. At the same time, the scraper layer set in the second flow-limiting hole generates local turbulence when the fluid flows through, destroys the deposit adhesion layer, and has a certain self-cleaning effect. The deformation ring on the outside of the second flow-limiting hole is made of a different material than the second flow-limiting plate. When the temperature changes, the two materials of the deformation ring and the second flow-limiting plate expand or contract to different degrees, which can partially offset the changes in the orifice diameter caused by temperature, so as to maintain a more constant flow area. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the limiting component in this utility model;

[0017] Figure 3 for Figure 4 Enlarged view of point A in the image;

[0018] Figure 4This is a schematic diagram of the structure of the first flow-limiting orifice in this utility model.

[0019] Reference numerals in the attached drawings: 1. Gasifier; 2. Connection port; 3. Shut-off valve; 4. Connecting plate; 5. Opening; 6. Rotating ring; 7. Locking block; 8. First rotating shaft; 9. First fixing block; 10. Locking groove; 11. Second fixing block; 12. Cam; 13. Fixing rod; 14. Cam handle; 15. Second rotating shaft; 16. First flow limiting plate; 17. Groove; 18. First flow limiting hole; 19. Second flow limiting plate; 20. Second flow limiting hole; 21. Scraper layer; 22. Deformation ring. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the following provides a more detailed description of the utility model. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the utility model.

[0021] Please refer to Figures 1-4 A flow limiting structure for a pressure transmitter includes a gasifier 1, a connection port 2 on the outside of the gasifier 1, a shut-off valve 3 at the outer end of the connection port 2, a connecting plate 4 at the other end of the shut-off valve 3, an opening 5 on the outside of the connecting plate 4, and a limit component on the outside of the opening 5.

[0022] Specifically, the gasifier 1 and the shut-off valve 3 are connected to each other through the connection port 2. The gasifier 1 and the shut-off valve 3 are existing technologies and will not be described in detail. The flow limiting plate in the opening 5 is limited and fixed by the limiting component.

[0023] Please refer to Figures 1-4 The limiting component includes a first rotating shaft 8 disposed inside one end of the opening 5, a rotating ring 6 disposed outside the first rotating shaft 8, a first fixing block 9 disposed at the other end of the rotating ring 6, a locking block 7 disposed inside the rotating ring 6, a locking groove 10 disposed inside the opening 5, a second fixing block 11 disposed at the other end of the opening 5, a fixing rod 13 rotatably connected inside the second fixing block 11, the other end of the fixing rod 13 disposed inside the second rotating shaft 15, the second rotating shaft 15 disposed inside the cam 12, and a cam handle 14 disposed outside the cam 12.

[0024] Specifically, by driving the first fixing block 9 to rotate the rotating ring 6, an opening 5 that matches the rotating ring 6 is exposed. The locking block 7 on the inner side of the rotating ring 6 and the locking groove 10 on the inner side of the opening 5 cooperate to ensure the airtightness between the rotating ring 6 and the connecting plate 4. Exposing the opening 5 facilitates the installation or removal of the flow limiting plate. When it is necessary to fix the flow limiting plate, the rotating ring 6 can be rotated inward to make the locking block 7 engage with the locking groove 10. Then, the first fixing block 9 at one end of the rotating ring 6 and the second fixing block 11 at the other end of the opening 5 are aligned. Then, the fixing rod 13 in the second fixing block 11 is pulled into the first fixing block 9. Both the first fixing block 9 and the second fixing block 11 are U-shaped structures. By rotating the cam handle 14, the cam 12 is driven to rotate. When the cam 12 rotates to a certain angle, its shape will press against the first fixing block 9, so that the second fixing block 11 and the first fixing block 9 are fixed together, thereby fixing the flow limiting plate inside the rotating ring 6. This structure is simple in design and easy to operate.

[0025] Please refer to Figures 1-4 A flow-limiting component is installed inside opening 5.

[0026] Specifically, the current limiting component is a detachable structure that can be replaced at any time according to usage, ensuring normal equipment operation and preventing damage.

[0027] Please refer to Figures 1-4 The flow limiting component includes a first flow limiting plate 16, a groove 17 is provided on one side of the first flow limiting plate 16, a plurality of first flow limiting holes 18 are provided in the groove 17, a matching second flow limiting plate 19 is provided in the groove 17, a plurality of second flow limiting holes 20 are provided in the second flow limiting holes 20, a plurality of scraper layers 21 are provided in the second flow limiting holes 20, and a matching deformation ring 22 is provided on the outside of the second flow limiting holes 20.

[0028] Specifically, the transmitter flange diaphragm is protected by a flow-limiting assembly consisting of a first flow-limiting plate 16 and a second flow-limiting plate 19 stacked together. The second flow-limiting plate 19 is installed in a groove 17 outside the first flow-limiting plate 16. The second flow-limiting hole 20 in the outermost second flow-limiting plate 19 has a tapered hole structure that decreases in size from the outside to the inside, which is used for the first step of pressure reduction. The first flow-limiting hole 18 in the inner first flow-limiting plate 16 is a normal through hole, and the size of the through hole is consistent with the size of the small hole side of the tapered hole, which is used for precise flow restriction. At the same time, the scraper layer 21 set in the second flow-limiting hole 20 generates local turbulence when the fluid flows through, destroying the deposit adhesion layer and having a certain self-cleaning effect. The deformation ring 22 outside the second flow-limiting hole 20 is made of a different material than the second flow-limiting plate 19. When the temperature changes, the deformation ring 22 and the second flow-limiting plate 19 expand or contract to different degrees, which can partially offset the changes in orifice diameter caused by temperature, so as to maintain a more constant flow area.

[0029] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A flow-limiting structure for a pressure transmitter, comprising a gasifier (1), wherein a connection port (2) is provided on the outer side of the gasifier (1), and a shut-off valve (3) is provided at the outer end of the connection port (2), characterized in that: The other end of the shut-off valve (3) is provided with a connecting plate (4), and an opening (5) is provided on the outside of the connecting plate (4), and a limit component is provided on the outside of the opening (5).

2. The current-limiting structure for a pressure transmitter according to claim 1, characterized in that: The limiting component includes a first rotating shaft (8) disposed on the inner side of one end of the opening (5), a rotating ring (6) disposed on the outer side of the first rotating shaft (8), a first fixing block (9) disposed on the other end of the rotating ring (6), and a locking block (7) disposed on the inner side of the rotating ring (6).

3. The current-limiting structure for a pressure transmitter according to claim 1, characterized in that: A slot (10) is provided inside the opening (5).

4. The current-limiting structure for a pressure transmitter according to claim 2, characterized in that: The other end of the opening (5) is provided with a second fixing block (11), and a fixing rod (13) is rotatably connected inside the second fixing block (11). The other end of the fixing rod (13) is provided inside the second rotating shaft (15), and the second rotating shaft (15) is provided inside the cam (12). A cam handle (14) is provided on the outside of the cam (12).

5. The current-limiting structure for a pressure transmitter according to claim 1, characterized in that: A flow-limiting component is provided inside the opening (5).

6. The current-limiting structure for a pressure transmitter according to claim 5, characterized in that: The current limiting component includes a first current limiting plate (16), a groove (17) is provided on one side of the first current limiting plate (16), and a plurality of first current limiting holes (18) are provided in the groove (17).

7. The current-limiting structure for a pressure transmitter according to claim 6, characterized in that: The groove (17) is provided with a matching second flow limiting plate (19), the second flow limiting plate (19) is provided with a plurality of second flow limiting holes (20), the second flow limiting holes (20) are provided with a plurality of scraper layers (21), and the second flow limiting holes (20) are provided with a matching deformation ring (22) on the outside.

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