A safety valve pressure release testing device

Abstract

The utility model belongs to the field of sound insulation and noise reduction, concretely relates to a safety valve pressure release testing arrangement, including pressure release valve test board, still including the mute box, the vibration isolation pedestal is arranged in the bottom of mute box, the vibration isolation pedestal side is connected with the bottom in mute box through the vibration isolator, and the fuselage of pressure release valve test board is fixedly connected on the vibration isolation pedestal, the baffle is fixedly connected in mute box, the baffle divides into lower layer cavity and upper layer cavity in mute box, and pressure release valve test board is located in lower layer cavity, and the through -hole corresponding with pressure release valve test board output is provided on the baffle, so that the measured valve body installed to pressure release valve test board output can be located in upper layer cavity, the air intake muffler that communicates with the lower layer cavity of box is provided on mute box, and the air exhaust muffler that communicates with the upper layer cavity of box is still provided on mute box.

Description

Technical Field

[0001] This utility model belongs to the field of sound insulation and noise reduction, specifically relating to a safety valve pressure release testing device. Background Technology

[0002] Pressure relief valve test benches, such as CN201190820Y or CN210829978U, include a sealed storage tank. The tank is used to set a high-pressure environment. Fasteners for installing safety valves are provided at the output end of the top of the tank. During testing, the safety valve is installed on the tank using the fasteners, and the tank releases pressure to test the performance of the safety valve.

[0003] The testing device itself is a mature existing technology. However, the noise generated by the device when testing the pressure release of the safety valve is exhaust noise, which is an important noise source in industrial production. It is characterized by high intensity, wide frequency range, large pollution hazard range, and high pressure and high speed airflow. It is mainly generated by the uncertainty of high speed airflow and is the main noise source of the device.

[0004] During testing, the testing device also generates significant vibrations, which cause the excitation force of the vibrations on the supporting structure to induce micro-vibrations in the supporting structure. These vibrations then spread and propagate within the building structure in the form of solid-borne sound, creating structural noise with prominent low-frequency characteristics in the adjacent environment.

[0005] The existing equipment's casing is made of ordinary steel plates, which has very limited sound insulation, resulting in a significant noise impact. On-site testing showed that at a distance of approximately 1.5 meters from the device, the noise level was 114 dB(A), classifying it as a strong noise source with a wide frequency spectrum.

[0006] This device is primarily used by various testing departments of the State Grid Corporation of China, transformer manufacturers, third-party testing units, and research institutions. It is typically placed on the first floor or other higher floors of laboratory buildings. During testing, it not only affects staff on the current floor but also significantly impacts staff on floors above and below. For example, in one unit where the device was placed on the second floor, the noise level on the corresponding locations on the third floor directly above and the first floor directly below reached approximately 55 dB(A), disrupting normal office work. Furthermore, some factories place it within their workshops, affecting workers. If the workshop is close to the factory boundary or residential areas, testing cannot be conducted after get off work hours due to potential complaints from nearby residents. It also indirectly affects testing efficiency.

[0007] In response to this situation, the original manufacturer of the testing device also tried to thicken the outer shell of the testing device and add sound-absorbing cotton, rubber pads, etc., but the effect was minimal, which caused great headaches for both the manufacturer and the user. Utility Model Content

[0008] To address the issue of noise and vibration from existing pressure relief valve testing equipment affecting the surrounding environment, this invention provides a safety valve pressure relief testing device.

[0009] The purpose of this utility model is achieved in the following manner: a safety valve pressure release test device, including a pressure release valve test bench 1 and a silent housing 2, wherein a vibration isolation platform 3 is provided at the bottom of the silent housing 2, and the vibration isolation platform 3 is connected to the bottom of the silent housing 2 on the side by a vibration isolator 4, and the body of the pressure release valve test bench 1 is fixedly connected to the vibration isolation platform 3. A partition 21 is fixedly connected inside the soundproof enclosure 2. The partition 21 divides the inside of the soundproof enclosure 2 into a lower cavity 22 and an upper cavity 23. The pressure relief valve test bench 1 is located in the lower cavity 22. The partition 21 is provided with a through hole corresponding to the output end of the pressure relief valve test bench 1, so that the valve body 9 to be tested installed at the output end of the pressure relief valve test bench 1 can be located in the upper cavity 23. The soundproof enclosure 2 is equipped with an air intake silencer 51 that connects the outside of the enclosure to the lower cavity 22; the soundproof enclosure 2 is also equipped with an exhaust silencer 52 that connects the outside of the enclosure to the upper cavity 23.

[0010] Furthermore, the vibration isolator 4 includes an upper housing 41 fixedly connected to the vibration isolation platform 3, and a lower housing 42 fixedly connected to the soundproof enclosure 2. The lower housing 42 includes a base plate 421 and a sleeve 422 fixedly connected to the base plate 421. A spring is provided inside the sleeve 422 to support the upper housing 41 and the lower housing 42. The upper housing 41 extends a connecting wing 411 to the side, and the bottom plate 421 is raised to the side to form a connecting frame 423. A detachable connector 43 is provided between the connecting wing 411 and the connecting frame 423.

[0011] Furthermore, a guide plate 6 is provided inside the upper cavity 23. The guide plate 6 is used to form a guide structure between the output end of the valve body 9 under test and the input end of the exhaust silencer 52.

[0012] Furthermore, the soundproof enclosure 2 on the side of the upper cavity 23 is provided with an observation window 24 and an openable and lockable material changing door 25.

[0013] Furthermore, the side of the silent enclosure 2 is provided with an inspection door 26 that covers the lower cavity 22 and the upper cavity 23 and can be opened, closed and locked.

[0014] Furthermore, the side of the silent enclosure 2 is provided with an air passage interface 27 for connecting the pressure relief valve test bench 1.

[0015] Furthermore, a wire and cable through hole 28 is provided on the side of the silent enclosure 2.

[0016] Furthermore, the bottom four corners of the silent enclosure 2 are respectively provided with leveling feet 7 and casters 8.

[0017] Compared with the prior art, this utility model absorbs the vibration of the testing equipment and reduces the rigid transmission of vibration by using a vibration isolation platform and vibration isolators. The entire testing device is enclosed in a soundproof box and silencers are installed at the air inlet and outlet to reduce mechanical noise during operation and noise generated by exhaust. Attached Figure Description

[0018] Figure 1 This is one of the structural diagrams of a soundproof enclosure; Figure 2 This is the second structural schematic diagram of the soundproof enclosure; Figure 3 This is a cross-sectional view of the soundproof enclosure; Figure 4 This is a schematic diagram of the vibration isolator.

[0019] Among them, pressure relief valve test bench 1, 2. Silent enclosure; 21. Partition; 22. Lower cavity; 23. Upper cavity; 24. Observation window; 25. Material change door; 26. Maintenance door; 27. Air circuit interface; 28. Wire and cable passage. Vibration isolation pedestal 3. Vibration isolator 4, upper housing 41, connecting fin 411, lower housing 42, base plate 421, sleeve 422, connecting frame 423, connector 43 Air intake silencer 51, air exhaust silencer 52 6. Guide plate, 7. Leveling feet, 8. Casters, 9. Valve body under test. Detailed Implementation

[0020] 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.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] As attached Figure 1-3 As shown, a safety valve pressure release testing device includes a pressure release valve test bench 1, which is existing technology (refer to CN201190820Y or CN210829978U). It includes a sealed storage tank, inside which a high-pressure environment is set. Fasteners for installing a safety valve are provided at the top output end of the tank. During testing, the safety valve is installed on the tank using the fasteners, and the tank releases pressure to test the performance of the safety valve. In this invention, the entire structure can be used directly, or the original outer shell can be removed, retaining the tank and its detection, control, and wiring components. It also includes a silent enclosure 2, preferably made of 20-50mm steel plate. The silent enclosure 2 forms a closed structure covering the pressure release valve test bench 1. A vibration isolation platform 3 is provided at the bottom of the silent enclosure 2. The vibration isolation platform 3 is connected to the bottom of the silent enclosure 2 on the side via a vibration isolator 4. The body of the pressure release valve test bench 1 is fixedly connected to the vibration isolation platform 3. A partition 21 is fixedly connected inside the soundproof enclosure 2. The partition 21 divides the soundproof enclosure 2 into two layers: a lower cavity 22 and an upper cavity 23. The pressure relief valve test bench 1 is located in the lower cavity 22. The partition 21 is provided with a through hole corresponding to the output end of the pressure relief valve test bench 1. Preferably, the through hole corresponds to the mounting plate used to install the valve body 9 under test at the output end of the pressure relief valve test bench 1, and forms a gap of at least 5mm to prevent the pressure relief valve test bench 1 from contacting the partition 21 and forming a rigid transmission of vibration when it vibrates. This allows the valve body 9 under test installed at the output end of the pressure relief valve test bench 1 to be located in the upper cavity 23. The soundproof enclosure 2 is equipped with an air inlet silencer 51 that connects the outside of the enclosure to the lower cavity 22; the soundproof enclosure 2 is also equipped with an exhaust silencer 52 that connects the outside of the enclosure to the upper cavity 23. The air inlet silencer 51 and the exhaust silencer 52 can be one of resistive / reactive / composite silencing structures, all of which are mature existing technologies. In detail, the air inlet silencer 51 is located on one side of the inner cavity of the soundproof enclosure 2, forming an air inlet on the side of the soundproof enclosure 2, and forming an air outlet after extending a sufficient length inside the soundproof enclosure 2; the exhaust silencer 52 is located on the top outside the soundproof enclosure 2, forming an air inlet on the top of the soundproof enclosure 2, and forming an air outlet after extending a sufficient length on the top of the soundproof enclosure 2, which makes reasonable use of space and reduces external interference.

[0023] The vibration isolation platform 3 includes a steel shell, which is filled with concrete. Two to eight vibration isolators 4 are fixedly connected to both sides of the vibration isolation platform 3.

[0024] The vibration isolator 4 can adopt a conventional vibration isolator, that is, a conventional basic structure including upper and lower shells and a spring connecting the upper and lower shells. However, preferably, the vibration isolator 4 of this utility model is specially designed to solve the problem of this utility model. Specifically: As attached Figure 4 As shown, the vibration isolator 4 includes an upper housing 41 fixedly connected to the vibration isolation platform 3. The upper housing 41 is fixed with a U-shaped connecting frame by bolts. The side of the U-shaped connecting frame is welded to the side of the vibration isolation platform 3. It also includes a lower housing 42 fixedly connected to the bottom surface of the inner cavity of the soundproof box 2. The lower housing 42 includes a base plate 421 and a sleeve 422 fixedly connected to the base plate 421. A spring is provided inside the sleeve 422 to support the upper housing 41 and the lower housing 42. The main improvement is that: the upper shell 41 extends a preferably horizontal connecting wing 411 to the side, the bottom plate 421 is raised to the side to form a preferably door-shaped connecting frame 423, and a detachable connector 43 is provided between the connecting wing 411 and the connecting frame 423.

[0025] The purpose of connecting the connecting wing 411 and the connecting frame 423 through the connector 43 is to provide support during equipment assembly or when the equipment is not being tested.

[0026] Specifically, the connector 43 is preferably a bolt, and the connecting wing 411 and the connecting frame 423 are provided with through holes for the screw to pass through. Only the screw is shown in the figure, and the nut is not shown. This is because the following operating conditions exist: 1. During the assembly of the whole machine, since the vibration isolation platform 3 and the pressure relief valve test platform 1 are only elastically connected to the soundproof box 2 through the vibration isolator 4, collisions are likely to occur and cause damage. At this time, the nut enters from the bottom of the connecting frame 423 and engages with the screw thread. It is continuously screwed until the spring in the upper and lower shells is compressed, so that the vibration isolator 4 forms a relatively stable support during the installation process. After the installation is completed, the bolts are removed during actual use.

[0027] 2. In the shutdown state without testing, two nuts are installed between the connecting wing 411 and the connecting frame 423, which are threaded with the screw. One nut abuts against the bottom surface of the connecting wing 411, and the other nut abuts against the top surface of the connecting frame 423. When in position, the spring is in a balanced position of ±5mm without stretching or compression. The specific position can be achieved by pre-marking the scale on the upper and lower housings. The purpose is to provide auxiliary support through bolts when not in use, reduce the compression state of the spring, and increase the spring life.

[0028] Furthermore, a guide plate 6 is provided inside the upper cavity 23. The guide plate 6 is used to form a flow guiding structure between the output end of the valve body 9 under test and the input end of the exhaust silencer 52, such as... Figure 3 In the test, the output end of the valve body 9 faces the horizontal direction, and the input end of the exhaust silencer 52 is located on the top surface of the upper cavity 23. An arc-shaped guide plate 6 is set to guide the horizontal airflow to the air inlet of the vertical exhaust silencer 52.

[0029] Furthermore, the upper cavity 23 has an observation window 24 on the side of the soundproof enclosure 2, which is a double or even multi-layered glass, and a material replacement door 25 that can be opened and locked. The material replacement door 25 is hinged to the soundproof enclosure 2 by a hinge, and it is locked, which means that a locking structure is provided between the soundproof enclosure 2 and the material replacement door 25. The material replacement door 25 is also preferably provided with an observation glass. During the testing process, the valve body 9 to be tested is replaced through the material replacement door 25, and the partition 21 forms a convenient working plane.

[0030] Further details are attached. Figure 2 As shown, the side of the soundproof enclosure 2 is provided with an inspection door 26 that covers the lower cavity 22 and the upper cavity 23 and can be opened, closed and locked. The inspection door 26 is preferably a double door, and the two doors are respectively hinged to the soundproof enclosure 2. The two doors are preferably directly provided with a locking structure.

[0031] Furthermore, the side of the silent enclosure 2 is provided with an air passage interface 27 for connecting the pressure relief valve test bench 1. The outer side of the air passage interface 27 is used to connect to the air supply equipment through a pipeline, and the inner side of the air passage interface 27 is used to connect to the air tank of the pressure relief valve test bench 1 through a pipeline.

[0032] Furthermore, the side of the soundproof enclosure 2 is provided with a wire and cable through hole 28. Preferably, in actual use, after the wiring is connected and laid out, sealing putty is applied to the wire and cable through hole 28.

[0033] Furthermore, the bottom four corners of the silent enclosure 2 are respectively provided with leveling feet 7 and casters 8.

[0034] The working process of this utility model is based on the usage process of existing testing devices. This utility model mainly contributes to the direction of noise reduction and vibration damping.

[0035] When the silent testing device is working, the noise level at one meter outside its enclosure is ≤85dB(A), which meets the equivalent sound level limit requirement for 8 hours of working time specified in the "Hygienic Standard for Industrial Enterprise Design" (GBZ1-2002), and also greatly reduces the impact on the surrounding acoustic environment.

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present utility model, and these should also be considered within the protection scope of the present utility model.

Claims

1. A safety valve pressure release testing device, comprising a pressure release valve test bench (1), characterized in that: It also includes a silent enclosure (2), and a vibration isolation platform (3) is provided at the bottom of the silent enclosure (2). The vibration isolation platform (3) is connected to the bottom of the silent enclosure (2) on the side by a vibration isolator (4). The body of the pressure relief valve test bench (1) is fixedly connected to the vibration isolation platform (3). A partition (21) is fixedly connected inside the silent enclosure (2). The partition (21) divides the inside of the silent enclosure (2) into a lower cavity (22) and an upper cavity (23). The pressure relief valve test bench (1) is located in the lower cavity (22). The partition (21) is provided with a through hole corresponding to the output end of the pressure relief valve test bench (1), so that the valve body (9) to be tested installed at the output end of the pressure relief valve test bench (1) can be located in the upper cavity (23). The silent enclosure (2) is provided with an air intake silencer (51) that connects the outside of the enclosure to the lower cavity (22); the silent enclosure (2) is also provided with an exhaust silencer (52) that connects the outside of the enclosure to the upper cavity (23).

2. The safety valve pressure release testing device as described in claim 1, characterized in that: The vibration isolator (4) includes an upper housing (41) fixedly connected to the vibration isolation platform (3), and a lower housing (42) fixedly connected to the soundproof enclosure (2). The lower housing (42) includes a base plate (421) and a sleeve (422) fixedly connected to the base plate (421). A spring is provided inside the sleeve (422) to support the upper housing (41) and the lower housing (42). The upper shell (41) extends a connecting wing (411) to the side, and the bottom plate (421) is raised to the side to form a connecting frame (423). A detachable connector (43) is provided between the connecting wing (411) and the connecting frame (423).

3. The safety valve pressure release testing device as described in claim 1, characterized in that: The upper cavity (23) is provided with a guide plate (6), which is used to form a guide structure between the output end of the valve body (9) under test and the input end of the exhaust silencer (52).

4. The safety valve pressure release testing device as described in claim 1, characterized in that: The upper cavity (23) is provided with an observation window (24) on the side of the soundproof box (2) and a material changing door (25) that can be opened, closed and locked.

5. The safety valve pressure release testing device as described in claim 1, characterized in that: The silent enclosure (2) is provided with an inspection door (26) on the side that covers the lower cavity (22) and the upper cavity (23) and can be opened, closed and locked.

6. The safety valve pressure release testing device as described in claim 1, characterized in that: The side of the silent enclosure (2) is provided with an air passage interface (27) for connecting the pressure relief valve test bench (1).

7. The safety valve pressure release testing device as described in claim 1, characterized in that: The soundproof enclosure (2) has a wire and cable through hole (28) on its side.

8. The safety valve pressure release testing device as described in claim 1, characterized in that: The bottom of the silent enclosure (2) is provided with leveling feet (7) and casters (8) at the four corners.

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