Constant pressure type multi-stage pressure relief protection prying device
By designing a constant pressure multi-stage pressure relief protection skid device, and using multi-stage safety valves and sensors, the problems of low safety and high maintenance costs caused by reliance on a single safety valve are solved. This achieves multi-stage pressure protection and rapid response, improving the safety and reliability of high-pressure construction in the petroleum industry.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-04
- Publication Date
- 2026-03-24
AI Technical Summary
In current high-pressure construction in the petroleum industry, the reliance on single safety valves and sensors leads to low safety, delayed response, high maintenance costs, inability to cope with multi-stage overpressure risks, and lack of gradient control, posing safety hazards.
Design a constant pressure multi-stage pressure relief protection skid device, which includes multiple safety valves and pressure sensors. Through gradient pressure protection and graded pressure relief, it achieves multi-stage pressure protection, with fast response and stable reliability.
It achieves multi-level pressure protection, reduces safety hazards, extends equipment life, reduces maintenance costs, and improves the durability and safety of the device.
Smart Images
Figure CN224033582U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the pressure control technical field of petroleum industry, especially relates to a constant pressure multistage pressure relief protection pry device. BACKGROUND
[0002] In the petroleum industry, many operations involve high-pressure construction. In the traditional construction method, there is usually only one pressure monitoring method of installing a single pressure sensor and a single safety valve, which makes it too dependent on the long-term normal operation of the single safety valve and sensor. If one of them is damaged and cannot work normally, it will cause great inconvenience and safety hazards to the on-site construction and reduce the safety of the construction.
[0003] Among them, in the high-pressure manifold system, fluid pressure fluctuations, equipment failure or external impact may cause pipeline overpressure, leading to safety accidents such as leakage and explosion. The existing traditional technology is to use a single safety valve or a simple pressure relief device, which has the following problems: 1. Single protection level: only relying on a single safety valve, unable to cope with multi-stage overpressure risk under complex working conditions; 2. Response lag: mechanical safety valve action delay, difficult to quickly match pressure changes; 3. Lack of gradient control: the pressure relief process may be too violent, causing a sudden drop in pipeline pressure and affecting system stability; 4. High maintenance cost: regular manual maintenance is required. UTILITY MODEL CONTENTS
[0004] The utility model aims at the above-mentioned defects existing in the prior art, and provides a constant pressure multistage pressure relief protection pry device, which can realize multi-stage pressure protection, fast response and stable and reliable pressure protection function, reduce safety hazards and maintenance cost.
[0005] The utility model discloses a constant pressure multistage pressure relief protection pry device, which is characterized by comprising a pry frame, an upper door plate, a side door plate and a controller, the pry frame, the upper door plate and the side door plate form a protection pry box body, and the controller is installed in the protection pry box body. A high-pressure straight pipe, a low-stage safety valve, a middle-stage safety valve, a high-stage safety valve, an elbow assembly, a first plug valve, a second plug valve, a third plug valve, a straight pipe assembly, a first high-pressure T-shaped joint, a second high-pressure T-shaped joint and a third high-pressure T-shaped joint are installed on the pry frame. The first high-pressure T-shaped joint, the second high-pressure T-shaped joint and the third high-pressure T-shaped joint are installed between the high-pressure straight pipe and the outlet end of the high-pressure straight pipe. The first plug valve and the low-stage safety valve are connected to the outlet end of the first high-pressure T-shaped joint, and the outlet end of the low-stage safety valve is connected to the low-pressure straight pipe through the elbow assembly and the straight pipe assembly. The second plug valve and the middle-stage safety valve are connected to the outlet end of the second high-pressure T-shaped joint, and the outlet end of the middle-stage safety valve is connected to the low-pressure straight pipe through the elbow assembly and the straight pipe assembly. The third plug valve and the high-stage safety valve are connected to the outlet end of the third high-pressure T-shaped joint, and the outlet end of the high-stage safety valve is connected to the low-pressure straight pipe through the elbow assembly and the straight pipe assembly.
[0006] Preferably, the low-pressure straight pipe and the low-pressure straight pipe outlet end are provided with a first low-pressure T-shaped joint, a second low-pressure T-shaped joint and a third low-pressure T-shaped joint, the upper end of the first low-pressure T-shaped joint is connected with the low-stage safety valve through the straight pipe assembly and the elbow assembly, the upper end of the second low-pressure T-shaped joint is connected with the middle-stage safety valve through the straight pipe assembly and the elbow assembly, and the upper end of the third low-pressure T-shaped joint is connected with the high-stage safety valve through the straight pipe assembly and the elbow assembly.
[0007] Preferably, the first low-pressure T-shaped joint, the second low-pressure T-shaped joint, the third low-pressure T-shaped joint, the first high-pressure T-shaped joint, the second high-pressure T-shaped joint and the third high-pressure T-shaped joint are respectively provided with a pressure sensor.
[0008] Preferably, the low-stage safety valve, the middle-stage safety valve and the high-stage safety valve are connected with a controller through wires, and the opening pressure values of the low-stage safety valve, the middle-stage safety valve and the high-stage safety valve are increased in turn.
[0009] Preferably, the top of the protection pry box body is provided with a plurality of lifting lugs.
[0010] Preferably, the high-pressure straight pipe outlet end and the low-pressure straight pipe outlet end are respectively provided with a quick connector.
[0011] The utility model discloses the beneficial effect is: the utility model discloses through setting low-stage safety valve, middle-stage safety valve and high-stage safety valve of different pressure grades, realizes gradient pressure protection, avoids the problem of single safety valve protection failure, through the design of grading pressure relief, prevents the impact of pressure sudden drop to pipeline, prolongs equipment life, in addition, can reduce the abrasion caused by the frequent action of safety valve, improves the device durability, reduces the security risk, reduces the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;
[0013] Figure 2 It is the internal structure schematic diagram of the utility model;
[0014] Figure 3 It is Figure 2 the schematic diagram of A-A direction;
[0015] Figure 4 It is Figure 2 the structure schematic diagram of the overhead direction;
[0016] Figure 5 It is Figure 2 the schematic diagram of side shape of the utility model;
[0017] In the above figure: high-pressure straight pipe 1, pry frame 2, low-level safety valve 3, middle-level safety valve 4, high-level safety valve 5, elbow assembly 6, first low-pressure T joint 7, second low-pressure T joint 8, third low-pressure T joint 9, first plug valve 10, second plug valve 11, third plug valve 12, straight pipe assembly 13, controller 14, lifting lug 15, upper door plate 16, side door plate 17, high-pressure straight pipe outlet end 18, low-pressure straight pipe 19, low-pressure straight pipe outlet end 20, first high-pressure T joint 21, second high-pressure T joint 22, third high-pressure T joint 23. DETAILED DESCRIPTION
[0018] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model.
[0019] Embodiment 1, refer to Figures 1-5 The utility model refers to a kind of fixed pressure multi-stage pressure relief protection pry device, including pry frame 2, upper door plate 16, side door plate 17 and controller 14, pry frame 2, upper door plate 16 and side door plate 17 form protection pry box body, install controller 14 in protection pry box body, wherein, high-pressure straight pipe 1, low-level safety valve 3, middle-level safety valve 4, high-level safety valve 5, elbow assembly 6, first plug valve 10, second plug valve 11, third plug valve 12, straight pipe assembly 13, first high-pressure T joint 21, second high-pressure T joint 22, third high-pressure T joint 23 are installed on pry frame 2, first high-pressure T joint 21, second high-pressure T joint 22, third high-pressure T joint 23 are installed between high-pressure straight pipe 1 and high-pressure straight pipe outlet end 18, first plug valve 10 and low-level safety valve 3 are connected in the upper end outlet of first high-pressure T joint 21, the outlet end of low-level safety valve 3 is connected to low-pressure straight pipe 19 by elbow assembly 6 and straight pipe assembly 13;Second plug valve 11 and middle-level safety valve 4 are connected in the upper end outlet of second high-pressure T joint 22, the outlet end of middle-level safety valve 4 is connected to low-pressure straight pipe 19 by elbow assembly 6 and straight pipe assembly 13;Third plug valve 12 and high-level safety valve 5 are connected in the upper end outlet of third high-pressure T joint 23, the outlet end of high-level safety valve 5 is connected to low-pressure straight pipe 19 by elbow assembly 6 and straight pipe assembly 13.
[0020] Wherein, first low-pressure T joint 7, second low-pressure T joint 8 and third low-pressure T joint 9 are installed between low-pressure straight pipe 19 and low-pressure straight pipe outlet end 20, the upper end of first low-pressure T joint 7 is connected low-level safety valve 3 by straight pipe assembly 13 and elbow assembly 6, the upper end of second low-pressure T joint 8 is connected middle-level safety valve 4 by straight pipe assembly 13 and elbow assembly 6, the upper end of third low-pressure T joint 9 is connected high-level safety valve 5 by straight pipe assembly 13 and elbow assembly 6.
[0021] The first low-pressure T-joint 7, the second low-pressure T-joint 8, the third low-pressure T-joint 9, the first high-pressure T-joint 21, the second high-pressure T-joint 22 and the third high-pressure T-joint 23 are respectively provided with pressure sensors, and each pressure sensor is connected to the controller 14 through a wire.
[0022] The low-order safety valve 3, the middle-order safety valve 4 and the high-order safety valve 5 are connected to the controller 14 through wires respectively, and the opening pressure values of the low-order safety valve 3, the middle-order safety valve 4 and the high-order safety valve 5 are increased in turn, and each adopts a shear type safety valve, the opening pressure of the low-order safety valve 3 in the embodiment is set to 15Mpa, the opening pressure of the middle-order safety valve 4 is set to 25Mpa, and the opening pressure of the high-order safety valve 5 is set to 35Mpa.
[0023] The top of the protection pry box body is provided with a plurality of lifting lugs 15, so that the whole protection pry box body is convenient to hoist.
[0024] The high-pressure straight pipe outlet end 18 and the low-pressure straight pipe outlet end 20 are respectively provided with quick connectors, so that they are convenient to be quickly connected to external pipes.
[0025] In use, the utility model is hoisted to a high-pressure manifold system by a crane, the utility model is installed on a high-pressure pipeline, then the low-pressure straight pipe 19 is connected to a low-pressure pipeline for pressure relief. Under normal high-pressure construction conditions, the first plug valve 10, the second plug valve 11 and the third plug valve 12 keep the main path unobstructed respectively, the low-order safety valve 3, the middle-order safety valve 4 and the high-order safety valve 5 are in a closed state, and the manifold pressure is in a safe range. When fluid pressure fluctuation, equipment failure or external impact may cause overpressure of the high-pressure pipeline, if the pressure anomaly reaches the first overpressure, the low-order safety valve 3 is opened, the first bypass pressure relief is realized by being connected to the low-pressure straight pipe 19 through the elbow assembly 6 and the straight pipe assembly 13, and the opening degree of the first plug valve 10 is adjusted to balance the pressure. When the pressure anomaly reaches the second overpressure, the middle-order safety valve 4 is opened, the pressure relief capacity is enhanced, and the pressure continues to rise. When the pressure anomaly reaches the third overpressure, the high-order safety valve 5 is forced to open, and all the three bypasses are relieved, so that the safety of the high-pressure manifold system is ensured.
[0026] The utility model discloses a kind of fixed pressure multi-stage pressure relief protection crowbar devices, including crowbar 2, upper door plate 16, side door plate 17 and controller 14, crowbar 2, upper door plate 16 and side door plate 17 form protection crowbar box body, install controller 14 in protection crowbar box body, wherein, high-pressure straight pipe 1, low-order safety valve 3, middle-order safety valve 4, high-order safety valve 5, elbow assembly 6, first plug valve 10, second plug valve 11, third plug valve 12, straight pipe assembly 13, first high-pressure T joint 21, second high-pressure T joint 22, third high-pressure T joint 23 are installed on crowbar 2, first high-pressure T joint 21, second high-pressure T joint 22, third high-pressure T joint 23 are installed between high-pressure straight pipe 1 and high-pressure straight pipe outlet end 18, first plug valve 10 and low-order safety valve 3 are connected in the upper end outlet of first high-pressure T joint 21, and the outlet end of low-order safety valve 3 is connected to low-pressure straight pipe 19 by elbow assembly 6 and straight pipe assembly 13;Second plug valve 11 and middle-order safety valve 4 are connected in the upper end outlet of second high-pressure T joint 22, and the outlet end of middle-order safety valve 4 is connected to low-pressure straight pipe 19 by elbow assembly 6 and straight pipe assembly 13;Third plug valve 12 and high-order safety valve 5 are connected in the upper end outlet of third high-pressure T joint 23, and the outlet end of high-order safety valve 5 is connected to low-pressure straight pipe 19 by elbow assembly 6 and straight pipe assembly 13.
[0027] Different from embodiment 1 is:
[0028] The opening pressure of low-order safety valve 3 in the embodiment can be set to 10.3Mpa according to the needs of the scene, the opening pressure of middle-order safety valve 4 is set to 19.9Mpa, and the opening pressure of high-order safety valve 5 is set to 31.6Mpa, which can also realize the function of fixed pressure multi-stage pressure relief, and guarantee the safety of high-pressure manifold system.
[0029] The above is only the preferred embodiment of the utility model, and any skilled person in the art can modify the utility model using the above-described technical solutions or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent transformation according to the technical solutions of the utility model is within the scope of protection required by the utility model.
Claims
1. A constant pressure multi-stage pressure relief protection skid device, comprising a skid frame (2), an upper door panel (16), a side door panel (17), and a controller (14), wherein the skid frame (2), the upper door panel (16), and the side door panel (17) form a protection skid housing, and the controller (14) is installed inside the protection skid housing, characterized in that: The following components are installed on the skid (2): high-pressure straight pipe (1), low-level safety valve (3), medium-level safety valve (4), high-level safety valve (5), elbow assembly (6), first plug valve (10), second plug valve (11), third plug valve (12), straight pipe assembly (13), first high-pressure T-connector (21), second high-pressure T-connector (22), and third high-pressure T-connector (23). The first high-pressure T-connector (21), second high-pressure T-connector (22), and third high-pressure T-connector (23) are installed between the high-pressure straight pipe (1) and the outlet end (18) of the high-pressure straight pipe. The first plug valve is connected to the upper outlet of the first high-pressure T-connector (21). 10) and low-level safety valve (3), the outlet end of the low-level safety valve (3) is connected to the low-pressure straight pipe (19) through the elbow assembly (6) and the straight pipe assembly (13); the upper outlet of the second high-pressure T-connector (22) is connected to the second plug valve (11) and the intermediate safety valve (4), the outlet end of the intermediate safety valve (4) is connected to the low-pressure straight pipe (19) through the elbow assembly (6) and the straight pipe assembly (13); the upper outlet of the third high-pressure T-connector (23) is connected to the third plug valve (12) and the high-level safety valve (5), the outlet end of the high-level safety valve (5) is connected to the low-pressure straight pipe (19) through the elbow assembly (6) and the straight pipe assembly (13).
2. The constant pressure multi-stage pressure relief protection skid device according to claim 1, characterized in that: A first low-pressure T-connector (7), a second low-pressure T-connector (8), and a third low-pressure T-connector (9) are installed between the low-pressure straight pipe (19) and the outlet end (20) of the low-pressure straight pipe. The upper end of the first low-pressure T-connector (7) is connected to the low-level safety valve (3) through the straight pipe assembly (13) and the elbow assembly (6). The upper end of the second low-pressure T-connector (8) is connected to the intermediate-level safety valve (4) through the straight pipe assembly (13) and the elbow assembly (6). The upper end of the third low-pressure T-connector (9) is connected to the high-level safety valve (5) through the straight pipe assembly (13) and the elbow assembly (6).
3. The constant pressure multi-stage pressure relief protection skid device according to claim 2, characterized in that: Pressure sensors are installed in the first low-pressure T-connector (7), the second low-pressure T-connector (8), the third low-pressure T-connector (9), the first high-pressure T-connector (21), the second high-pressure T-connector (22), and the third high-pressure T-connector (23), respectively.
4. A constant pressure multi-stage pressure relief protection skid device according to claim 3, characterized in that: The low-level safety valve (3), the medium-level safety valve (4) and the high-level safety valve (5) are respectively connected to the controller (14) through wires, and the opening pressure values of the low-level safety valve (3), the medium-level safety valve (4) and the high-level safety valve (5) increase sequentially.
5. A constant pressure multi-stage pressure relief protection skid device according to claim 1, characterized in that: The top of the protective pry box is provided with multiple lifting lugs (15).
6. A constant pressure multi-stage pressure relief protection skid device according to claim 1, characterized in that: The high-pressure straight pipe outlet end (18) and the low-pressure straight pipe outlet end (20) are respectively provided with quick connectors.