Fire protection pressure switch testing device

Abstract

The utility model discloses a fire-fighting pressure switch testing arrangement, including controller, test pipeline mechanism and pressure regulation mechanism, test pipeline mechanism is equipped with main pipeline, is set up in main pipeline and is used to undertake the busbar of calibration pressure switch and the pressure switch of being measured, and through one way valve A and the water suction pipe of main pipeline intercommunication, pressure regulation mechanism is equipped with piston cylinder and the power mechanism of piston rod of piston cylinder can drive piston cylinder telescopic movement, and the air outlet of piston cylinder is connected with one end of main pipeline and intercommunication, when piston rod of piston cylinder carries out the extension movement, and the water in outside water supply flows into main pipeline through water suction pipe, when piston rod of piston cylinder carries out the retraction movement, and the gas in piston cylinder enters main pipeline from the air outlet, and pushes the water flow through busbar, and from the other end of main pipeline flows out. The testing arrangement can be suitable for the high accuracy test of pressure switch of various range specifications, and the structure is simple, and is easy to assemble, and the production cost is low, and is favorable for production application.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, and in particular to a fire pressure switch testing device. Background Technology

[0002] Currently, pressure switch testing devices on the market include manual and automatic testing devices. Manual testing devices typically have a pressure testing range of 0–60 MPa, but they are time-consuming and labor-intensive, and their testing accuracy is generally low. Automatic testing devices offer better testing efficiency and accuracy, but they are complex in structure and expensive. Furthermore, their larger pressure testing range makes them unsuitable for testing pressure switches with smaller ranges (e.g., 0–10 MPa), potentially increasing the risk of damage during testing.

[0003] In view of the above, this utility model is hereby proposed. Summary of the Invention

[0004] To overcome the above-mentioned defects, this utility model provides a fire pressure switch testing device, which can not only be used to perform high-precision testing on pressure switches of various range specifications, but also has a simple and reasonable structure, is easy to assemble, and has low production cost.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a fire pressure switch testing device, comprising: Controller; The test pipeline mechanism includes a main pipeline, a manifold located on the main pipeline for receiving the calibration pressure switch and the pressure switch under test, and a water suction pipe connected to the main pipeline via a one-way valve A. The calibration pressure switch and the pressure switch under test are respectively connected to the controller, and the water suction pipe is connected to an external water supply source. The pressure regulating mechanism includes a piston cylinder and a power mechanism that can drive the piston rod of the piston cylinder to extend and retract under the control of the controller, and the air outlet of the piston cylinder is connected and communicates with one end of the main pipeline. When the power mechanism drives the piston rod of the piston cylinder to extend, water from the external water supply source flows into the main pipeline through the suction pipe; when the power mechanism drives the piston rod of the piston cylinder to retract, gas inside the piston cylinder enters the main pipeline through its vent, pushing water through the manifold and out from the other end of the main pipeline.

[0006] As a further improvement of this utility model, a one-way valve B for restricting the gas flow direction is also provided on the main pipeline, and the one-way valve B is located behind the manifold in the direction in which the gas drives the water flow.

[0007] As a further improvement of this utility model, a throttling valve for controlling water flow is also provided on the main pipeline, and the throttling valve is located in front of the manifold.

[0008] As a further improvement of this utility model, the main pipeline is composed of multiple branch pipes connected in series through multiple compression fittings; the calibration pressure switch includes a mechanical pressure switch and a digital pressure switch.

[0009] As a further improvement of this utility model, one of the ferrule connectors is a three-way ferrule connector, and one port of the three-way ferrule connector is connected and communicates with the one-way valve A.

[0010] As a further improvement of this utility model, the power mechanism is provided with a drive motor, a lead screw and a nut that is threadedly engaged with the lead screw. The drive motor can drive the lead screw to move along its axial direction, and one end of the lead screw is connected to the piston rod of the piston cylinder.

[0011] As a further improvement of this utility model, the fire pressure switch testing device also includes a housing base, the housing base having a receiving cavity, a slide rail extending along the axial direction of the lead screw being fixedly laid in the receiving cavity, and a mounting seat being slidably installed on the slide rail; The power mechanism and the piston cylinder are both built into the receiving cavity. Meanwhile, the drive motor is fixedly mounted on the mounting base and is connected to the other end of the lead screw. The nut and the cylinder body of the piston cylinder are respectively fixedly connected to the inner wall of the receiving cavity through the support.

[0012] As a further improvement of this utility model, the power mechanism is also provided with a floating joint and a gear reducer. One end of the lead screw is connected to the piston rod of the piston cylinder through the floating joint, and the other end of the lead screw is connected to the drive motor through the gear reducer.

[0013] As a further improvement of this utility model, the input component of the gear reducer is an input gear, which is positioned and sleeved on the power output shaft of the drive motor. The output component of the gear reducer is provided with an output shaft and an output gear positioned on the output shaft. The output shaft is rotatably mounted on the mounting base and connected to the other end of the lead screw via a coupling. The output gear is driven by the input gear. In addition, an arc-shaped limiting groove is provided on the mounting base, and a limiting post is fixedly provided on the output gear. The limiting post is movably inserted into the limiting groove, that is, the limiting groove and the limiting post can cooperate to limit the distance of the lead screw reciprocating along its axial direction.

[0014] As a further improvement of this utility model, the chassis base is also provided with a test platform, on which at least a portion of the main pipeline, the busbar, the calibration pressure switch and the pressure switch under test are arranged.

[0015] The beneficial effects of this utility model are as follows: Compared with the prior art, the fire pressure switch testing device provided by this utility model has the following advantages: ① The testing device can accurately control the start and stop of the pressure regulating mechanism, so that the test pressure is flexibly adjustable while maintaining it well within the set range. Therefore, the testing device is well applicable to testing pressure switches of various range specifications (including but not limited to small range pressure switches of 0-10MPa), and the testing accuracy is high. ② The overall structure of the testing device is simple and reasonable, easy to assemble, and has low production cost, which is conducive to production application. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the fire-fighting pressure switch testing device described in this utility model; Figure 2 This is a top view of the fire-fighting pressure switch testing device described in this utility model. Figure 3 This is a partial structural diagram of the fire pressure switch testing device of the present invention (part of the structure of the chassis base has been removed). Figure 4 for Figure 3 A schematic diagram of the pressure control mechanism shown in the figure; Figure 5 for Figure 4 An enlarged structural diagram of part A shown in the image; Figure 6 This is a block diagram showing the connection relationship between the controller, calibration pressure switch, and drive motor in the fire-fighting pressure switch testing device of this utility model.

[0017] Referring to the accompanying drawings, the following explanations are provided: 1. Controller; 20. Main pipe; 200. Branch pipe; 201. Compression fitting; 21. Calibration pressure switch; 210. Mechanical pressure switch; 211. Digital pressure switch; 22. Manifold; 23. Check valve A; 24. Suction pipe; 25. Check valve B; 26. Throttle valve; 30. Piston cylinder; 31. Drive motor; 32. Lead screw; 33. Nut; 34. Floating joint; 350. Output shaft; 351. Output gear; 352. Limiting post; 4. Chassis base; 40. Receiving cavity; 41. Slide rail; 42. Mounting base; 420. Limiting groove; 43. Support; 44. Test platform; 45. Connecting seat. Detailed Implementation

[0018] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Example:

[0020] Please see the appendix Figure 1 To be continued Figure 6 As shown, this embodiment provides a fire-fighting pressure switch testing device, including a controller 1, a test pipeline mechanism, and a pressure regulating mechanism. The controller 1 may be, but is not limited to, a PLC controller. The test pipeline mechanism includes a main pipeline 20, a manifold 22 disposed on the main pipeline 20 for receiving a calibration pressure switch 21 and a pressure switch under test TS (such as a digital pressure switch), and a suction pipe 24 connected to the main pipeline 20 through a one-way valve A23. The calibration pressure switch 21 and the pressure switch under test TS are respectively communicatively connected to the controller 1, and the suction pipe 24 is connected to an external water supply source. The pressure regulating mechanism includes a piston cylinder 30 and a power mechanism that can drive the piston rod of the piston cylinder 30 to extend and retract under the control of the controller 1. The air outlet of the piston cylinder 30 is connected to and communicates with one end of the main pipeline 20. Understandably, the working method of the fire pressure switch testing device provided in this embodiment is as follows: ① When the power mechanism drives the piston rod of the piston cylinder 30 to extend, the pressure inside the piston cylinder 30 and the pressure inside the main pipeline 20 both decrease accordingly. At that time, water from the external water supply source will flow into the main pipeline 20 through the suction pipe 24 and the one-way valve A23. The one-way valve A23 effectively prevents water in the main pipeline 20 from flowing back into the suction pipe 24. ② When the power mechanism drives the piston rod of the piston cylinder 30 to retract, the gas inside the piston cylinder 30 is compressed and has a certain pressure. The compressed gas enters the main pipeline 20 through the vent hole and pushes the water through the manifold 22 before flowing out from the other end of the main pipeline 20. Furthermore, it can be understood that when water flows through the manifold 22, both the calibration pressure switch 21 and the pressure switch under test TS will detect the water pressure information (hereinafter referred to as "water pressure information") and transmit it to the controller 1. The controller 1 compares and analyzes the received water pressure information and controls the calibration of the pressure switch under test TS accordingly based on the analysis results. For example, if the water pressure information P0 detected by the calibration pressure switch 21 is inconsistent with the water pressure information P1 detected by the pressure switch under test TS, then the pressure switch under test TS needs to be calibrated and compensated by ΔP = P0 - P1.

[0021] As can be seen from the above, compared with the prior art, the fire pressure switch testing device provided in this embodiment has the following advantages: ① The testing device can accurately control the start and stop of the pressure regulating mechanism, so that the test pressure is flexibly adjustable while maintaining it well within the set range. Therefore, the testing device is well applicable to testing pressure switches of various range specifications (including but not limited to small range pressure switches of 0-10MPa), and the test accuracy is high. ② The overall structure of the testing device is simple and reasonable, easy to assemble, and has low production cost, which is conducive to production application.

[0022] The specific structure of the fire pressure switch testing device provided in this embodiment is described in detail below.

[0023] First, regarding the aforementioned test piping mechanism.

[0024] Please continue to refer to the appendix. Figure 1 To be continued Figure 3 As shown, in the test pipeline structure provided in this embodiment, the main pipeline 20 is composed of multiple branch pipes 200 connected in series through multiple compression fittings 201. It is understood that the above-described forming method / structure of the main pipeline 20 is not only convenient to assemble, but also has good installation adaptability and is easy to install and layout. Furthermore, from the attached... Figure 2 It can be clearly seen that one of the multiple ferrule connectors 201 is a three-way ferrule connector, and the rest are elbow-type ferrule connectors and straight-through ferrule connectors; wherein, one port of the three-way ferrule connector is connected and communicates with the one-way valve A23.

[0025] The manifold 22 is a key component in the piping system used for centralized distribution or collection of fluids. Its core function is to converge or divert multiple fluid streams to different paths, while also providing standardized interfaces for installing pressure switches and other detection equipment. It is a conventional component in piping systems and therefore will not be described in detail here. (See attached...) Figure 1 To be continued Figure 3 As can be seen, the busbar 22 not only facilitates the installation of the calibration pressure switch 21 and the pressure switch under test TS, but also enables the testing of multiple pressure switches under test TS at one time, significantly improving testing efficiency.

[0026] The calibration pressure switch 21 includes a mechanical pressure switch 210 and a digital pressure switch 211. It is understood that: ① This embodiment uses two types of pressure switches as calibration switches, which significantly improves calibration accuracy. ② When using two types of pressure switches as calibration switches, the calibration method can be, but is not limited to, the following: First, the controller 1 calculates the average value P2 of the water pressure information detected by the mechanical pressure switch 210 and the digital pressure switch 211. Then, the calibration compensation for the pressure switch TS under test is ΔP1 = P2 - P1, where P1 is the water pressure information detected by the pressure switch TS under test.

[0027] In addition, please continue to refer to the appendix. Figure 1 To be continued Figure 3 As shown, in the test pipeline structure provided in this embodiment, a one-way valve B25 for restricting the gas flow direction and a throttle valve 26 for controlling the water flow are also provided on the main pipeline 20. In the direction in which the gas drives the water flow, the one-way valve B25 is located behind the manifold 22, and the throttle valve 26 is located in front of the manifold 22. It can be understood that the one-way valve B25, the manifold 22, and the throttle valve 26 are connected in series on the main pipeline 20.

[0028] Furthermore, the throttle valve 26 can preferably be a needle-type throttle valve to achieve precise control of water flow and simulate on-site pressure loss, thereby realizing dynamic monitoring of pressure switch fluctuation detection, etc.

[0029] Next, regarding the pressure control mechanism.

[0030] Please continue to refer to the appendix. Figure 3 To be continued Figure 5 As shown, in the pressure regulating mechanism provided in this embodiment, the preferred implementation structure of the power mechanism is as follows: the power mechanism includes a drive motor 31, a lead screw 32, and a nut 33 that is threadedly engaged with the lead screw 32. The drive motor 31 can drive the lead screw 32 to move along its axial direction, and one end of the lead screw 32 is connected to the piston rod of the piston cylinder 30, thereby driving the piston rod of the piston cylinder 30 to perform telescopic movement. It is understood that the lead screw 32 and the piston rod of the piston cylinder 30 are arranged coaxially.

[0031] Furthermore, the structure that enables the drive motor 31 to drive the lead screw 32 to move along its axial direction is as follows: Please refer to the appendix. Figure 3 To be continued Figure 5As shown, the fire pressure switch testing device also includes a housing base 4, which has a receiving cavity 40. A slide rail 41 extending axially along the lead screw 32 is fixedly laid in the receiving cavity 40, and a mounting seat 42 is slidably installed on the slide rail 41. Specifically, the mounting seat 42 is fixedly mounted on an L-shaped connecting seat 45, and the connecting seat 45 is slidably mounted on the slide rail 41 by a slider. The power mechanism and the piston cylinder 30 are both built into the receiving cavity 40. At the same time, the drive motor 31 is fixedly mounted on the mounting seat 42 and is connected to the other end of the lead screw 32. The nut 33 and the cylinder body of the piston cylinder 30 are respectively fixedly connected to the inner wall of the receiving cavity 40 through the support 43. Understandably, when the drive motor 31 drives the lead screw 32 to rotate, since the nut 33 is fixed, the reaction causes the lead screw 32 to move along its axial direction while rotating, thereby causing the drive motor 31 and the mounting base 42 to move synchronously along the axial direction of the lead screw 32.

[0032] Furthermore, the structure for achieving the transmission connection between the drive motor 31 and the other end of the lead screw 32 is as follows: the power mechanism also includes a gear reducer, which has an input component, an intermediate component, and an output component. The input component is an input gear, which is positioned and sleeved on the power output shaft of the drive motor 31. The intermediate component consists of a rotating shaft and an intermediate gear positioned and sleeved on the rotating shaft, and the rotating shaft is rotatably mounted on the mounting base 42. The output component includes an output shaft 350 and an output gear 351 positioned and sleeved on the output shaft 350. The output shaft 350 is rotatably mounted on the mounting base 42 and connected to the other end of the lead screw 32 via a coupling. The output gear 351 is connected to the input gear through meshing transmission via the intermediate gear. (See attached diagram.) Figure 5 As shown. Understandably, when the drive motor 31 is working, power is transmitted sequentially through the input gear, the intermediate gear, the output gear 351 and the output shaft 350, which can drive the lead screw 32 to rotate.

[0033] In addition, please continue to refer to the appendix. Figure 5As shown, this embodiment also includes an arc-shaped limiting groove 420 on the mounting base 42, and a limiting post 352 fixedly mounted on the output gear 351. The limiting post 352 is movably inserted into the limiting groove 420. It can be understood that the limiting groove 420 and the limiting post 352 can cooperate to limit the rotation angle range of the output component, thereby limiting the distance of the lead screw 32's axial reciprocating motion, that is, limiting the distance of the piston rod's extension and retraction motion of the piston cylinder 30, thus ensuring that the generated test pressure is well maintained within the set range. Furthermore, to better control the stroke of the piston rod of the piston cylinder 30, this embodiment also includes a limit switch in the receiving cavity 40 for sensing the movement position of the lead screw 32 / or the piston rod of the piston cylinder 30, and the limit switch is also connected to the controller 1.

[0034] Please continue to refer to the appendix. Figure 3 and attached Figure 4 As shown, the power mechanism is also provided with a floating joint 34, and one end of the lead screw 32 is connected to the piston rod of the piston cylinder 30 through the floating joint 34.

[0035] Please continue to refer to the appendix. Figure 2 and attached Figure 3 As shown, the chassis base 4 is also provided with a test platform 44 adjacent to the receiving cavity 40, and at least a portion of the main pipeline 20, the busbar 22, the calibration pressure switch 21 and the pressure switch under test TS are all arranged on the test platform 44.

[0036] In summary, the fire-fighting pressure switch testing device provided in this application is not only applicable to high-precision testing of pressure switches with various range specifications, but also has a simple and reasonable structure, is easy to assemble, has low production cost, and is conducive to production applications.

[0037] Finally, it should be noted that the suffixes "A", "B", etc. in the component names in this specification (such as one-way valve A, one-way valve B, etc.) are only for the purpose of clarity of description and are not intended to limit the scope of implementation of this utility model patent.

[0038] Many specific details have been set forth in the above description to provide a full understanding of this utility model. However, the above description is only a preferred embodiment of this utility model, and this utility model can be implemented in many other ways different from those described herein. Therefore, this utility model is not limited to the specific embodiments disclosed above. Furthermore, any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the methods and techniques disclosed above, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, shall still fall within the protection scope of the technical solution of this utility model.

Claims

1. A fire-fighting pressure switch testing device, characterized in that: include: Controller (1); The test pipeline mechanism includes a main pipeline (20), a manifold (22) installed on the main pipeline (20) to receive the calibration pressure switch (21) and the pressure switch to be tested, and a suction pipe (24) connected to the main pipeline (20) through a one-way valve A (23). The calibration pressure switch (21) and the pressure switch to be tested are respectively connected to the controller (1) for communication. The suction pipe (24) is connected to an external water supply source. The pressure regulating mechanism is provided with a piston cylinder (30) and a power mechanism that can drive the piston rod of the piston cylinder (30) to perform telescopic movement under the control of the controller (1), and the air outlet of the piston cylinder (30) is connected and communicated with one end of the main pipeline (20); When the power mechanism drives the piston rod of the piston cylinder (30) to extend, water from the external water supply source flows into the main pipeline (20) through the suction pipe (24); when the power mechanism drives the piston rod of the piston cylinder (30) to retract, gas in the piston cylinder (30) enters the main pipeline (20) through the vent hole, pushing water through the manifold (22) and out from the other end of the main pipeline (20).

2. The fire-fighting pressure switch testing device according to claim 1, characterized in that: A one-way valve B (25) for restricting the flow of gas is also provided on the main pipeline (20), and the one-way valve B (25) is located behind the manifold (22) in the direction in which the gas drives the water flow.

3. The fire-fighting pressure switch testing device according to claim 2, characterized in that: A throttle valve (26) for controlling water flow is also provided on the main pipeline (20), and the throttle valve (26) is located in front of the manifold (22).

4. The fire pressure switch testing device according to claim 1, characterized in that: The main pipeline (20) is composed of multiple branch pipes (200) connected in series through multiple compression fittings (201); The calibration pressure switch (21) includes a mechanical pressure switch (210) and a digital pressure switch (211).

5. The fire-fighting pressure switch testing device according to claim 4, characterized in that: One of the ferrule connectors (201) is a three-way ferrule connector, and one port of the three-way ferrule connector is connected and communicates with the one-way valve A (23).

6. The fire-fighting pressure switch testing device according to claim 1, characterized in that: The power mechanism is provided with a drive motor (31), a lead screw (32) and a nut (33) that is threadedly engaged with the lead screw (32). The drive motor (31) can drive the lead screw (32) to move along its axial direction, and one end of the lead screw (32) is connected to the piston rod of the piston cylinder (30).

7. The fire-fighting pressure switch testing device according to claim 6, characterized in that: The fire pressure switch testing device also includes a housing base (4), the housing base (4) is provided with a receiving cavity (40), a slide rail (41) extending axially along the lead screw (32) is fixedly laid in the receiving cavity (40), and a mounting seat (42) is slidably installed on the slide rail (41). The power mechanism and the piston cylinder (30) are both built into the receiving cavity (40). Meanwhile, the drive motor (31) is fixedly installed on the mounting base (42) and is connected to the other end of the lead screw (32). The nut (33) and the cylinder body of the piston cylinder (30) are respectively fixedly connected to the inner wall of the receiving cavity (40) through the support (43).

8. The fire pressure switch testing device according to claim 7, characterized in that: The power mechanism is also provided with a floating joint (34) and a gear reducer. One end of the lead screw (32) is connected to the piston rod of the piston cylinder (30) through the floating joint (34), and the other end of the lead screw (32) is connected to the drive motor (31) through the gear reducer.

9. The fire pressure switch testing device according to claim 8, characterized in that: The input component of the gear reducer is an input gear, which is positioned and sleeved on the power output shaft of the drive motor (31); The output component of the gear reducer is provided with an output shaft (350) and an output gear (351) positioned on the output shaft (350). The output shaft (350) is rotatably mounted on the mounting base (42) and connected to the other end of the lead screw (32) through a coupling. The output gear (351) is connected to the input gear in a transmission connection. In addition, an arc-shaped limiting groove (420) is provided on the mounting base (42), and a limiting post (352) is fixedly provided on the output gear (351). The limiting post (352) is movably inserted into the limiting groove (420), that is, the limiting groove (420) and the limiting post (352) can cooperate to limit the distance of the lead screw (32) reciprocating along its axial direction.

10. The fire-fighting pressure switch testing device according to claim 7, characterized in that: The chassis base (4) is also provided with a test platform (44), on which at least a portion of the main pipeline (20), the busbar (22), the calibration pressure switch (21) and the pressure switch to be tested are arranged.

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