Pressure release valve of compressor
The mechanical overpressure relief valve solved the problem of uneconomical operation of the compressor caused by frequent start-stop of the pneumatic hammer, achieving stable operation and improved reliability of the compressor, and reducing control costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-07
AI Technical Summary
Existing compressors in mining projects often start and stop frequently due to the frequent start-stop of pneumatic picks, resulting in frequent loading and unloading and operation in non-economic speed ranges. Furthermore, existing pressure relief solenoid valves have short service life and poor reliability in harsh environments, and are complex and costly to control.
A mechanical overpressure relief valve is adopted. Through the cooperation of the valve core and spring, the valve port is automatically opened to relieve pressure when the pressure in the oil separator exceeds the set value, thus realizing a mechanical overpressure relief mechanism. The structure is simple, the reliability is high, and the control cost is reduced.
This enables stable operation of the compressor when the gas consumption at the output end is unstable, avoids frequent start-stop or loading/unloading, reduces oil consumption and control costs, and improves equipment reliability and system performance.
Smart Images
Figure CN224093911U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pressure relief valve technical field, especially a kind of pressure relief valve of compressor. BACKGROUND
[0002] In the field of mine engineering, diesel mobile air compressor plays a key role as core power equipment. The high-pressure oil-gas mixture generated by the compressor enters the oil separation bucket, and the oil separation bucket provides compressed air to its matched air pick after oil-gas separation. The air pick belongs to reciprocating pneumatic impact tool, which converts the compressed air output by the oil separation bucket into piston high-frequency impact energy through the built-in air distribution mechanism, which is used for breaking hard materials such as rock and concrete. In the process of mine excavation, roadway support and other operations, the number of air picks connected to a compressor is not fixed, and each air pick independently realizes start-stop control. Due to the influence of factors such as the hardness difference of each work point and different construction process requirements, the actual working time and load state (idling, light load impact, full load breaking) of a single air pick show significant stage characteristics. The stage characteristics of the air pick can cause the compressor to frequently start and stop or frequently load and unload, and thus the compressor always operates in a non-economic speed range, resulting in high oil consumption.
[0003] In the prior art, the problem is usually solved by setting a pressure relief solenoid valve on the oil separation bucket, so that the compressor can always operate in an economic speed range. When the output of the compressor is unstable (i.e. when the air pick starts and stops or the load state changes), the compressor will not frequently start and stop or frequently load and unload, but will use the pressure relief solenoid valve to relieve the pressure of the oil separation bucket. Using the pressure relief solenoid valve to relieve the pressure of the oil separation bucket has the following defects: on the one hand, the diameter of the pressure relief solenoid valve is generally small, which limits the flow, and the pressure relief operation cannot be completed quickly in actual working conditions, which affects the overall performance of the system; on the other hand, the working environment of mine machinery is harsh, with a lot of dust and high humidity. As an electronic component, the service life of the pressure relief solenoid valve will be greatly shortened in such an environment, and the reliability cannot be guaranteed, which will affect the normal operation of the equipment due to frequent failures. In addition, to effectively control the pressure relief solenoid valve, an additional control program is required, which increases the complexity of the system and significantly increases the control cost.
[0004] Therefore, it is necessary to improve the prior art. INVENTION CONTENTS
[0005] The utility model aims at the defects and deficiencies of the prior art, and provides a pressure relief valve of compressor, which adopts a mechanical overpressure relief mechanism, has the characteristics of simple and reasonable structure and high pressure relief reliability, can reduce control cost, and has obvious practical value.
[0006] In order to achieve the above object, the utility model adopts the following technical scheme:
[0007] A pressure relief valve of a compressor, comprising a valve body, a valve cavity is arranged in the valve body, an air inlet and an air outlet are arranged on the valve body and are communicated with the valve cavity respectively, the air inlet is communicated to an oil separation bucket of the compressor, the air outlet is communicated with the atmosphere, a valve port is arranged between the air inlet and the air outlet, a valve core corresponding to the valve port and a spring corresponding to the valve core are movably arranged in the valve cavity, the spring is abutted with the valve core, so that the valve core always has a movement tendency of closing the valve port, when the pressure in the oil separation bucket exceeds a set value, compressed gas enters the valve cavity from the air inlet, so that the valve core moves away from the valve port against the elastic force of the spring to open the valve port.
[0008] Further, the valve core has a plugging part corresponding to the valve port, and the spring is abutted with the plugging part.
[0009] Further, a first O-shaped sealing ring is arranged between the plugging part and the valve port.
[0010] Further, the valve body is provided with an end cover for plugging the valve cavity, and a second O-shaped sealing ring is arranged between the end cover and the valve body.
[0011] Further, the valve core has a first sleeve part, the end cover is provided with a second sleeve part movably sleeved with the first sleeve part, and the first sleeve part and the second sleeve part are matched to form an inner cavity, and the spring is sleeved on the outer periphery of the first sleeve part and the second sleeve part.
[0012] Further, the valve core is provided with a first breathing hole for communicating the inner cavity and the valve cavity, and the end cover is provided with a second breathing hole for communicating the inner cavity and the valve cavity.
[0013] Further, the end cover is provided with a containing groove matched with the outer peripheral size of the spring.
[0014] Further, the first sleeve part and the plugging part are detachably fixedly connected through bolts, and a third O-shaped sealing ring is arranged between the first sleeve part and the plugging part.
[0015] Further, the plugging part comprises a first plugging block and a second plugging block, and the first plugging block and the second plugging block are matched to form a mounting groove for mounting the first O-shaped sealing ring.
[0016] Further, one side of the plugging part towards the spring is provided with an annular groove for positioning the end part of the spring.
[0017] With the above structure, the utility model has beneficial effects that: the utility model discloses a pressure relief valve of compressor, including valve body, be provided with valve cavity in the valve body, be provided with the air inlet and exhaust port that communicates with valve cavity respectively on the valve body, the air inlet communicates to the oil separation bucket of compressor, the exhaust port communicates with the atmosphere, be provided with the valve port between the air inlet and exhaust port, the valve cavity is movably provided with the valve core that cooperates with the valve port and the spring that cooperates with the valve core, the spring is with the valve core, so that the valve core always has the movement tendency of closing the valve port, when the pressure in the oil separation bucket exceeds the set value, compressed gas enters the valve cavity from the air inlet, so that the valve core overcomes the elastic force of spring and moves to the direction of far from the valve port, to open the valve port, the utility model discloses that the oil separation bucket is effectively pressure released to the pressure relief valve, and the pressure relief valve adopts mechanical type overpressure pressure relief mechanism, has simple and reasonable structure, the characteristics such as high pressure relief reliability, can reduce control cost simultaneously, has remarkable practical value, through the setting of pressure relief valve, when the output end of compressor is unstable, such as wind pick starts or load state changes, compressor will not appear frequent start-stop or frequent loading and unloading operation during the operation of compressor. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the specific embodiment of the present application, the following will be a brief description of the drawings needed to be used in the specific embodiment, obviously, the drawings in the following description is some embodiments of the present application, for those skilled in the art, without creative labor, according to these drawings, other drawings can also be obtained.
[0019] Figure 1 It is the overall structure schematic view of the pressure relief valve of the utility model;
[0020] Figure 2 It is the overall structure sectional view of the pressure relief valve of the utility model;
[0021] Figure 3 It is the A structure enlarged schematic view of the utility model; Figure 2
[0022] Figure 4 It is the sectional view of the valve body of the utility model;
[0023] Figure 5 It is the sectional view of the end cover of the utility model;
[0024] Figure 6 It is the sectional view of the valve core of the utility model;
[0025] Figure 7 It is the cooperation connection schematic view of the pressure relief valve, oil separation bucket and compressor of the utility model.
[0026] Figures 1 to 7 Reference Signs:
[0027] 1, valve body; 11, valve cavity; 12, air inlet; 13, air outlet; 14, valve port; 15, end cover; 151, second sleeve part; 152, second breathing hole; 153, accommodating groove; 2, spring; 3, valve core; 31, blocking part; 311, first blocking block; 312, second blocking block; 313, mounting groove; 32, first sleeve part; 321, inner cavity; 33, first breathing hole; 34, bolt; 35, annular groove; 4, first O-shaped sealing ring; 5, second O-shaped sealing ring; 6, third O-shaped sealing ring; 100, pressure relief valve; 200, compressor; 300, oil separation bucket. DETAILED DESCRIPTION
[0028] In order to make the above-mentioned purpose, characteristics and advantages of the utility model more apparent, obvious and easy to understand, the specific embodiments of the utility model are described in detail below. In the following description, a large number of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0029] In the description of the utility model, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0030] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, if the term "a plurality of" appears, the meaning of the term "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.
[0031] In the utility model, unless another definite provision and limitation, if there is the term " install ", " link ", " connect ", " fix " and so on, these terms should be broad sense understanding. For example, can be fixed connection, also can be detachable connection, or be integrated, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements, unless another definite limitation. For ordinary skilled in the art, can understand the concrete meaning of the above terms in the utility model according to specific circumstances.
[0032] In the utility model, unless another definite provision and limitation, if there is the term " install ", " link ", " connect ", " fix " and so on, these terms should be broad sense understanding. For example, can be fixed connection, also can be detachable connection, or be integrated, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements, unless another definite limitation. For ordinary skilled in the art, can understand the concrete meaning of the above terms in the utility model according to specific circumstances.
[0033] It should be noted that if an element is referred to as " fixed to " or " disposed on " another element, it can be directly on the other element or there can be intervening elements. If an element is referred to as " connected " to another element, it can be directly connected to the other element or intervening elements can be present. Unless otherwise stated, the terms "vertical", "horizontal", "top", "bottom", "left", "right" and the like as can be used herein are made only with reference to the exemplary illustrations as shown in the drawings and are merely used for description.
[0034] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below with reference to the drawings and in combination with embodiments.
[0035] As Figures 1 to 7As shown, a pressure relief valve of a compressor comprises a valve body 1, a valve cavity 11 is arranged in the valve body 1, an air inlet 12 and an air outlet 13 are arranged on the valve body 1 and communicated with the valve cavity 11 respectively, the air inlet 12 is communicated to an oil separation bucket 300 of the compressor 200, the air outlet 13 is communicated with the atmosphere, a valve port 14 is arranged between the air inlet 12 and the air outlet 13, a valve core 3 corresponding to the valve port 14 and a spring 2 corresponding to the valve core 3 are movably arranged in the valve cavity 11, the spring 2 abuts against the valve core 3, so that the valve core 3 always has a movement tendency of closing the valve port 14; when the pressure in the oil separation bucket 300 exceeds a set value, compressed gas enters the valve cavity 11 from the air inlet 12, so that the valve core 3 moves away from the valve port 14 against the elastic force of the spring 2, to open the valve port 14.
[0036] Based on the above embodiment, the utility model wants to solve is provide a kind of pressure relief valve of compressor, comprising valve body 1, valve cavity 11 is arranged in the valve body 1, air inlet 12 and air outlet 13 are arranged on the valve body 1 and communicated with the valve cavity 11 respectively, the air inlet 12 is communicated to the oil separation bucket 300 of the compressor 200, the air outlet 13 is communicated with the atmosphere, valve port 14 is arranged between the air inlet 12 and the air outlet 13, valve core 3 corresponding to the valve port 14 and spring 2 corresponding to the valve core 3 are movably arranged in the valve cavity 11, the spring 2 abuts against the valve core 3, so that the valve core 3 always has a movement tendency of closing the valve port 14;When the pressure in the oil separation bucket 300 exceeds a set value, compressed gas enters the valve cavity 11 from the air inlet 12, so that the valve core 3 moves away from the valve port 14 against the elastic force of the spring 2, to open the valve port 14.The utility model adopts pressure relief valve 100 to effectively pressure relief to oil separation bucket 300, and pressure relief valve 100 adopts mechanical type overpressure pressure relief mechanism, with the characteristics of simple structure and high reliability, while being able to reduce control cost, with significant practical value.Through the setting of pressure relief valve 100, when the output end of compressor 200 is unstable, such as wind pick starts or load state changes, compressor 200 will not appear frequent start-stop or frequent load operation during the operation of compressor 200.
[0037] In the embodiment, the working process of the pressure relief valve 100 is as follows: during the operation of the compressor 200, when the output of the compressor 200 decreases, such as when part of the picks are stopped or unloaded, the pressure in the oil separation bucket 300 increases because the compressor 200 is always in an operating state (in order to make the compressor 200 always operate in the economic speed range, reduce oil consumption). At this time, the compressed gas enters the valve cavity 11 from the gas inlet 12, so that the valve core 3 overcomes the elastic force of the spring 2 and moves away from the valve port 14 until the valve port 14 is opened. After the valve port 14 is opened, the gas inlet 12 is in communication with the gas outlet 13, and the compressed gas is discharged from the gas inlet 12, the valve port 14 and the gas outlet 13 to the atmosphere, thereby achieving pressure relief of the oil separation bucket 300. When the pressure in the oil separation bucket 300 decreases, the valve core 3 moves towards the valve port 14 under the elastic force of the spring 2 until the valve port 14 is closed, thereby achieving pressure maintenance of the oil separation bucket 300.
[0038] As another preferred embodiment of the utility model, the valve core 3 has a first sleeve part 32, the end cover 15 is provided with a second sleeve part 151 movably sleeved with the first sleeve part 32, the first sleeve part 32 and the second sleeve part 151 cooperate to form an inner cavity 321, and the spring 2 is sleeved on the outer periphery of the first sleeve part 32 and the second sleeve part 151. The valve core 3 is provided with a first breathing hole 33 for communicating the inner cavity 321 and the valve cavity 11, and the end cover 15 is provided with a second breathing hole 152 for communicating the inner cavity 321 and the valve cavity 11. The valve core 3 has a plugging part 31 corresponding to the valve port 14, and the spring 2 abuts against the plugging part 31. The first sleeve part 32 and the plugging part 31 are detachably fixedly connected by a bolt 34, and a third O-shaped sealing ring 6 is arranged between the first sleeve part 32 and the plugging part 31. The plugging part 31 comprises a first plugging block 311 and a second plugging block 312, and the first plugging block 311 and the second plugging block 312 cooperate to form a mounting groove 313 for mounting the first O-shaped sealing ring 4.
[0039] In the embodiment, as shown in Figure 2 and Figure 3 The length of the first sleeve part 32 is less than the length of the second sleeve part 151, thereby realizing the relative movement of the valve core 3 relative to the end cover 15. The first sleeve part 32 and the second sleeve part 151 cooperate to realize the guiding effect of the spring 2, avoiding problems such as skewing and misalignment of the spring 2 when the valve core 3 moves. As shown in Figure 5 and Figure 6As shown, the first breathing hole 33 and the second breathing hole 152 are arranged to realize the communication between the valve cavity 11 and the inner cavity 321, so that the movement of the valve core 3 relative to the end cover 15 is more smooth. In the embodiment, the closing and opening of the valve port 14 by the sealing part 31 and the spring 2 are realized; the valve core 3 exerts pressure on the spring 2, thereby realizing the opening of the valve port 14 by the valve core 3, or the spring 2 exerts elastic force on the valve core 3, thereby realizing the closing of the valve port 14 by the valve core 3. The first sleeve part 32 and the sealing part 31 of the valve core 3 are detachably connected, which facilitates the machining and assembly of the valve core 3 and is beneficial to saving cost. The third O-shaped sealing ring 6 is arranged to improve the air tightness between the first sleeve part 32 and the sealing part 31. The first sealing block 311 and the second sealing block 312 are cooperatively formed with a mounting groove 313 for mounting the first O-shaped sealing ring 4, and the design of the mounting groove 313 makes the mounting of the first O-shaped sealing ring 4 more reliable, and the structure design is more convenient for the machining of the mounting groove 313, thereby reducing the machining cost.
[0040] As another preferred scheme of the utility model, the sealing part 31 and the valve port 14 are provided with the first O-shaped sealing ring 4. In the embodiment, as shown in Figure 2 and Figure 3 As shown, the first O-shaped sealing ring 4 is flexibly and sealingly arranged between the sealing part 31 and the valve port 14 when the sealing part 31 closes the valve port 14, which avoids the rigid contact between the valve port 14 and the sealing part 31, thereby avoiding the deformation of the valve port 14 due to the extrusion of the sealing part 31, and ensuring the cutoff function of the pressure relief valve 100 in the closed state; meanwhile, the arrangement of the first O-shaped sealing ring 4 improves the reliability of the sealing part 31 in closing the valve port 14, and the first O-shaped sealing ring 4 deforms when being extruded, thereby better sealing the valve port 14.
[0041] As another preferred scheme of the utility model, the valve body 1 is provided with the end cover 15 for sealing the valve cavity 11, and the second O-shaped sealing ring 5 is arranged between the end cover 15 and the valve body 1. The end cover 15 is provided with a containing groove 153 matched with the outer peripheral dimension of the spring 2. The side of the sealing part 31 facing the spring 2 is provided with an annular groove 35 for positioning the end part of the spring 2. In the embodiment, as shown in Figure 2 and Figure 5As shown, the end cover 15 is arranged to facilitate the installation and later maintenance of the internal components of the valve body 1, and the second O-ring 5 is arranged to improve the air tightness between the end cover 15 and the valve body 1. The side of the blocking part 31 facing the spring 2 is provided with an annular groove 35 for positioning the end of the spring 2, and the end cover 15 is provided with a receiving groove 153 matching the outer circumferential dimension of the spring 2, the first end of the spring 2 is sleeved in the receiving groove 153, and the second end of the spring 2 abuts against the annular groove 35, so that the spring 2 is quickly positioned during installation, and dislocation of the spring 2 during movement of the valve core 3 is prevented.
[0042] Obviously, the above embodiments are only examples for clearly illustrating the present application, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments cannot be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.
Claims
1. A pressure relief valve for a compressor, comprising a valve body (1), characterized in that: The valve body (1) is provided with a valve cavity (11). The valve body (1) is provided with an air inlet (12) and an exhaust port (13) respectively communicating with the valve cavity (11). The air inlet (12) is connected to the oil separator (300) of the compressor (200). The exhaust port (13) is connected to the atmosphere. A valve port (14) is provided between the air inlet (12) and the exhaust port (13). A valve corresponding to the valve port (14) is movably arranged in the valve cavity (11). The valve core (3) and the spring (2) corresponding to the valve core (3) are arranged in abutting against each other so that the valve core (3) always has the tendency to close the valve port (14); when the pressure in the oil separator (300) exceeds the set value, compressed gas enters the valve chamber (11) through the air inlet (12), so that the valve core (3) overcomes the elastic force of the spring (2) and moves away from the valve port (14) to open the valve port (14).
2. The pressure relief valve for a compressor according to claim 1, characterized in that: The valve core (3) has a sealing part (31) that corresponds to and cooperates with the valve port (14), and the spring (2) abuts against the sealing part (31).
3. The pressure relief valve for a compressor according to claim 2, characterized in that: A first O-ring (4) is provided between the sealing part (31) and the valve port (14).
4. The pressure relief valve for a compressor according to claim 2, characterized in that: The valve body (1) is provided with an end cap (15) for sealing the valve cavity (11), and a second O-ring (5) is provided between the end cap (15) and the valve body (1).
5. The pressure relief valve for a compressor according to claim 4, characterized in that: The valve core (3) has a first sleeve portion (32), and the end cap (15) is provided with a second sleeve portion (151) that is movably sleeved with the first sleeve portion (32). The first sleeve portion (32) and the second sleeve portion (151) cooperate to form an inner cavity (321), and the spring (2) is sleeved on the outer periphery of the first sleeve portion (32) and the second sleeve portion (151).
6. A pressure relief valve for a compressor according to claim 5, characterized in that: The valve core (3) is provided with a first breathing hole (33) for connecting the inner cavity (321) and the valve cavity (11), and the end cap (15) is provided with a second breathing hole (152) for connecting the inner cavity (321) and the valve cavity (11).
7. The pressure relief valve for a compressor according to claim 4, characterized in that: The end cap (15) is provided with a receiving groove (153) that matches the outer circumferential dimensions of the spring (2).
8. A pressure relief valve for a compressor according to claim 5, characterized in that: The first sleeve part (32) and the sealing part (31) are detachably fixedly connected by bolts (34), and a third O-ring (6) is provided between the first sleeve part (32) and the sealing part (31).
9. A pressure relief valve for a compressor according to claim 3, characterized in that: The sealing part (31) includes a first sealing block (311) and a second sealing block (312), wherein the first sealing block (311) and the second sealing block (312) cooperate to form an installation groove (313) for installing the first O-ring (4).
10. A pressure relief valve for a compressor according to claim 2, characterized in that: The sealing part (31) has an annular groove (35) on the side facing the spring (2) for positioning the end of the spring (2).