Static pressure detection device for differential pressure transmitter

Abstract

The utility model provides a differential pressure transmitter static pressure detection device, and relates to the detection device technology field, the differential pressure transmitter static pressure detection device comprises a base plate, a support frame and a differential pressure transmitter body, one side of the support frame is provided with a clamping mechanism, the other side of the support frame is provided with a fixing mechanism, two sides of the fixing mechanism are respectively fixedly connected with a plugging block and an output block, and the plugging block and the output block are fixedly connected with the base plate. A gas transmission mechanism is arranged on the other side of the bottom plate; the plugging block and the output block are attached to the air outlet end and the air inlet end of the bottom end of the differential pressure transmitter body respectively, the output end of the air cylinder can drive the two clamping jaws to rotate clockwise with the rotating shaft as the circle center through the connecting frame, and therefore the top ends of the two clamping jaws are attached to the top of the plugging block and the top of the output block respectively. The clamping blocks are used for locking the positions of the plugging block and the output block, the detection positions of the plugging block and the output block are determined, the clamping blocks are driven to be close to or away from the differential pressure transmitter body for replacement only by screwing the threaded rod to rotate forwards and backwards, and the detection efficiency of the differential pressure transmitter body is improved.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, and in particular to a static pressure detection device for a differential pressure transmitter. Background Technology

[0002] A differential pressure transmitter is a typical self-balancing measuring instrument. It uses the working principle of negative feedback to overcome the adverse effects of factors such as component materials and processing technology. It is used to prevent the medium in the pipeline from directly entering the transmitter. The pressure-sensing diaphragm and the transmitter are connected by a capillary tube filled with fluid. The differential pressure transmitter is used to measure the level, flow rate and pressure of liquids, gases or steam, and then converts them into electrical signals for output.

[0003] The accuracy of a differential pressure transmitter is mainly composed of several factors, including the transmitter's reference accuracy, the impact of temperature changes on accuracy, the impact of static pressure on accuracy, long-term drift, and the impact of power supply voltage changes. Among these, reference accuracy, temperature, long-term drift, and power supply voltage are inherent random influences that cannot be eliminated, and their impact is far less than that of static pressure. Currently, differential pressure transmitters are typically calibrated with the low-pressure side open to atmospheric pressure. However, in actual industrial settings, a certain amount of static pressure exists on the negative pressure side of the transmitter. This causes a shift in the zero-point and full-scale output, and the shift increases with higher static pressure. Without static pressure testing, accurate static pressure compensation cannot be provided, severely impacting the overall accuracy of the transmitter.

[0004] Due to factors such as processing and assembly, each transmitter has its own static pressure characteristics. Currently, static pressure testing is mainly conducted in laboratories, and comprehensive testing is not carried out in actual production. Testing each differential pressure transmitter in production, especially in large quantities, is inefficient and time-consuming. Therefore, this utility model proposes a static pressure testing device for differential pressure transmitters to solve the above problems. Utility Model Content

[0005] To address the aforementioned problems, this utility model proposes a static pressure detection device for differential pressure transmitters, thereby solving the issues of low efficiency and long time consumption in the existing technology of testing a large number of differential pressure transmitters one by one.

[0006] To achieve the purpose of this utility model, the utility model is implemented through the following technical solution: a differential pressure transmitter static pressure detection device, including a base plate, a support frame and a differential pressure transmitter body, wherein the support frame is fixedly connected to one side of the base plate, and a clamping mechanism is provided on one side of the support frame, and the differential pressure transmitter body is fixed to the support frame through the clamping mechanism; a fixing mechanism is provided on the other side of the support frame, and a sealing block and an output block are fixedly connected to both sides of the fixing mechanism respectively; and a gas delivery mechanism is provided on the other side of the base plate.

[0007] A further improvement is made in that: the fixing mechanism includes a hinge seat, a rotating shaft, a gripper, a fixing arm, a cylinder, and a connecting frame. The hinge seat is fixedly connected to one side of the support frame, and the rotating shaft is symmetrically hinged to both sides of the hinge seat. A gripper is fixedly connected to one end of the rotating shaft. Cylinders are symmetrically hinged to both sides of the support frame through the fixing arm. A connecting frame is fixedly connected to the output end of the cylinder. One end of the connecting frame is hinged to the bottom end of the gripper through a pin.

[0008] A further improvement is that the two sides of the blocking block and the output block are symmetrically provided with rounded corners, the top of the gripper is provided with an L-shaped structure, and the top of the two grippers are respectively attached to the top of the blocking block and the top of the output block.

[0009] A further improvement is that the output block has a hollow internal structure, one side of the output block is symmetrically connected to an air inlet, the top of the output block is connected to an air supply mechanism, and one end of the air inlet is connected to the air inlet at the bottom of the differential pressure transmitter body.

[0010] A further improvement is that the gas delivery mechanism includes an air pump and a vent pipe. An air pump is installed on the other side of the base plate. The output end of the air pump is connected to two vent pipes, and one end of each vent pipe is connected to the interior of the output block.

[0011] A further improvement is that: the sealing block has symmetrically arranged slots inside, one end of which is threaded with a sealing cap, and the slots are parallel to the bottom air outlet of the differential pressure transmitter body.

[0012] A further improvement is that the clamping mechanism includes a stop block, a threaded rod, and a clamping block. A stop block is fixedly connected to one side of the top of the support frame, and a threaded rod is threadedly connected to the other side of the top of the support frame. One end of the threaded rod is rotatably connected to a clamping block.

[0013] The beneficial effects of this utility model are as follows: the sealing block and the output block are respectively attached to the air outlet and air inlet at the bottom of the differential pressure transmitter body. The output end of the cylinder can drive the two grippers to rotate clockwise around the rotation axis through the connecting bracket, so that the tops of the two grippers are respectively attached to the tops of the sealing block and the output block, thereby locking the positions of the sealing block and the output block and determining the detection positions of the sealing block and the output block. It is only necessary to rotate the threaded rod forward and backward to move the grippers closer to or away from the differential pressure transmitter body for replacement, thus accelerating the detection efficiency of the differential pressure transmitter body. Attached Figure Description

[0014] Figure 1 This is the front view of the present invention;

[0015] Figure 2 This is a schematic diagram of the fixing mechanism structure of this utility model;

[0016] Figure 3 This utility model Figure 2 A magnified view of part A;

[0017] Figure 4 This is a schematic diagram of the output block structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the sealing block structure of this utility model.

[0019] In the diagram: 1. Base plate; 2. Support frame; 3. Differential pressure transmitter body; 4. Sealing block; 5. Output block; 6. Hinge seat; 7. Rotating shaft; 8. Clamp; 9. Fixed arm; 10. Cylinder; 11. Connecting frame; 12. Air inlet; 13. Vent pipe; 14. Air pump; 15. Sealing cover; 16. Stop block; 17. Threaded rod; 18. Clamping block. Detailed Implementation

[0020] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0021] according to Figure 1-5 As shown, this embodiment proposes a differential pressure transmitter static pressure detection device, including a base plate 1, a support frame 2, and a differential pressure transmitter body 3. The support frame 2 is fixedly connected to one side of the base plate 1, and a clamping mechanism is provided on one side of the support frame 2. The differential pressure transmitter body 3 is fixed to the support frame 2 through the clamping mechanism. A fixing mechanism is provided on the other side of the support frame 2, and a sealing block 4 and an output block 5 are fixedly connected to both sides of the fixing mechanism, respectively. A gas delivery mechanism is provided on the other side of the base plate 1. When using this detection device, the differential pressure is first... The transmitter body 3 is placed on top of the support frame 2. Then, the differential pressure transmitter body 3 is fixed on top of the support frame 2 by the clamping mechanism. After that, the blocking block 4 and the output block 5 are respectively connected to the inlet and outlet on both sides of the bottom of the differential pressure transmitter body 3. Then, the position of the blocking block 4 and the output block 5 is automatically locked by the fixing mechanism to ensure that the differential pressure transmitter body 3 is tightly connected to the blocking block 4 and the output block 5 and can be quickly assembled. After that, only the new differential pressure transmitter body 3 needs to be replaced by the clamping mechanism, which accelerates the detection efficiency of the differential pressure transmitter body 3.

[0022] The fixing mechanism includes a hinge seat 6, a rotating shaft 7, a gripper 8, a fixing arm 9, a cylinder 10, and a connecting frame 11. The hinge seat 6 is fixedly connected to one side of the support frame 2. The rotating shaft 7 is symmetrically hinged to both sides of the hinge seat 6. A gripper 8 is fixedly connected to one end of the rotating shaft 7. Cylinders 10 are symmetrically hinged to both sides of the support frame 2 via the fixing arm 9. The output end of the cylinder 10 is fixedly connected to the connecting frame 11. One end of the connecting frame 11 is hinged to the bottom end of the gripper 8 via a pin. The sealing block 4 and the output block 5 are respectively attached to the air outlet and air inlet ends at the bottom of the differential pressure transmitter body 3. The cylinder 10... The output end of cylinder 10 can drive two grippers 8 to rotate clockwise around the rotation shaft 7 via the connecting bracket 11, so that the tops of the two grippers 8 are respectively in contact with the tops of the blocking block 4 and the output block 5, thereby locking the positions of the blocking block 4 and the output block 5 and determining the detection positions of the blocking block 4 and the output block 5. After the differential pressure transmitter body 3 has been completely detected, the output end of cylinder 10 can drive two grippers 8 to rotate counterclockwise around the rotation shaft 7 via the connecting bracket 11, so that the tops of the two grippers 8 are respectively separated from the tops of the blocking block 4 and the output block 5, at which point the blocking block 4 and the output block 5 can be removed from the top of the support frame 2.

[0023] The output block 5 has a hollow interior. One side of the output block 5 is symmetrically connected to an air inlet 12. The top of the output block 5 is connected to the air supply mechanism. One end of the air inlet 12 is connected to the air inlet at the bottom of the differential pressure transmitter body 3.

[0024] The gas supply mechanism includes a gas pump 14 and vent pipes 13. The gas pump 14 is installed on the other side of the base plate 1. The output end of the gas pump 14 is connected to two vent pipes 13. One end of each vent pipe 13 is connected to the interior of the output block 5. The interior of the output block 5 is connected to the output end of the gas pump 14 via the vent pipes 13. The gas pump 14 supplies gas to the interior of the output block 5 through the vent pipes 13. The output block 5 supplies gas to the interior of the differential pressure transmitter body 3 through the gas inlet 12, automatically supplying gas to the interior of the differential pressure transmitter body 3. The differential pressure is applied to drive the PLC-based stepper motor system to control the extension and retraction of the piston mechanism, thereby transmitting the static pressure to the static pressure sensor. At this time, static pressure is applied to both the differential pressure sensor and the differential pressure transmitter. The differential pressure valve and bypass valve are opened, and the differential pressure is adjusted manually. The differential pressure sensor reads the real-time differential pressure, and the differential pressure transmitter under test is also subjected to differential pressure. The output current is displayed on the touch screen through the digital-to-analog conversion circuit for the detection of the differential pressure transmitter body 3.

[0025] The sealing block 4 has symmetrical slots inside, and a sealing cover 15 is threaded to one end of the slot. The slots are parallel to the bottom air outlet of the differential pressure transmitter body 3. The sealing cover 15 is unscrewed from the inside of the sealing block 4 to release pressure from the differential pressure transmitter body 3.

[0026] The clamping mechanism includes a stop block 16, a threaded rod 17, and a clamping block 18. The stop block 16 is fixedly connected to one side of the top of the support frame 2, and the threaded rod 17 is threadedly connected to the other side of the top of the support frame 2. The clamping block 18 is rotatably connected to one end of the threaded rod 17. After the differential pressure transmitter body 3 is placed on the top of the support frame 2, the threaded rod 17 is turned in the forward direction to move the clamping block 18 toward the differential pressure transmitter body 3. The clamping block 18 and the stop block 16 cooperate to clamp the two sides of the differential pressure transmitter body 3 to fix the differential pressure transmitter body 3 on the top of the support frame 2. The threaded rod 17 is turned in the reverse direction to move the clamping block 18 away from the differential pressure transmitter body 3. At this time, the differential pressure transmitter body 3 that has been tested can be taken out from the top of the support frame 2 and replaced with a new differential pressure transmitter body 3.

[0027] The differential pressure transmitter static pressure detection device attaches the blocking block 4 and the output block 5 to the air outlet and air inlet at the bottom of the differential pressure transmitter body 3, respectively. The output end of the cylinder 10 can drive the two grippers 8 to rotate clockwise around the rotating shaft 7 via the connecting bracket 11, so that the tops of the two grippers 8 are respectively attached to the tops of the blocking block 4 and the output block 5, thereby locking the positions of the blocking block 4 and the output block 5 and determining the detection positions of the blocking block 4 and the output block 5. It is only necessary to rotate the threaded rod 17 in both directions to move the gripper 18 closer to or away from the differential pressure transmitter body 3 for replacement, thus accelerating the detection efficiency of the differential pressure transmitter body 3.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A static pressure detecting device of a differential pressure transmitter, comprising a bottom plate (1), a supporting frame (2) and a differential pressure transmitter body (3), characterized in that: One side of the bottom plate (1) is fixedly connected with a support frame (2), one side of the support frame (2) is provided with a clamping mechanism, the support frame (2) is fixed with a differential pressure transmitter body (3) through the clamping mechanism, the other side of the support frame (2) is provided with a fixing mechanism, both sides of the fixing mechanism are fixedly connected with a blocking block (4) and an output block (5) respectively, the other side of the bottom plate (1) is provided with a gas conveying mechanism; The fixing mechanism comprises a hinged seat (6), a rotating shaft (7), a clamping jaw (8), a fixed arm (9), a gas cylinder (10) and a connecting frame (11), one side of the support frame (2) is fixedly connected with the hinged seat (6), both sides of the hinged seat (6) are symmetrically hinged with the rotating shaft (7), one end of the rotating shaft (7) is fixedly connected with the clamping jaw (8), both sides of the support frame (2) are symmetrically hinged with the gas cylinder (10) through the fixed arm (9), the output end of the gas cylinder (10) is fixedly connected with the connecting frame (11), one end of the connecting frame (11) is hinged with the bottom end of the clamping jaw (8) through a pin shaft.

2. The static pressure detection device of claim 1, wherein: Both sides of the blocking block (4) and the output block (5) are symmetrically provided with a rounded corner, the top end of the clamping jaw (8) is provided as an L-shaped structure, and the top ends of the two clamping jaws (8) are respectively connected with the top of the blocking block (4) and the output block (5).

3. The static pressure sensing device of claim 1, wherein: The inside of the output block (5) is provided as a hollow structure, one side of the output block (5) is symmetrically communicated with a gas conveying port (12), the top of the output block (5) is communicated with the gas conveying mechanism, and one end of the gas conveying port (12) is butt jointed with the gas inlet end of the bottom end of the differential pressure transmitter body (3).

4. The static pressure sensing device of claim 3, wherein: The gas conveying mechanism comprises a gas pump (14) and a breather pipe (13), the other side of the bottom plate (1) is provided with the gas pump (14), the output end of the gas pump (14) is communicated with two breather pipes (13), and one end of the two breather pipes (13) is communicated with the inside of the output block (5).

5. The static pressure sensing device of claim 1, wherein: The inside of the blocking block (4) is symmetrically provided with a hollow groove, one end of the hollow groove is threadedly connected with a blocking cover (15), and the hollow groove is parallel to the position of the gas outlet end of the bottom of the differential pressure transmitter body (3) in front and back.

6. The apparatus of claim 1 wherein: The clamping mechanism comprises a stop block (16), a threaded rod (17) and a clamping block (18), one side of the top of the support frame (2) is fixedly connected with the stop block (16), the other side of the top of the support frame (2) is threadedly connected with the threaded rod (17), and one end of the threaded rod (17) is rotatably connected with the clamping block (18).

Images