Pressure transmitter suitable for gas

Abstract

The utility model relates to a pressure transmitter suitable for gas, which comprises a pressure transmitter main body, a display screen, a ventilation pipeline, a pressure relief device and a filter device, the front side of the pressure transmitter main body is provided with the display screen, the lower part of the pressure transmitter main body is connected with the ventilation pipeline, the right side of the ventilation pipeline is connected with the pressure relief device, the pressure relief device is provided with an air outlet hole, and the filter device is provided with a filter screen. Handles are arranged on the left side and the right side of the filtering device respectively, and filtering baffles are arranged below the handles. And through secondary sealing of a rubber ring on the filter baffle, a rubber ring in a filter plate insertion hole, a plugging block and a plugging groove, it is ensured that gas cannot leak. The filtering baffle can be cleaned and replaced through the handle, and the gas is filtered, so that the gas is purer and the measurement is more accurate. And the pressure relief effect can be achieved through the combined action of a spring, a baffle, a vent hole, a contraction plate, a fixing plate and an air outlet hole, and potential safety hazards caused by too large pressure are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure transmitters, and in particular relates to a pressure transmitter suitable for gas. Background Art

[0002] A pressure transmitter is an instrument used to measure the pressure of liquid or gas, converting the pressure into an electrical signal output. Its function is to convert the pressure signal into a standard signal for processing and control in an automatic control system. The working principle of the pressure transmitter is to use the piezoresistive effect or the capacitive effect to measure the pressure, and then convert the pressure into a standard electrical signal output.

[0003] Sometimes large particles are mixed in the gas, which affects the accuracy of the measured data. Large particles enter the transmitter, which makes subsequent cleaning and maintenance more troublesome. At the same time, in the case of excessive pressure, the pressure transmitter cannot achieve self-discharge.

[0004] Chinese patent CN219161533U discloses a pressure transmitter with a pressure relief device, including a pressure transmitter, a first connecting pipe is installed on the outer surface of the pressure transmitter, a mounting box is fixedly installed on the outer surface of the first connecting pipe, a second connecting pipe is fixedly installed on the outer surface of the mounting box, a partition is fixedly installed between the inner side walls of the mounting box, and the inner left and right side walls of the mounting box are movably connected with guide plates. When the pressure is too high, the gas entering the mounting box will push the two guide plates to rotate toward the inner wall of the mounting box. The mounting box pulls the baffle through the connecting belt and moves upward along the direction of the telescopic part to open the through hole. The gas enters the pressure relief pipe through the through hole and is then discharged, which has the effect of pressure relief. Through the set alarm, it has the effect of alarming to alert the staff. However, this pressure relief device is connected to the outside of the transformer and takes up a lot of space.

[0005] In summary, the prior art has the problems of large particle impurities affecting the measurement results, inconvenient subsequent cleaning, and no emergency pressure relief device or inconvenient external use of the pressure relief device when the pressure is too high. Utility Model Content

[0006] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0007] Therefore, the purpose of the utility model is to provide a pressure transmitter suitable for gas, which can solve the problems of the prior art that large particles of impurities affect the measurement results, the inconvenience of subsequent cleaning, and the lack of emergency pressure relief devices when the pressure is too high or the inconvenience of using the pressure relief devices externally. In order to solve the above technical problems, the utility model provides a pressure transmitter suitable for gas, which includes a pressure transmitter body, a display screen, a ventilation pipe, a pressure relief device and a filter device. The front side of the pressure transmitter body is the display screen, the bottom of the pressure transmitter body is connected to the ventilation pipe, the right side of the ventilation pipe is connected to the pressure relief device, the pressure relief device has an air outlet, the bottom of the ventilation pipe is connected to the filter device, the filter device has handles on the left and right, and a filter baffle is below the handle.

[0008] Optionally, the filter baffle includes a handle, a sealing block, filter holes and a rubber ring. The filter baffle is circular, the handle is on the sealing block, the rubber ring is on the inner side of the sealing block, and the inner side of the rubber ring is the main part of the filter baffle, on which the filter holes are distributed in a ring shape.

[0009] Optionally, the lower part of the filter device has a blocking groove matched with the blocking block, and a filter baffle jack matched with the filter baffle, and the inner circle of the filter baffle jack has a rubber ring matched with the rubber ring.

[0010] Optionally, a spring, a baffle, and a vent hole are provided inside the ventilation duct, the baffle is at the lower end of the spring, the vent hole is on the baffle, and the baffle, the spring, and the ventilation duct are adapted to each other.

[0011] Optionally, a fixed plate and a contraction plate are provided on the left side inside the pressure relief device, and a contraction opening matched with the contraction plate is provided inside the fixed plate.

[0012] Optionally, the right side of the baffle and the bottom of the retractable plate are integrated.

[0013] By adopting the above technical solution, in this case, the rubber ring on the filter baffle is matched with the rubber ring in the filter plate jack, the rubber plugging is tighter, the plugging block and the plugging groove are adapted to achieve the effect of secondary sealing, and the filter baffle can be replaced by pulling the handle, which is more convenient for subsequent cleaning and can avoid the impact of large particle plugging on the gas. Through the action of the spring, baffle, and vent, when the pressure is too high, the baffle will push the compression spring, drive the retractable plate connected to the baffle, and the retractable plate will retract into the fixed plate. There is a passage between the pressure relief device and the ventilation pipe, and the gas is released through the vent on the pressure relief device to achieve the purpose of pressure relief, avoiding the hidden dangers caused by excessive pressure.

[0014] In summary, the present invention has at least one of the following beneficial effects:

[0015] The utility model ensures that gas will not leak through the rubber ring on the filter baffle, the rubber ring in the filter plate jack, the blocking block and the secondary sealing of the blocking groove. The filter baffle can be cleaned and replaced by the handle, and the gas is purer and the measurement is more accurate by filtering the gas.

[0016] The utility model can achieve the effect of pressure relief through the combined action of the spring, the baffle, the vent hole, the contraction plate, the fixing plate and the vent hole, thereby avoiding the potential safety hazard caused by excessive pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of a pressure transmitter suitable for gas according to the utility model;

[0019] Figure 2 It is a partial schematic diagram of a filtering device suitable for a gas pressure transmitter of the utility model;

[0020] Figure 3 This is a schematic diagram of a filter baffle suitable for a gas pressure transmitter of the utility model;

[0021] Figure 4 This is a schematic diagram of a pressure relief device suitable for a gas pressure transmitter of the utility model;

[0022] List of illustrations: 1. Pressure transmitter body; 2. Display screen; 3. Ventilation duct; 4. Pressure relief device; 5. Air outlet; 6. Filter device; 7. Filter baffle; 8. Handle; 701. Handle; 702. Sealing block; 704. Filter hole; 705. Rubber ring; 9. Filter baffle plug hole; 10. Sealing groove; 11. Spring; 12. Fixing plate; 13. Retraction plate; 14. Baffle; 15. Ventilation hole. Implementation

[0023] The following is combined with Figure 1-4 The utility model is further described in detail.

[0024] Embodiment 1, refer to Figure 1-4In order to solve the problems of the prior art in which large particles of impurities affect the measurement results, the inconvenience of subsequent cleaning, and the lack of an emergency pressure relief device or the inconvenience of using the pressure relief device externally when the pressure is too high, this embodiment is used. The utility model discloses a pressure transmitter suitable for gas, including a pressure transmitter body 1, a display screen 2, a ventilation pipe 3, a pressure relief device 4 and a filter device 6. The front side of the pressure transmitter body 1 is a display screen 2, the bottom of the pressure transmitter body 1 is connected to the ventilation pipe 3, the right side of the ventilation pipe 3 is connected to the pressure relief device 4, the pressure relief device 4 has an air outlet 5, the bottom of the ventilation pipe 3 is connected to the filter device 6, the filter device 6 has handles 8 on the left and right, and a filter baffle 7 is below the handle 8. The filter baffle 7 includes a handle 701, a blocking block 702, a filter hole 704 and a rubber ring 705. The filter baffle 7 is circular, the handle 701 is on the blocking block 702, and a rubber ring 705 is arranged inside the blocking block 702. The main body of the filter baffle 7 is arranged inside the rubber ring 705, and the filter holes 704 are distributed in an annular manner on the main body of the filter baffle 7. The lower half of the filter device 6 has a blocking groove 10 adapted to the blocking block 702, a filter baffle plug 9 adapted to the filter baffle 7, and a rubber ring adapted to the rubber ring 705 in the inner circle of the filter baffle plug 9. The ventilation pipe 3 has a spring 11, a baffle 14 and a vent 15. The baffle 14 is at the lower end of the spring 11, and the vent 15 is on the baffle 14. The baffle 14, the spring 11 and the ventilation pipe 3 are adapted. The right side of the baffle 14 and the bottom of the contraction plate 13 are an integral whole.

[0025] Specific implementation principle: when the pressure is too high, the gas passes through the filter hole 704 on the filter baffle 7 to block the large particles outside the filter baffle 7, and the gas enters the ventilation pipe 3. Part of the gas passes through the vent hole 15 on the baffle 14, and the other part of the gas pushes the baffle 14, and the contraction plate 13 connected to the baffle 14 moves upward and retracts into the groove on the fixed plate 12. This part of the gas passes through the gap between the ventilation pipe 3 and the pressure relief device 4 to the air outlet 5 to achieve the effect of pressure relief. When the pressure returns to normal, the gas force pushing the baffle 14 is not enough to push the baffle 14, and the contraction plate 13 moves downward to isolate the ventilation pipe 3 and the pressure relief device 4 again. The gas through the vent hole 15 on the baffle 14 reaches the pressure transmitter body 1 for measurement, and the data is displayed through the display screen 2 for easy recording and observation. When there are many large particles on the filter baffle 7 and it needs to be cleaned, the handle 701 can be pulled to take out the original filter baffle 7 and replace it with a new filter baffle 7. It is more convenient to remove the old filter baffle 7 for cleaning.

[0026] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure transmitter suitable for gas, characterized in that: The pressure transmitter comprises a pressure transmitter body (1), a display screen (2), a ventilation pipe (3), a pressure relief device (4) and a filter device (6), wherein the display screen (2) is located on the front side of the pressure transmitter body (1), the bottom of the pressure transmitter body (1) is connected to the ventilation pipe (3), the right side of the ventilation pipe (3) is connected to the pressure relief device (4), the pressure relief device (4) is provided with an air outlet (5), the bottom of the ventilation pipe (3) is connected to the filter device (6), the filter device (6) is provided with a handle (8) on the left and right sides respectively, and a filter baffle (7) is located below the handle (8).

2. A pressure transmitter suitable for gas according to claim 1, characterized in that: The filter baffle (7) comprises a handle (701), a blocking block (702), filter holes (704) and a rubber ring (705); the filter baffle (7) is circular, the handle (701) is on the blocking block (702), the rubber ring (705) is disposed inside the blocking block (702), and the main body of the filter baffle (7) is disposed inside the rubber ring (705), on which the filter holes (704) are distributed in an annular manner.

3. A pressure transmitter suitable for gas according to claim 2, characterized in that: The lower part of the filter device (6) has a blocking groove (10) matched with the blocking block (702), and a filter baffle plug hole (9) matched with the filter baffle (7), and the inner ring of the filter baffle plug hole (9) has a rubber ring matched with the rubber ring (705).

4. A pressure transmitter suitable for gas according to claim 1, characterized in that: The ventilation duct (3) has a spring (11), a baffle (14), and a ventilation hole (15) inside. The baffle (14) is at the lower end of the spring (11), and the ventilation hole (15) is on the baffle (14). The baffle (14), the spring (11), and the ventilation duct (3) are compatible with each other.

5. A pressure transmitter suitable for gas according to claim 4, characterized in that: The pressure relief device (4) has a fixed plate (12) and a contraction plate (13) on the left side thereof, and the fixed plate (12) has a contraction opening therein that matches the contraction plate (13).

6. A pressure transmitter suitable for gas according to claim 5, characterized in that: The right side of the baffle (14) and the bottom of the retractable plate (13) are integrally formed.

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