A power plant pressure transmitter calibration device

Abstract

The utility model discloses a kind of thermal power plant pressure transmitter calibration devices, it is related to thermal power plant pressure transmitter technical field, including grip lever, the grip lever outer wall end portion is rotatably installed with torsion ring, the torsion ring side wall is fixedly installed with screw rod, the screw rod outer wall is threadedly connected with strut, the strut side wall is slidably installed with palm heart rod, the palm heart rod end away from torsion ring is fixedly installed with connecting rod, the connecting rod inner wall is rotatably installed with reciprocating rod, the reciprocating rod end portion is rotatably installed with piston;In the utility model, by rotating the torsion ring of grip lever end portion drives screw rod, make strut move, in the initial stage of pressure transmitter calibration, strut is close to torsion ring, piston stroke is long, can quickly promote pressure, when approaching range upper limit critical point, strut is close to piston, piston stroke is short, realize trace pressurization, effectively avoid the problem that pressure momentary over-limit is caused by manual pump pressurization stroke fixed.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure transmitters for thermal power plants, specifically a calibration device for pressure transmitters in thermal power plants. Background Technology

[0002] In the production and operation of thermal power plants, pressure transmitters are key equipment. Their measurement accuracy and stability play a crucial role in the safe operation and efficient production of the entire power plant. To ensure that pressure transmitters can work accurately and reliably, regular calibration is an essential step. A scientific and effective pressure transmitter calibration device is the core element to ensure the accuracy and smooth progress of calibration work.

[0003] In the existing calibration process of pressure transmitters in thermal power plants, most calibration devices use manual pumps as the pressure input source for pressurization. Manual pumps have advantages such as simple structure, low cost, and portability. However, the pressurization stroke of a manual pump is fixed, resulting in a constant pressure increment for each pressurization. When the pressure transmitter calibration approaches its upper limit, a single pressurization may cause the pressure to momentarily exceed the critical value that the transmitter can withstand. Once the pressure exceeds the critical value, it may cause the transmitter sensor output to saturate, distort the measurement data, and affect the accuracy of the calibration results. In severe cases, it may directly damage the transmitter sensor. Due to the repeated pressurization action over a long period of time, operators are prone to developing muscle memory, which may lead to uncontrolled pressurization amplitude.

[0004] To address the problems associated with manual pump pressurization, electric pumps have become a viable alternative. Electric pumps can achieve automatic and precise pressure control, effectively avoiding pressure runaway issues caused by manual operation. However, in actual calibration work at thermal power plants, temporary calibration tasks are frequently encountered. Since the normal operation of electric pumps is highly dependent on external energy, a stable external energy supply cannot be obtained in a timely and convenient manner in temporary calibration scenarios. This results in electric pumps being unable to be flexibly deployed and used, making it difficult to meet the requirements of flexibility and convenience for temporary calibration tasks.

[0005] In view of the above, this application is hereby submitted. Utility Model Content

[0006] The purpose of this invention is to provide a pressure transmitter calibration device for thermal power plants to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model provides a pressure transmitter calibration device for thermal power plants, including a grip rod. A torsion ring is rotatably installed at the end of the outer wall of the grip rod. A screw is fixedly installed on the side wall of the torsion ring. A support rod is threadedly connected to the outer wall of the screw. A palm rod is slidably installed on the side wall of the support rod. A connecting rod is fixedly installed at the end of the palm rod away from the torsion ring. A reciprocating rod is rotatably installed on the inner wall of the connecting rod. A piston is rotatably installed at the end of the reciprocating rod. A pressure tube is slidably abutted against the outer wall of the piston. The side wall of the pressure tube is fixedly connected to the side end of the outer wall of the grip rod. A connector is rotatably installed at the bottom of the pressure tube.

[0008] Furthermore, the support rod includes an adjusting plate slidably mounted on the inner wall of the slide groove, a slot is fixedly mounted on the side end of the adjusting plate, an insert rod is rotatably mounted on the inner wall of the slot, a sliding plate is fixedly mounted on the side end of the insert rod, and the outer wall of the sliding plate is slidably connected to the inner wall of the limiting groove;

[0009] The reciprocating rod includes a first rotating shaft rotatably mounted on the inner wall of the connecting rod, a support rod fixedly mounted on the outer wall of the first rotating shaft, and a second rotating shaft fixedly mounted on the side end of the support rod. The two ends of the second rotating shaft are rotatably connected to the inner wall of the piston.

[0010] Furthermore, the inner wall of the adjusting plate is provided with a threaded hole, and the inner wall of the threaded hole is threadedly connected to the outer wall of the screw.

[0011] The inner wall of the connector is provided with a threaded groove, which is consistent with the external thread specification of the transmitter's pressure port. A sealing ring is provided at the top of the inner wall of the connector.

[0012] Furthermore, the inner wall of the grip bar is provided with a sliding groove, the inner wall of the palm bar is provided with a limiting groove, the inner walls of the sliding groove and the limiting groove are slidably connected to the outer walls of both ends of the support rod, and the two ends of the adjusting plate and the sliding plate are both arc-shapedly installed with limiting rods, and the outer walls of the four limiting rods are respectively slidably connected to the inner walls of the sliding groove and the limiting groove.

[0013] Furthermore, a ventilation groove is provided on the outer wall of the grip bar away from the palm, and an integrally formed anti-slip texture is provided on the surface of the ventilation groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. By rotating the torsion ring at the end of the lever, the screw is driven, causing the support rod to move. In the initial stage of pressure transmitter calibration, the support rod is close to the torsion ring, and the piston stroke is long, which can quickly increase the pressure. When approaching the upper limit of the range, the support rod is close to the piston, and the piston stroke is short, achieving micro-pressurization. This effectively avoids the problem of instantaneous pressure overshoot caused by the fixed pressurization stroke of a manual pump, improves the accuracy of pressure control, and ensures the accuracy of calibration results.

[0016] 2. The entire calibration process is started by rotating the torsion ring at the end of the handle. It does not rely on external power. In temporary calibration tasks at thermal power plants, it can be carried out anytime and anywhere without being limited by power supply or other conditions. This improves the flexibility and convenience of calibration work and meets the special requirements of temporary calibration tasks for the device.

[0017] 3. By pressing the palm lever, the connecting rod is driven. The support rod fixed to the inner shaft of the connecting rod rotates around the inner shaft. The second shaft at the side end of the support rod drives the piston to reciprocate in the pressure tube, which reduces operator fatigue and improves the operator's work comfort and efficiency. Attached Figure Description

[0018] Figure 1 A schematic diagram of the front structure of a pressure transmitter calibration device for a thermal power plant.

[0019] Figure 2 This is a schematic cross-sectional view of a pressure transmitter calibration device for a thermal power plant.

[0020] Figure 3 A schematic diagram of the strut connection structure of a pressure transmitter calibration device for a thermal power plant.

[0021] Figure 4 This is a schematic diagram of the bottom structure of a pressure transmitter calibration device for a thermal power plant.

[0022] In the diagram: 1. Grip bar; 101. Slide groove; 102. Ventilation groove; 2. Palm bar; 201. Limiting groove; 3. Support rod; 301. Adjusting plate; 302. Threaded hole; 303. Limiting rod; 304. Sliding plate; 305. Insert rod; 306. Slot; 4. Connecting rod; 5. Reciprocating rod; 501. Support rod; 502. Rotating shaft one; 503. Rotating shaft two; 6. Pressure tube; 7. Connector; 701. Sealing ring; 8. Screw; 9. Torsion ring; 10. Piston. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-4This utility model provides a technical solution: a pressure transmitter calibration device for thermal power plants, including a handle 1. A torsion ring 9 is rotatably mounted on the outer end of the handle 1. The entire calibration process is started by rotating the torsion ring 9 at the end of the handle 1. It does not rely on external energy and can be carried out anytime and anywhere in temporary calibration tasks in thermal power plants, without being limited by power supply conditions. The handle 1 is designed for easy gripping by operators. A screw 8 is fixedly mounted on the side wall of the torsion ring 9. A support rod 3 is threadedly connected to the outer wall of the screw 8. The rotation of the torsion ring 9 drives the screw 8, thereby moving the support rod 3. The threaded connection between the screw 8 and the support rod 3 allows for precise control of the movement distance of the support rod 3, thereby achieving precise control of the piston 10 stroke. The operator can precisely control the pressure amplitude of each pressurization by fine-tuning the torsion ring 9 according to the specific range and calibration requirements of the pressure transmitter, so as to meet the calibration work with different accuracy requirements. The palm rod 2 is slidably installed on the side wall of the support rod 3. The sliding cooperation between the palm rod 2 and the support rod 3, as well as the transmission structure of the connecting rod 4 and the reciprocating rod 5, allows the operator to exert force naturally when applying pressure, reducing operator fatigue. The end of the palm rod 2 away from the torsion ring 9 is fixedly installed with the connecting rod 4. The reciprocating rod 5 is rotatably installed on the inner wall of the connecting rod 4. The piston 10 is rotatably installed at the end of the reciprocating rod 5. The movement of the support rod 3 will change the lever position between the grip rod 1 and the palm rod 2, thereby adjusting the stroke of the piston 10 in the pressure tube 6. In the initial stage of pressure transmitter calibration, the strut 3 is close to the torsion ring 9, and the piston 10 has a long stroke, which can quickly increase the pressure. When approaching the upper limit of the range, the strut 3 is close to the piston 10, and the piston 10 has a short stroke, achieving micro-pressurization. This effectively avoids the problem of instantaneous pressure exceeding the limit caused by the fixed pressurization stroke of a manual pump, improves the accuracy of pressure control, and ensures the accuracy of calibration results. The outer wall of the piston 10 slides against the pressure tube 6, and the side wall of the pressure tube 6 is fixedly connected to the side end of the outer wall of the handle 1. A connector 7 is rotatably installed at the bottom of the pressure tube 6.

[0025] Please see Figure 2This utility model provides a technical solution: a pressure transmitter calibration device for thermal power plants, including a sliding groove 101 on the inner wall of the grip rod 1 and a limiting groove 201 on the inner wall of the palm rod 2, wherein the inner walls of the sliding groove 101 and the limiting groove 201 are slidably connected to the outer walls of both ends of the support rod 3. Because the inner wall of the grip bar 1 has a sliding groove 101 and the inner wall of the palm bar 2 has a limiting groove 201, the two ends of the support rod 3 slide in the sliding groove 101 and the limiting groove 201 respectively. This design can effectively prevent the support rod 3 from deviating or shaking during the sliding process, ensuring that the support rod 3 can only move in a straight line along the preset direction. The support rod 3 includes an adjusting plate 301 that is slidably installed on the inner wall of the sliding groove 101, and the adjusting plate 301 of the support rod 3 is threadedly connected to the screw 8. When the torsion ring 9 rotates and drives the screw 8 to rotate, the support rod 3 can move flexibly under the constraint of the sliding groove 101 and the limiting groove 201. A slot 306 is fixedly installed on the side end of the adjusting plate 301, and an insert rod 305 is rotatably installed on the inner wall of the slot 306. A sliding plate 304 is fixedly installed on the side end of the insert rod 305, and the outer wall of the sliding plate 304 is slidably connected to the inner wall of the limiting groove 201. The flexible movement of the strut 3 allows for changes in the lever point between the grip 1 and the palm lever 2, thereby adjusting the stroke of the piston 10.

[0026] Please see Figure 2 , Figure 3 This utility model provides a technical solution: a pressure transmitter calibration device for thermal power plants, including an adjusting plate 301 and a sliding plate 304, both ends of which are equipped with limit rods 303 at an arc. Since the limit rods 303 at both ends of the adjusting plate 301 and the sliding plate 304 slide in the sliding groove 101 and the limiting groove 201 respectively, a multi-directional constraint mechanism is formed. The outer walls of the four limit rods 303 are slidably connected to the inner walls of the sliding groove 101 and the limiting groove 201 respectively. Compared with relying solely on the sliding of the main body of the adjusting plate 301 and the sliding plate 304, the presence of the limit rods 303 can effectively prevent the support rod 3 from deviating in the front-back and left-right directions during the sliding process, ensuring that the support rod 3 always moves stably along the straight line direction specified by the sliding groove 101 and the limiting groove 201.

[0027] Please see Figure 3 This utility model provides a technical solution: a pressure transmitter calibration device for thermal power plants, including an adjustment plate 301 with a threaded hole 302 on its inner wall. Based on the precise transmission ratio characteristics of the threaded connection, the inner wall of the threaded hole 302 is threadedly connected to the outer wall of the screw 8. When the screw 8 rotates, the adjustment plate 301 will make precise linear motion along the axial direction of the screw 8.

[0028] Please see Figure 2This utility model provides a technical solution: a pressure transmitter calibration device for a thermal power plant, including a reciprocating rod 5 including a rotating shaft 502 rotatably mounted on the inner wall of a connecting rod 4. The reciprocating rod 5 is rotatably connected to the inner wall of the connecting rod 4 through the rotating shaft 502. When the connecting rod 4 moves, it will drive the rotating shaft 502 and the entire reciprocating rod 5 to move. A support rod 501 is fixedly installed on the outer wall of the rotating shaft 502. The support rod 501 transmits the movement of the rotating shaft 502 to the rotating shaft 503. The rotating shaft 503 is fixedly installed on the side end of the support rod 501. The rotating shaft 503 then drives the piston 10 to make linear reciprocating motion in the pressure tube 6. The two ends of the rotating shaft 503 are rotatably connected to the inner wall of the piston 10.

[0029] Please see Figure 4 This utility model provides a technical solution: a pressure transmitter calibration device for thermal power plants, including a handle 1 with a ventilation groove 102 on the outer wall away from the palm handle 2. When the user holds the handle 1 for a long time, the hand is prone to sweating due to continuous force. The presence of the ventilation groove 102 can form an air circulation channel, accelerate the air flow between the contact surface of the hand and the handle 1, effectively remove the heat and sweat generated by the hand, and keep the hand dry. The surface of the ventilation groove 102 is provided with an integrally formed anti-slip texture. The inner wall of the connector 7 is provided with a threaded groove, and the threaded groove is consistent with the external thread specification of the transmitter pressure port. This standardized threaded connection design allows the connector 7 to quickly and accurately connect with the transmitter pressure port. A sealing ring 701 is provided at the top of the inner wall of the connector 7.

[0030] Working principle: First, connect connector 7 to the pressure port of the pressure transmitter to ensure accurate pressure transmission. When pressurization begins, rotate the torsion ring 9 at the outer end of the grip 1, which drives the screw 8 fixed thereto to rotate. Because the screw 8 is threadedly connected to the threaded hole 302 in the adjusting plate 301 of the support rod 3, the support rod 3 will move closer to the torsion ring 9. At this time, the adjusting plate 301 of the support rod 3 slides in the sliding groove 101 in the grip 1, and the sliding plate 304 slides in the limiting groove 201 in the palm rod 2, changing the lever point between the grip 1 and the palm rod 2, so that the piston 10 has a longer stroke in the pressure tube 6. The operator holds the grip 1, which has ventilation grooves 102 and anti-slip textures, and presses the palm rod to press the pressure. The core rod 2 drives the connecting rod 4. The support rod 501, which is fixed by the rotating shaft 502 inside the connecting rod 4, rotates around the rotating shaft 502. The rotating shaft 503 at the side end of the support rod 501 drives the piston 10 to reciprocate in the pressure tube 6. Because the piston 10 has a long stroke, a large amount of air pressure enters the pressure tube 6 each time, which can quickly increase the pressure inside the transmitter. When it approaches the upper limit critical point of the transmitter's range, the torsion ring 9 is rotated again, so that the support rod 3 moves to the end closer to the piston 10, changing the lever position and shortening the stroke of the piston 10 to achieve micro-pressurization. This avoids the pressure from instantly exceeding the critical value and prevents the transmitter sensor output from saturating or being damaged. When the pressure reaches the required calibration value, the operation is stopped, and the calibration work is completed.

[0031] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A pressure transmitter calibration device for thermal power plants, comprising a handle (1), characterized in that: A torsion ring (9) is rotatably installed on the outer end of the grip (1). A screw (8) is fixedly installed on the side wall of the torsion ring (9). A support rod (3) is threadedly connected to the outer wall of the screw (8). A palm rod (2) is slidably installed on the side wall of the support rod (3). A connecting rod (4) is fixedly installed at the end of the palm rod (2) away from the torsion ring (9). A reciprocating rod (5) is rotatably installed on the inner wall of the connecting rod (4). A piston (10) is rotatably installed at the end of the reciprocating rod (5). A pressure tube (6) is slidably abutted against the outer wall of the piston (10). The side wall of the pressure tube (6) is fixedly connected to the side end of the outer wall of the grip (1). A connector (7) is rotatably installed at the bottom of the pressure tube (6).

2. The pressure transmitter calibration device for thermal power plants as described in claim 1, characterized in that: The inner wall of the grip (1) is provided with a sliding groove (101), and the inner wall of the palm rod (2) is provided with a limiting groove (201). The inner walls of the sliding groove (101) and the limiting groove (201) are slidably connected to the outer walls of both ends of the support rod (3).

3. The pressure transmitter calibration device for thermal power plants as described in claim 2, characterized in that: The support rod (3) includes an adjusting plate (301) that is slidably installed on the inner wall of the slide groove (101). A slot (306) is fixedly installed on the side end of the adjusting plate (301). A plug rod (305) is rotatably installed on the inner wall of the slot (306). A sliding plate (304) is fixedly installed on the side end of the plug rod (305). The outer wall of the sliding plate (304) is slidably connected to the inner wall of the limiting groove (201).

4. The pressure transmitter calibration device for thermal power plants as described in claim 3, characterized in that: Both ends of the adjusting plate (301) and sliding plate (304) are equipped with limit rods (303) with an arc. The outer walls of the four limit rods (303) are slidably connected to the inner walls of the sliding groove (101) and the limiting groove (201), respectively.

5. The pressure transmitter calibration device for thermal power plants as described in claim 4, characterized in that: The inner wall of the adjusting plate (301) is provided with a threaded hole (302), and the inner wall of the threaded hole (302) is threadedly connected to the outer wall of the screw (8).

6. The pressure transmitter calibration device for thermal power plants as described in claim 5, characterized in that: The reciprocating rod (5) includes a first rotating shaft (502) rotatably mounted on the inner wall of the connecting rod (4), a support rod (501) fixedly mounted on the outer wall of the first rotating shaft (502), a second rotating shaft (503) fixedly mounted on the side end of the support rod (501), and the two ends of the second rotating shaft (503) rotatably connected to the inner wall of the piston (10).

7. The pressure transmitter calibration device for thermal power plants as described in claim 6, characterized in that: The outer wall of the grip (1) away from the palm bar (2) is provided with a ventilation groove (102), and the surface of the ventilation groove (102) is provided with an integrally formed anti-slip texture.

8. The pressure transmitter calibration device for thermal power plants as described in claim 7, characterized in that: The inner wall of the connector (7) is provided with a threaded groove, which is consistent with the external thread specification of the transmitter pressure port. A sealing ring (701) is provided at the top of the inner wall of the connector (7).

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