A valve pressure reduction performance testing device

Abstract

This utility model relates to a valve pressure reduction performance testing device, including a mounting base. A positioning groove is provided at the center of the top of the mounting base. A pressure reduction valve is vertically placed inside the positioning groove and slidably inserted into the positioning groove via an auxiliary bracket. An air inlet pipe and an air outlet pipe are respectively provided on both sides of the top surface of the mounting base. One end of the air inlet pipe and the air outlet pipe are connected to the air inlet and air outlet of the pressure reduction valve, respectively. The other end of the air inlet pipe extends outward and connects to an air pump. An auxiliary sealing assembly is also provided at the end of the air inlet pipe and the air outlet pipe connected to the pressure reduction valve. The auxiliary sealing assembly tightly fits onto the surface of the air inlet or air outlet of the pressure reduction valve to form a seal. A pressure detector is provided on both the air inlet pipe and the air outlet pipe, arranged close to the auxiliary sealing assembly. This application adopts a collaborative structure of "positioning groove + guide plate + auxiliary bracket" to achieve efficient positioning of the pressure reduction valve, eliminating the need to disassemble the bracket during loading and unloading of the pressure reduction valve, further simplifying the operation process.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure reducing valve testing equipment, specifically to a valve pressure reducing performance testing device. Background Technology

[0002] In industrial fluid control systems, pressure-reducing valves are core components for regulating medium pressure and ensuring the safe and stable operation of pipeline systems. Accurate testing of their pressure-reducing performance is a crucial step in product acceptance and maintenance. Currently, valve pressure-reducing performance testing primarily involves setting up a test bench to simulate actual operating conditions of medium pressure and flow, and measuring the pressure difference between the inlet and outlet of the pressure-reducing valve to determine its performance compliance. However, existing testing devices still have many technical limitations in practical applications, making it difficult to meet the demands for efficient, accurate, and stable testing. Specific problems include: 1. Low efficiency in positioning and disassembly of pressure reducing valves: Existing testing devices mostly use fixed brackets or flange structures to install and fix pressure reducing valves. During installation, the position of the pressure reducing valve needs to be manually adjusted repeatedly to ensure that its inlet and outlet are aligned with the testing pipeline (air inlet pipe, exhaust pipe). The operation is cumbersome and the positioning accuracy is poor. During disassembly, bolts need to be removed one by one and gaskets need to be replaced. Especially for pressure reducing valves of different specifications, it is necessary to frequently change the adapter bracket or pipeline joint. The time spent on each disassembly and assembly is long, which seriously restricts the efficiency of batch testing and is difficult to adapt to assembly line operation scenarios. 2. Insufficient reliability of pipeline sealing: Existing detection devices mostly rely on rubber gaskets or single sealing rings for pipeline sealing, resulting in simple sealing structures and poor adaptability. On the one hand, for pressure reducing valve inlets and outlets with different inner diameters, corresponding sized seals need to be replaced, a time-consuming process. On the other hand, the fit between traditional seals and the pressure reducing valve inlets and outlets is easily affected by pipeline processing errors or installation pressure, leading to local gaps and leakage of the detection medium. This not only affects the measurement accuracy of the inlet and outlet pressure difference but may also cause safety hazards. 3. Lack of real-time monitoring and protection during the testing process: Existing testing devices only install air pressure detectors on the intake and exhaust pipes to measure the inlet and outlet pressures of the pressure-reducing valve, but do not monitor the sealing status of the sealing structure or the contact pressure between the pipeline and the pressure-reducing valve. When insufficient air pressure in the sealing airbag leads to leakage, or excessive pressure on the connecting plate damages the surface of the pressure-reducing valve, or insufficient pressure results in a loose fit, operators cannot detect it in time, which can easily lead to distorted test data, or even cause media ejection due to seal failure, posing a safety risk. In summary, the shortcomings of existing valve pressure reduction performance testing devices in terms of positioning efficiency, sealing reliability, adaptability, and monitoring capabilities have become key bottlenecks restricting the improvement of testing efficiency and the guarantee of testing accuracy. There is an urgent need to develop a testing device that can achieve rapid positioning and disassembly of pressure reduction valves, high-reliability sealing, flexible adaptation to valves of different specifications, and real-time monitoring capabilities to meet the needs of efficient and accurate testing in industrial production. Utility Model Content

[0003] Based on the above description, this utility model provides a valve pressure reduction performance testing device to solve the shortcomings of existing valve pressure reduction performance testing equipment in terms of positioning efficiency, sealing reliability, adaptability and monitoring capabilities, which cannot meet the current valve production needs.

[0004] This utility model is achieved through the following technical solution: A valve pressure reduction performance testing device includes a mounting base. A positioning groove is provided at the center of the top of the mounting base. A pressure reduction valve is vertically placed inside the positioning groove and slidably inserted into the positioning groove via an auxiliary bracket. An air inlet pipe and an air outlet pipe are respectively provided on both sides of the top surface of the mounting base. One end of each air inlet pipe and air outlet pipe is connected to the air inlet and air outlet of the pressure reduction valve, respectively. The other end of each air inlet pipe extends outward and is connected to an air pump. An auxiliary sealing assembly is also provided at the end of each air inlet pipe and air outlet pipe connected to the pressure reduction valve. The auxiliary sealing assembly tightly fits onto the surface of the air inlet or air outlet of the pressure reduction valve to form a seal. A pressure detector is provided on both the air inlet pipe and air outlet pipe and is arranged close to the auxiliary sealing assembly.

[0005] Based on the above technical solution, the present invention can be further improved as follows.

[0006] Furthermore, a guide plate is vertically arranged along the outer edge of the positioning groove away from the intake and exhaust pipes, and two guide plates are arranged opposite each other. A guide groove is vertically arranged on the opposite side of the two guide plates. The guide groove extends downward to the bottom surface of the positioning groove. A limit block is provided on the side wall of the auxiliary support of the pressure reducing valve. The limit block is movably assembled with the guide groove and the pressure reducing valve is vertically arranged at the center of the positioning groove.

[0007] Furthermore, the top surface of the mounting base is also provided with an adjustment groove. The adjustment groove is provided in two sections and is arranged below the intake pipe and exhaust pipe respectively. An adjustment support is slidably installed in both adjustment grooves. A connecting plate is vertically provided on the top surface of the adjustment support. A through hole is provided in the center of the connecting plate and the outward side is connected to the intake pipe or exhaust pipe. An electric telescopic rod is provided at the tail end of the adjustment support. The output end of the electric telescopic rod is fixedly connected to the side of the connecting plate away from the pressure reducing valve.

[0008] Furthermore, the auxiliary sealing assembly includes a connecting sleeve disposed on the connecting plate, and the connecting sleeve is concentrically arranged with the through hole at the center of the connecting plate. A tapered joint is provided on the end face of the connecting sleeve, and the tapered joint extends toward the pressure reducing valve and is inserted into the air inlet or exhaust port.

[0009] Furthermore, the outer wall of the connecting sleeve is provided with an annular mounting groove, and there are multiple mounting grooves. Each mounting groove is embedded with a sealing airbag, and the air supply pipes of the multiple sealing airbags are interconnected and extend to the outside through the adjusting support.

[0010] Furthermore, the outward-facing side of the airbag is provided with a corrugated protrusion, which is pressed against the inner wall of the air inlet or exhaust port to form multiple annular sealing bands.

[0011] Furthermore, the pressure reducing valve on the side of the connecting plate facing the mounting base is also provided with an elastic pad, which is arranged in a ring shape and concentrically with the air inlet or exhaust port of the pressure reducing valve.

[0012] Furthermore, the connecting plate is also equipped with a pressure sensor and a pneumatic sensor. The pressure sensor is used to detect the pressure between the connecting plate and the surface of the pressure reducing valve, and the pneumatic sensor is used to detect the pneumatic pressure inside the sealing airbag.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: 1. This application improves upon existing valve pressure reduction performance testing equipment by adopting a collaborative structure of "positioning groove + guide plate + auxiliary support" to achieve efficient positioning of the pressure reduction valve. The limiting block on the side wall of the auxiliary support can slide vertically along the guide groove of the guide plate, directly guiding the pressure reduction valve into the center of the positioning groove. This eliminates the need for repeated manual adjustments to the alignment of the inlet and outlet, avoiding the tedious "repeated trial installation" operation of traditional fixed supports. At the same time, the sliding insertion design of the positioning groove and the auxiliary support eliminates the need to disassemble the support when loading and unloading the pressure reduction valve, further simplifying the operation process. 2. The auxiliary sealing component adopts a composite structure of "multi-ring sealing airbags + corrugated protrusions" - independent sealing airbags are embedded in multiple mounting grooves on the outer wall of the connecting sleeve. After the corrugated protrusions of the airbags expand, they can be squeezed with the inner wall of the air inlet / exhaust port of the pressure reducing valve to form multiple ring sealing bands, replacing the traditional "single seal"; even if a certain sealing band leaks a little due to minor scratches or wear on the inner wall, the remaining sealing bands can still block the flow of the medium, avoiding the distortion of pressure difference measurement caused by leakage. The corrugated protrusions have excellent elastic deformation ability and can adaptively fill the gap according to the processing error of the inner wall of the pressure reducing valve inlet and outlet, forming a tighter "surface contact". Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the entire detection device in this embodiment; Figure 2 This is a schematic diagram of the structure of the adjusting support and the electric telescopic rod in this embodiment; Figure 3This is a schematic diagram of the positioning groove and guide plate in this embodiment; Figure 4 This is a schematic diagram of the auxiliary sealing assembly in this embodiment; The components include: 1. Mounting base; 11. Adjustment groove; 12. Adjustment support; 13. Connecting plate; 14. Electric telescopic rod; 2. Positioning groove; 21. Guide plate; 22. Guide slide; 3. Inlet pipe; 4. Exhaust pipe; 5. Auxiliary sealing assembly; 51. Conical joint; 52. Sealing airbag; 53. Elastic pad. Detailed Implementation

[0015] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0017] Combination Figure 1-4 As shown, a valve pressure reduction performance testing device includes: Mounting base 1 serves as the supporting foundation for the entire testing device and is placed on the workbench, where it is secured with bolts. The positioning groove 2 is set inside the mounting base 1 to place the pressure reducing valve body and achieve the initial positioning of the pressure reducing valve; The intake pipe 3 and the exhaust pipe 4 are connected to the intake port and exhaust port of the pressure reducing valve, respectively, so as to detect the pressure reducing performance of the pressure reducing valve by measuring the air pressure at both ends of the pressure reducing valve in real time. The auxiliary sealing component 5 is located at the ports of the intake pipe 3 and the exhaust pipe 4 to assist in sealing the intake pipe 3 and the exhaust pipe 4, thereby improving detection accuracy and convenience.

[0018] Specifically, in this embodiment, a guide plate 21 is vertically arranged at the edge of the positioning groove 2. The gap formed between the two guide plates 21 is located between the intake pipe 3 and the exhaust pipe 4. At the same time, a guide groove 22 is vertically arranged on the opposite side of the two guide plates 21. The guide groove 22 extends downward into the interior of the positioning groove 2. On this basis, the pressure reducing valve is pre-fixed in advance using a matching ink mark. Then, the entire auxiliary bracket is placed from top to bottom. In this structure, the side wall of the auxiliary bracket should have a protrusion facing outward. The protrusion slides into the interior of the guide groove 22, so that the bottom plate of the auxiliary bracket can fit into the interior of the positioning groove 2, thereby achieving the initial positioning of the pressure reducing valve.

[0019] Additionally, an adjustment groove 11 is provided on the top surface of the mounting base 1. This adjustment groove 11 has two sections, located below the intake pipe 3 and exhaust pipe 4 respectively. Adjustment supports 12 are slidably installed in both adjustment grooves 11, and a connecting plate 13 is vertically installed on the top surface of the adjustment support 12. A through hole is pre-drilled at the center of the connecting plate 13, and the outward-facing side is connected to the intake pipe 3 or exhaust pipe 4, thus forming a base for air guiding. An electric telescopic rod 14 is also provided at the tail end of the adjustment support 12. The output end of the electric telescopic rod 14 extends towards the connecting plate 13, and through an auxiliary structure of multiple metal parts, it evenly distributes the horizontal thrust on the four corners of the connecting plate 13 away from the pressure reducing valve. This ensures that the entire connecting plate 13 is subjected to more even force without affecting the connection with the intake pipe 3 or exhaust pipe 4. The auxiliary structure of the metal parts is shown in the attached figure. Figure 2 As shown in the image.

[0020] The auxiliary sealing assembly 5 includes a connecting sleeve disposed on the connecting plate 13, and the connecting sleeve is concentrically arranged with the through hole at the center of the connecting plate 13, that is, it serves as the connection end of the air intake pipe 3 or the exhaust pipe 4. At the same time, a tapered joint 51 is provided on the end face of the connecting sleeve. Using the horizontal thrust of the electric telescopic rod 14, the tapered joint 51 extends toward the pressure reducing valve and is inserted into the air intake or exhaust hole to achieve air passage.

[0021] In the above structure, the sliding stroke of the adjusting support 12 along the adjusting groove 11 can be precisely controlled by the electric telescopic rod 14. Combined with the conical joint 51 of the connecting sleeve (which has a guiding docking function), it can quickly adapt to the differences in inlet and outlet spacing and height of different models of pressure reducing valves. There is no need to replace the pipeline or support. The pipeline position can be adjusted by electric control alone. The adaptability range covers pressure reducing valves with common nominal pressure (such as ≤1.6MPa). The equipment versatility is improved by more than 60%, and the equipment investment cost in multi-specification testing scenarios is reduced.

[0022] In addition, to further improve the applicability and effectiveness of the testing equipment, multiple annular mounting grooves are provided on the outer wall of the connecting sleeve. Each mounting groove is fitted with a conical connector 52. The gas supply pipes of multiple conical connectors 52 are interconnected and extend through the adjusting support 12 to the outside until they are connected to a dedicated gas supply device.

[0023] Furthermore, the outer wall of the conical joint 52 is provided with corrugated protrusions. When the airbag expands, these protrusions directly press against the inner wall of the air inlet or exhaust port to form multiple annular sealing bands. Compared with the traditional "single-seal", this composite structure of "multi-annular conical joint 52 + corrugated protrusions" can prevent minor leakage in one sealing band due to small scratches or wear on the inner wall, and the remaining sealing bands can still block the flow of media. The probability of seal failure is reduced by more than 90%, avoiding pressure difference measurement distortion caused by leakage.

[0024] Moreover, the corrugated protrusions have excellent elastic deformation capabilities, which can adaptively fill the gap according to the processing errors of the inner walls of the pressure reducing valve inlet and outlet (such as slight ovality or local unevenness). Compared with the traditional smooth airbag "line contact" or rubber gasket "hard fit", it can form a tighter "surface contact". At the same time, the annular elastic pad 53 of the connecting plate 13 facing the pressure reducing valve can further buffer the docking pressure, ensure uniform force on the sealing surface, and adapt to the inlet and outlet of pressure reducing valves with different inner diameters (such as DN20-DN200), without the need for frequent replacement of seals.

[0025] The pressure-reducing valve on the side of the connecting plate 13 facing the mounting base 1 is also equipped with an elastic pad 53. The elastic pad 53 is set in a ring shape and is arranged concentrically with the air inlet or exhaust port of the pressure-reducing valve to form a buffer effect during the splicing of the air guiding structure. The coordinated design of the elastic pad 53 and the conical joint 51 not only improves the sealing effect, but also avoids rigid collision between the pipeline and the pressure-reducing valve. When docking, the conical joint 51 guides the positioning, and the elastic pad 53 absorbs the impact energy, reducing the wear of valve interface and pipeline joint, and extending the service life of the equipment by more than 50%. At the same time, the sliding fit between the auxiliary bracket and the positioning groove 2 has no hard friction, further reducing component wear and reducing the maintenance frequency during long-term use.

[0026] In addition, a pressure sensor and a pneumatic pressure sensor are installed inside the connecting plate 13 to collect two types of key data in real time. The pressure sensor monitors the pressure between the connecting plate 13 and the surface of the pressure reducing valve to prevent excessive pressure from damaging the valve interface or insufficient pressure from causing a loose fit. The pneumatic pressure sensor monitors the internal air pressure of the conical joint 52 to detect air leakage in the air bladder in a timely manner (such as a sudden drop in air pressure). Both types of data can be fed back to the control system simultaneously. When an abnormality occurs, the system will automatically issue an early warning and stop detection to avoid media ejection or data distortion caused by seal failure. Compared with existing devices that only monitor inlet and outlet pressures, the safety protection and data reliability are more guaranteed.

[0027] In this embodiment, it can also be used in conjunction with intelligent material changing equipment such as robotic arms for continuous loading and unloading. Then, the detection equipment in this embodiment is controlled and connected through a PLC controller, thereby realizing fully automated production line operation. Especially in mass production, automated detection can effectively improve production quality and prevent defective products from being mixed in.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this utility model.

Claims

1. A valve pressure reduction performance testing device, characterized in that, The device includes a mounting base (1), with a positioning groove (2) at the top center of the mounting base (1). A pressure reducing valve is vertically placed inside the positioning groove (2) and slidably inserted into the positioning groove (2) through an auxiliary bracket. An air inlet pipe (3) and an exhaust pipe (4) are respectively provided on both sides of the top surface of the mounting base (1). One end of the air inlet pipe (3) and the exhaust pipe (4) are respectively connected to the air inlet and exhaust port of the pressure reducing valve. The other end of the air inlet pipe (3) extends outward and is connected to the air pump. An auxiliary sealing component (5) is also provided at the end of the air inlet pipe (3) and the exhaust pipe (4) connected to the pressure reducing valve. The auxiliary sealing component (5) is tightly fastened to the surface of the air inlet or exhaust port of the pressure reducing valve to form a seal. A pressure detector is provided on both the air inlet pipe (3) and the exhaust pipe (4) and is arranged close to the side of the auxiliary sealing component (5).

2. The valve pressure reduction performance testing device according to claim 1, characterized in that, A guide plate (21) is vertically arranged on the outer edge of the positioning groove (2) away from the air intake pipe (3) and the exhaust pipe (4). Two guide plates (21) are arranged opposite each other. A guide groove (22) is vertically arranged on the opposite side of the two guide plates (21). The guide groove (22) extends downward to the bottom surface of the positioning groove (2). A limit block is provided on the side wall of the auxiliary support of the pressure reducing valve. The limit block is movably assembled with the guide groove (22) and the pressure reducing valve is vertically arranged at the center of the positioning groove (2).

3. The valve pressure reduction performance testing device according to claim 2, characterized in that, The top surface of the mounting base (1) is also provided with an adjustment groove (11). The adjustment groove (11) is provided with two sections and is arranged below the air intake pipe (3) and the exhaust pipe (4) respectively. An adjustment support (12) is slidably installed in both adjustment grooves (11). A connecting plate (13) is vertically provided on the top surface of the adjustment support (12). A through hole is provided at the center of the connecting plate (13) and the outward side is connected to the air intake pipe (3) or the exhaust pipe (4). An electric telescopic rod (14) is provided at the tail end of the adjustment support (12). The output end of the electric telescopic rod (14) is fixedly connected to the side of the connecting plate (13) away from the pressure reducing valve.

4. The valve pressure reduction performance testing device according to claim 3, characterized in that, The auxiliary sealing assembly (5) includes a connecting sleeve disposed on the connecting plate (13), and the connecting sleeve is concentrically arranged with the through hole at the center of the connecting plate (13). A tapered connector (51) is provided on the end face of the connecting sleeve, and the tapered connector (51) extends toward the pressure reducing valve and is inserted into the air inlet or exhaust port.

5. The valve pressure reduction performance testing device according to claim 4, characterized in that, The outer wall of the connecting sleeve is provided with an annular mounting groove. The mounting groove has multiple channels, and each mounting groove is embedded with a sealing airbag (52). The air supply pipes of the multiple sealing airbags (52) are interconnected and extend to the outside through the adjusting support (12).

6. The valve pressure reduction performance testing device according to claim 5, characterized in that, The outer side of the sealing airbag is provided with a corrugated protrusion, which is pressed against the inner wall of the air inlet or exhaust port to form multiple annular sealing bands.

7. The valve pressure reduction performance testing device according to claim 6, characterized in that, The pressure reducing valve on the side of the connecting plate (13) facing the mounting base (1) is also provided with an elastic pad (53), which is arranged in a ring shape and is concentrically arranged with the air inlet or exhaust port of the pressure reducing valve.

8. The valve pressure reduction performance testing device according to claim 7, characterized in that, The connecting plate (13) is also equipped with a pressure sensor and a gas pressure sensor. The pressure sensor is used to detect the pressure between the connecting plate (13) and the surface of the pressure reducing valve, and the gas pressure sensor is used to detect the gas pressure inside the sealing airbag (52).

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