Safety valve pressure adjusting device
By designing a safety valve pressure regulating device, which uses an air source and a pressure gauge to monitor air pressure, and combines a screw and a return spring to adjust the opening pressure of the safety valve, the problems of low efficiency and large error in batch testing of safety valves are solved. This enables rapid and accurate pressure adjustment and recording, ensuring the reliability of the safety valve.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-28
- Publication Date
- 2026-04-07
AI Technical Summary
In the existing technology, the batch testing efficiency of safety valves is low, the manual adjustment error is large, and the data recording is not convenient for analysis, resulting in inaccurate and unreliable opening pressure of safety valves.
A safety valve pressure regulating device was designed, including a base, a mounting plate, a safety valve lower shell, an air source, and a pressure gauge. The top of the base is sealed by the mounting plate, air pressure is supplied by the air source and monitored by the pressure gauge, and the opening pressure of the safety valve is adjusted by a screw and a return spring. Rubber rings and sealant are used to prevent leakage, enabling rapid adjustment and accurate recording.
It enables rapid adjustment and accurate recording of the safety valve opening pressure, improving testing efficiency and data accuracy, and ensuring the reliability of the safety valve and the safe operation of the system.
Smart Images
Figure CN224093912U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of safety valve opening pressure measurement, and in particular to a safety valve pressure regulating device. Background Technology
[0002] As an important safety protection device, safety relief valves are widely used in industries such as petrochemicals, power, gas, and pharmaceuticals. They are used to prevent pipelines, containers, or equipment from exploding or being damaged due to excessive pressure. The core function of a safety relief valve is to automatically open and release pressure when the system pressure exceeds a preset threshold, and close it after the pressure returns to normal, thereby ensuring the safety of equipment and personnel. Therefore, the opening pressure of the safety valve must be accurate and reliable, and its performance is directly related to the safe operation of the entire system.
[0003] Currently, in industrial settings, it is often necessary to perform batch testing or calibration of multiple safety valves. However, traditional devices typically only support testing of a single valve, which is inefficient. Furthermore, some tests rely on manual adjustment by "loosening the left and tightening the right" by half a turn or other fixed number of turns. This results in large operational errors and makes data recording inconvenient for subsequent analysis. Therefore, it is necessary to design a safety valve pressure regulating device. Utility Model Content
[0004] The purpose of this invention is to provide a safety valve pressure regulating device to solve the problems existing in the prior art.
[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:
[0006] A safety valve pressure regulating device, comprising:
[0007] The base is a shell with a completely open top. An air inlet is provided on the right side of the top of the base, which communicates with the interior of the base. An air outlet is provided on the left side of the top of the base, which communicates with the interior of the base.
[0008] Mounting plate, which is fixedly installed on the top of the base, is used to completely enclose the top of the base. The top of the mounting plate is evenly provided with a plurality of mounting holes that communicate with the interior of the base.
[0009] The lower housing of the safety valve is fixedly installed in the mounting hole. The lower housing of the safety valve is used to install the body of the safety valve. The body of the safety valve and the lower housing of the safety valve together form a safety relief valve.
[0010] An air source, which is connected to the air inlet of the base via an air supply pipe;
[0011] And a pressure gauge, which is used to detect the air pressure inside the base through the air outlet.
[0012] By adopting the above technical solution, the air source supplies air into the base, the mounting plate completely seals the top of the base, and the lower shell of the safety valve is installed in multiple mounting holes at the top of the mounting plate, so that the air source in the base can only be discharged outward through the lower shell of the safety valve. The pressure gauge is used to monitor the air pressure inside the base at all times so as to record the opening pressure of the safety relief valve at any time.
[0013] In a further embodiment, the lower housing of the safety valve is a frustum-shaped housing with a completely open top, and the large-diameter end of the lower housing of the safety valve is located at the top. A threaded hole is provided at the center of the bottom of the lower housing of the safety valve, and a plurality of vent holes communicating with the interior of the base are uniformly arranged axially at the bottom of the lower housing of the safety valve.
[0014] The safety valve body includes:
[0015] The cover has a completely open bottom and a through-hole at the center of the top.
[0016] A screw rod passes through the central circular hole and threaded hole at the top of the cover from top to bottom. A sealing ring is slidably installed at the bottom end of the screw rod, and the bottom of the sealing ring is in contact with the inner bottom of the lower housing of the safety valve. A pressure ring is sleeved on the top end of the screw rod inside the cover. A return spring is sleeved on the screw rod inside the cover. The top end of the return spring is pressed against the bottom of the pressure ring, and the bottom end of the return spring is pressed against the top of the sealing ring.
[0017] By adopting the above technical solution, when the air pressure inside the base is less than the elastic force applied to the sealing ring by the return spring, the air pressure cannot lift the sealing ring, and the valve opening pressure of the safety relief valve cannot be detected. At this time, it is necessary to rotate the screw to reduce the deformation of the return spring. When the return spring is adjusted to a certain height, the air pressure is greater than the elastic force applied to the sealing ring by the return spring, and the air pressure lifts the sealing ring, thereby allowing the air pressure to be discharged from the lower shell of the safety valve. At this time, the pressure relief of the safety relief valve is completed. When the air pressure is released to a certain extent, when the air pressure inside the base does not exceed the elastic force applied to the sealing ring by the return spring, the sealing ring will automatically reset under the action of the return spring and fit against the inner bottom of the lower shell of the safety valve.
[0018] In a further embodiment, a limiting protrusion is provided at the bottom end of the central circular hole at the top of the cover.
[0019] By adopting the above technical solution, the limiting protrusion restricts the screw to only move upward within a certain range.
[0020] In a further embodiment, a rubber ring is also included. The rubber ring is disposed at the bottom of the mounting plate, and the bottom of the rubber ring is in contact with the top of the base. The top of the base is uniformly provided with a plurality of first threaded holes. The top periphery of the mounting plate is provided with through holes corresponding to the plurality of first threaded holes. The mounting plate is bolted and fixed to the top of the base. The rubber ring is located between the top of the base and the bottom of the mounting plate. The rubber ring is used to seal the contact surfaces of the top of the base and the bottom of the mounting plate.
[0021] By adopting the above technical solution, the rubber ring can effectively prevent air pressure from leaking out from the base and mounting plate, thereby improving the accuracy of the pressure value of the safety relief valve.
[0022] In a further embodiment, a rubber ring is also included. The top end of the lower housing of the safety valve is provided with a centrifugal extension edge, and a plurality of round holes are uniformly arranged axially on the extension edge. The top of the mounting plate is provided with a second threaded hole corresponding to the plurality of round holes. The lower housing of the safety valve is bolted and fixed to the top of the mounting plate, and the bottom end of the second threaded hole does not penetrate the mounting plate. The rubber ring is sleeved on the top end of the lower housing of the safety valve, and the top of the rubber ring is in contact with the bottom of the extension edge, and the bottom of the rubber ring is in contact with the top of the mounting plate.
[0023] In a further embodiment, the top of the base is coated with sealant around the contact surface with the mounting plate, and the connection between the lower housing of the safety valve and the mounting plate is coated with sealant around the periphery.
[0024] In summary, this utility model has the following beneficial effects:
[0025] 1. By setting a mounting plate at the top of the base, with multiple mounting holes at the top of the mounting plate, the lower shell of the safety valve is installed in the mounting holes, and the main body of the safety valve is installed in the lower shell of the safety valve, which can achieve the effect of quickly adjusting the opening pressure of the main body of the safety valve. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0027] Figure 2 This is a schematic diagram illustrating the internal structure of the safety relief valve of this utility model.
[0028] In the diagram, 1 is the base; 2 is the mounting plate; 3 is the lower shell of the safety valve; 4 is the body of the safety valve; 41 is the cover; 42 is the screw; 5 is the air source; 6 is the air pressure gauge; 7 is the return spring; 8 is the sealing ring; and 9 is the pressure ring. Detailed Implementation
[0029] The present invention will be further described in detail below with reference to the accompanying drawings.
[0030] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.
[0031] Example 1:
[0032] like Figures 1-2As shown, a safety valve pressure regulating device includes: a base 1, a mounting plate 2, a safety valve lower shell 3, an air source 5, and a pressure gauge 6. The base 1 is a shell with a completely open top. An air inlet communicating with the interior of the base 1 is provided on the right side of the top of the base 1, and an air outlet communicating with the interior of the base 1 is provided on the left side of the top of the base 1. The mounting plate 2 is fixedly installed on the top of the base 1, and is used to completely close the top of the base 1. Multiple mounting holes communicating with the interior of the base 1 are evenly provided on the top of the mounting plate 2. The safety valve lower shell 3 is fixedly installed in the mounting holes and is used to install the safety valve body 4. The safety valve body 4 and the safety valve lower shell 3 constitute a safety pressure relief valve. The air source 5 is connected to the air inlet of the base 1 through an air supply pipe. The pressure gauge 6 is used to detect the air pressure inside the base 1 through the air outlet. The safety valve lower shell 3 is a frustum-shaped shell with a completely open top, and the large diameter end of the safety valve lower shell 3 is located at the top. A threaded hole is provided at the center of the bottom of the safety valve lower shell 3. Multiple vent holes communicating with the inside of the base 1 are evenly arranged axially at the bottom of the safety valve lower shell 3. The safety valve body 4 includes: a cover 41 and a screw 42. The bottom end of the cover 41 is completely open. A through-hole is provided at the center of the top of the cover 41. Multiple air outlets are evenly arranged at the top of the cover 41 for releasing the air pressure inside the cover 41. The screw 42 passes through the center hole at the top of the cover 41 from top to bottom and is screwed into the threaded hole. The bottom of the screw 42... A sealing ring 8 is slidably installed at the end, with its bottom fitting against the inner bottom of the lower housing 3 of the safety valve. A pressure ring 9 located inside the cover 41 is fitted onto the top of the screw 42. A return spring 7 located inside the cover 41 is fitted onto the screw 42, with its top end abutting against the bottom of the pressure ring 9 and its bottom end abutting against the top of the sealing ring 8. A limit protrusion is provided at the bottom end of the central circular hole at the top of the cover 41. A rubber ring is provided at the bottom of the mounting plate 2, with its bottom fitting against the top of the base 1. Multiple first threaded holes are evenly arranged around the top of the base 1. Through holes corresponding to the multiple first threaded holes are provided around the top periphery of the mounting plate 2. The mounting plate 2 is bolted and fixed to the top of the base 1. Located between the top of the base 1 and the bottom of the mounting plate 2, a rubber ring is used to seal the contact surfaces of the top of the base 1 and the bottom of the mounting plate 2. The top of the safety valve lower shell 3 is provided with a centrifugal extension edge, on which multiple round holes are evenly arranged axially. The top of the mounting plate 2 is provided with a second threaded hole corresponding to the multiple round holes. The safety valve lower shell 3 is bolted and fixed to the top of the mounting plate 2, and the bottom end of the second threaded hole does not penetrate the mounting plate 2. The rubber ring is fitted on the top of the safety valve lower shell 3, and the top of the rubber ring is in contact with the bottom of the extension edge. The bottom of the rubber ring is in contact with the top of the mounting plate 2. The contact surfaces of the top of the base 1 and the mounting plate 2 are coated with sealant. The connection between the safety valve lower shell 3 and the mounting plate 2 is coated with sealant.
[0033] Specific implementation process: When using it, first place the rubber ring on the top of the base 1, then cover it with the mounting plate 2, and lock the mounting plate 2 on the top of the base 1 with bolts. Finally, apply sealant to the top periphery of the base 1.
[0034] Next, place multiple rubber rings on the mounting plate 2, with each rubber ring corresponding to a mounting hole. Adjust the rubber rings to be approximately coaxial with the mounting holes. Then, install multiple safety valve lower shells 3 one by one into the mounting holes. When pressing down on the safety valve lower shell 3, the safety valve lower shell 3 gradually becomes coaxial with the mounting holes and rubber rings. Finally, lock the safety valve lower shell 3 onto the mounting plate 2 with bolts. Similarly, apply sealant around the connection between the safety valve lower shell 3 and the mounting plate 2.
[0035] Because the top of the return spring 7 is pressed against the bottom end face of the pressure ring 9 at the top of the screw 42, the return spring 7 will have elastic force when the distance between the bottom end face of the pressure ring 9 and the top of the sealing ring 8 is less than the length of the return spring 7 in the free state. The greater the compressed length of the return spring 7, the greater the elastic force. The pressure applied to the sealing ring 8 by the return spring 7 is adjusted by adjusting the distance between the bottom end face of the pressure ring 9 and the top of the sealing ring 8. The return spring 7 makes the sealing ring 8 pressed tightly against the inner bottom of the lower shell 3 of the safety valve.
[0036] Air pressure is supplied to the interior of the base 1 through the air source 5. The air pressure can only be discharged outward through the exhaust port of the lower shell 3 of the safety valve. However, because the return spring 7 applies pressure to the sealing ring 8, the sealing ring 8 completely blocks the exhaust port. Therefore, the air pressure will only be discharged from the exhaust port when the pressure inside the base 1 is greater than the pressure applied to the sealing ring 8 by the return spring 7. When the pressure inside the base 1 is less than or equal to the pressure applied to the sealing ring 8 by the return spring 7, the air pressure cannot lift the sealing ring 8 and cannot be discharged outward. Rotating the screw 42 can increase or decrease the deformation length of the return spring 7. By adjusting the extension length of the return spring 7, the pressure relief pressure of each safety valve body 3 can reach the required set value.
[0037] To more intuitively observe whether the safety valve body 3 is depressurizing under the rated pressure, after installing the safety valve body 3 on the safety valve lower shell 3, spray bubble solution onto the top of the safety valve body 4. By reading the value of the air pressure gauge 6 on the left side of the base 1 and cooperating with the air source 5, the internal pressure of the base 1 is made to reach the rated pressure. If bubbles appear before reaching the rated pressure, the screw 42 needs to be tightened to increase the deformation value of the return spring 7. If bubbles do not appear after reaching the rated pressure, the screw 42 needs to be loosened to reduce the deformation value of the return spring 7. After adjustment, remove the sealant around the safety valve lower shell 3 and remove the safety valve lower shell 3 from the mounting plate 2. This yields a safety relief valve that has been adjusted and its depressurization pressure has been calibrated.
[0038] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.
[0039] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.
Claims
1. A safety valve pressure regulating device, characterized in that, include: The base (1) is a shell with its top completely open. An air inlet is provided on the right side of the top of the base (1) and an air outlet is provided on the left side of the top of the base (1) and a communication with the interior of the base (1). Mounting plate (2), which is fixedly installed on the top of the base (1), is used to completely close the top of the base (1), and the top of the mounting plate (2) is evenly provided with a plurality of mounting holes communicating with the interior of the base (1). Safety valve lower shell (3), the safety valve lower shell (3) is fixedly installed in the mounting hole, the safety valve lower shell (3) is used to install the safety valve body (4), the safety valve body (4) and the safety valve lower shell (3) form a safety relief valve; Air source (5), the air source (5) is connected to the air inlet of the base (1) through an air supply pipe; And a pressure gauge (6), which is used to detect the air pressure inside the base (1) through the air outlet.
2. The safety valve pressure regulating device according to claim 1, characterized in that, The safety valve lower shell (3) is a frustum-shaped shell with a completely open top, and the large diameter end of the safety valve lower shell (3) is located at the top. A threaded hole is provided at the center of the bottom of the safety valve lower shell (3). Multiple exhaust holes that communicate with the interior of the base (1) are uniformly arranged axially at the bottom of the safety valve lower shell (3). The safety valve body (4) includes: Cover (41), the bottom end of the cover (41) is completely open, and a circular hole that runs through the top and bottom is provided at the center of the top of the cover (41); The screw (42) passes through the central hole and threaded hole at the top of the cover (41) from top to bottom. A sealing ring (8) is slidably installed at the bottom end of the screw (42). The bottom of the sealing ring (8) is in contact with the inner bottom of the lower shell (3) of the safety valve. A pressure ring (9) located inside the cover (41) is sleeved on the top end of the screw (42). A return spring (7) located inside the cover (41) is sleeved on the screw (42). The top end of the return spring (7) is pressed against the bottom of the pressure ring (9), and the bottom end of the return spring (7) is pressed against the top of the sealing ring (8).
3. The safety valve pressure regulating device according to claim 2, characterized in that: A limiting protrusion is provided at the bottom end of the central circular hole at the top of the cover (41).
4. The safety valve pressure regulating device according to claim 3, characterized in that: It also includes a rubber ring, which is set at the bottom of the mounting plate (2) and the bottom of the rubber ring is in contact with the top of the base (1). The top of the base (1) is uniformly provided with a plurality of first threaded holes, and the top periphery of the mounting plate (2) is provided with through holes corresponding to the plurality of first threaded holes. The mounting plate (2) is bolted to the top of the base (1), and the rubber ring is located between the top of the base (1) and the bottom of the mounting plate (2). The rubber ring is used to seal the contact surfaces of the top of the base (1) and the bottom of the mounting plate (2).
5. A safety valve pressure regulating device according to claim 2, characterized in that: It also includes a rubber ring. The top of the lower housing (3) of the safety valve is provided with a centrifugal extension edge. Multiple round holes are uniformly arranged axially on the extension edge. The top of the mounting plate (2) is provided with a second threaded hole corresponding to the multiple round holes. The lower housing (3) of the safety valve is bolted and fixed to the top of the mounting plate (2). The bottom end of the second threaded hole does not penetrate the mounting plate (2). The rubber ring is sleeved on the top of the lower housing (3) of the safety valve. The top of the rubber ring is in contact with the bottom of the extension edge. The bottom of the rubber ring is in contact with the top of the mounting plate (2).
6. A safety valve pressure regulating device according to claim 2, characterized in that: The top of the base (1) and the periphery of the mating surface of the mounting plate (2) are coated with sealant, and the periphery of the connection between the lower shell (3) of the safety valve and the mounting plate (2) is coated with sealant.