Safety valve special for oil refining

Abstract

The utility model relates to the technical field of safety valves, in particular to a special safety valve for oil refining, which comprises a valve body, an air inlet hole and a containing cavity are sequentially arranged in the middle of the bottom end of the valve body from bottom to top, air outlet holes are arranged on the left side and the right side of the containing cavity of the valve body, a valve rod is arranged in the containing cavity of the valve body, and a valve core is fixed at the bottom end of the valve rod. The filtering mechanism comprises a movable plate inserted into the bottom end of the valve body in a sliding mode, a filtering hole corresponding to the air inlet hole in position and matched with the air inlet hole in size is formed in the movable plate, a filtering net is installed at the filtering hole of the movable plate, inserting blocks are connected into the left side and the right side of the movable plate in a sliding mode, and fixing is completed after the inserting blocks on the two sides are inserted into the inserting holes in the valve body on the same side. The filter screen can effectively intercept impurities of the air inlet hole in the oil refining process and prevent the impurities from entering the valve body to affect normal work of components such as the valve element, replacement is convenient, the adjusting rod can be firmly clamped through the fixing mechanism, displacement of the adjusting rod is effectively prevented, and safe and stable operation of the device is maintained.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of safety valve, concretely relates to a special safety valve for oil refining. BACKGROUND

[0002] In the oil refining process, various complex working conditions are generated, involving high temperature, high pressure and gas or liquid medium containing impurities; the traditional safety valve often has some deficiencies in such environment; for example, the adjusting rod of the safety valve is prone to displacement in the complex environment such as vibration in the oil refining site, resulting in changes in the pre-set pressure parameters and affecting the safe and stable operation of the entire device.

[0003] The utility model discloses a safety valve in the publication No. CN221525716U, which comprises: a valve body with an air inlet channel and an air outlet channel that can be connected in sequence; a movable valve core for blocking the connection between the air inlet channel and the air outlet channel; a valve stem connected to the valve core at the lower end and slidingly connected to the valve body at the upper end; a spring arranged in the valve body, with the lower end directly or indirectly contacting the upper end of the valve stem; an adjusting rod screw-connected to the upper end of the valve body, with the lower end directly or indirectly contacting the upper end of the spring; a vertical rod connected to the upper end of the adjusting rod at the upper end and slidingly connected to the valve body at the lower end; the vertical rod can rotate synchronously with the adjusting rod; a rotation limiting mechanism for limiting the rotation of the vertical rod relative to the valve body.

[0004] Although the utility model can prevent accidental touch of the handle or adjusting rod by the setting of the vertical rod and rotation limiting mechanism, impurities generated in the oil refining process can easily enter the safety valve along with the medium, which may block the channel between the valve core and valve seat, affecting the normal opening and closing functions of the safety valve and reducing its reliability and safety. TECHNICAL FIELD

[0005] The utility model aims to provide a special safety valve for oil refining to solve the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The utility model provides a special safety valve for oil refining, including valve body, the bottom middle part of valve body is opened with air inlet hole and accommodating cavity from bottom to top in turn, the left and right sides of accommodating cavity are all opened with air outlet, air inlet hole, air outlet and two air outlets are communicated with each other, the valve rod is equipped in accommodating cavity of valve body, the bottom fixed with valve core of valve rod, the top fixed with lifting plate of valve rod, the adjusting cavity for accommodating lifting plate is opened in valve body, the threaded sleeve is fixed at the top of adjusting cavity of valve body, the adjusting rod is connected with threaded sleeve in threaded, the adjusting plate is rotatably connected after adjusting rod bottom end extends to adjusting cavity, reset spring is installed between lifting plate and adjusting plate, still include:

[0008] The filter mechanism for filtering the air inlet hole, the filter mechanism includes the movable plate of sliding plug-in the bottom end of the valve body, the filter hole is opened on the movable plate, and the size is matched with the position of the air inlet hole, the filter screen is installed on the filter hole of the movable plate, the plug-in block is slidably connected in the left and right sides of the movable plate, and the plug-in block is inserted into the insertion hole in the same side of the valve body to complete the fixation.

[0009] The fixing mechanism for clamping and fixing the adjusting rod, the fixing mechanism is installed at the top of the valve body.

[0010] As preferred, the top of the adjusting rod extends to the outside of the valve body, and the handle is fixed at the top of the adjusting rod.

[0011] As preferred, the end of the front side of the plug-in block close to the filter screen is fixed with the sliding block, the lead screw is rotatably connected in the left and right sides of the movable plate, and the lead screw is threadedly connected with the sliding block on the same side.

[0012] As preferred, the end of the lead screw away from the filter screen is fixed with the anti-skid block after extending to the outside of the movable plate, and the surface of the anti-skid block is roughened.

[0013] As preferred, the fixing mechanism includes two fixed blocks fixed at the left and right ends of the top surface of the valve body respectively, two fixed columns are fixed between the two fixed blocks, and the adjusting rod is located between the two fixed columns.

[0014] As preferred, two clamping plates are slidably connected on the two fixed columns, and the adjusting rod is located between the two clamping plates.

[0015] As preferred, the opposite surfaces of the two clamping plates are all adhered with the anti-skid pads, and the material of the anti-skid pads is rubber.

[0016] As preferred, two clamping springs are installed between the clamping plates and the fixed blocks on the same side, and the clamping spring is sleeved outside the fixed column on the same side.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This utility model incorporates a filtration mechanism. The filter screen on its movable plate can effectively intercept impurities from the air inlet during the oil refining process, preventing impurities from entering the valve body and affecting the normal operation of components such as the valve core. This ensures the stability of the safety valve, extends the service life of the equipment, and facilitates replacement. Furthermore, the fixing mechanism can firmly clamp the adjusting rod, effectively preventing displacement of the adjusting rod and ensuring that the preset pressure parameters remain stable. This maintains the safe and stable operation of the device and reduces safety hazards caused by loose adjusting rods. Attached Figure Description

[0019] Fig. 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Fig. 2 This is a schematic diagram of the structure in the utility model;

[0021] Fig. 3 This is a schematic diagram of the structure in the utility model;

[0022] In the picture:

[0023] 1. Valve body; 10. Air inlet; 11. Air outlet; 12. Receiving cavity; 13. Adjusting cavity; 14. Threaded sleeve;

[0024] 2. Valve stem; 20. Valve core; 21. Lifting plate;

[0025] 3. Return spring;

[0026] 4. Adjusting rod; 40. Adjusting plate; 41. Handle;

[0027] 5. Filtering mechanism; 50. Movable plate; 51. Filter screen; 52. Insert block; 53. Sliding block; 54. Lead screw; 55. Anti-slip block;

[0028] 6. Fixing mechanism; 60. Fixing block; 61. Fixing column; 62. Clamping plate; 63. Clamping spring; 64. Anti-slip pad. Detailed Implementation

[0029] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] Please see Figs. 1-3 The present invention provides the following technical solution:

[0031] A safety valve for oil refining includes a valve body 1. An air inlet 10 and a receiving cavity 12 are sequentially formed from bottom to top at the bottom center of the valve body 1. Air outlets 11 are formed on both sides of the receiving cavity 12. The air inlet 10, air outlets 11, and the two air outlets 11 are interconnected. When the pressure exceeds a preset pressure parameter, the valve core 20 rises, completing the pressure relief operation through the air inlet 10, the receiving cavity 12, and the air outlets 11. A valve stem 2 is provided within the receiving cavity 12 of the valve body 1. The valve core 20 is fixed to the bottom end of the valve stem 2, and the top end of the valve stem 2 is fixed... The valve body 1 has a lifting plate 21 and an adjusting cavity 13 for accommodating the lifting plate 21. A threaded sleeve 14 is fixed to the top of the adjusting cavity 13. An adjusting rod 4 is threadedly connected to the threaded sleeve 14. The bottom end of the adjusting rod 4 extends into the adjusting cavity 13 and is rotatably connected to an adjusting plate 40. The adjusting cavity 13 limits the adjusting plate 40 by its shape, preventing the adjusting plate 40 from rotating with the adjusting rod 4. A return spring 3 is installed between the lifting plate 21 and the adjusting plate 40. The preset pressure parameter is changed by rotating the adjusting rod 4. The valve body 1 also includes:

[0032] The filter mechanism 5 is used to filter the air inlet 10. The filter mechanism 5 includes a movable plate 50 that is slidably inserted into the bottom end of the valve body 1. The movable plate 50 has filter holes that correspond to the position of the air inlet 10 and are adapted to the size. A filter screen 51 is installed on the movable plate 50 at the filter holes. Insert blocks 52 are slidably connected to both sides of the movable plate 50. After the insert blocks 52 on both sides are inserted into the insert holes in the valve body 1 on the same side, they are fixed and easy to replace.

[0033] The fixing mechanism 6 is used to clamp and fix the adjusting rod 4. The fixing mechanism 6 is installed on the top of the valve body 1.

[0034] In this embodiment, the top end of the adjusting rod 4 extends outside the valve body 1, and a handle 41 is fixed to the top end of the adjusting rod 4, so that the user can rotate the adjusting rod 4 to change the preset pressure parameters.

[0035] Specifically, a slider 53 is fixed to one end of the front side of the insert 52 near the filter screen 51. A lead screw 54 is rotatably connected to both sides of the movable plate 50. The lead screw 54 is threadedly connected to the slider 53 on the same side. Rotating the lead screw 54 can change the position of the insert 52.

[0036] Specifically, the end of the lead screw 54 away from the filter screen 51 extends to the outside of the movable plate 50 and is fixed with an anti-slip block 55. The surface of the anti-slip block 55 is roughened to facilitate the user to rotate the lead screw 54.

[0037] Furthermore, the fixing mechanism 6 includes two fixing blocks 60 that fix the left and right ends of the top surface of the valve body 1 respectively, and two fixing posts 61 that are fixed between the two fixing blocks 60. The adjusting rod 4 is located between the two fixing posts 61, that is, the two fixing posts 61 are one in front of the other.

[0038] In addition, two clamping plates 62 are slidably connected to the two fixed columns 61, and the adjusting rod 4 is located between the two clamping plates 62, that is, the two clamping plates 62 are on the left and right respectively.

[0039] It is worth noting that anti-slip pads 64 are adhered to the opposite surfaces of the two clamping plates 62. The anti-slip pads 64 are made of rubber. When the two clamping plates 62 clamp the adjusting rod 4, the anti-slip pads 64 can play a very good anti-slip role.

[0040] It is worth noting that two clamping springs 63 are installed between the clamping plate 62 and the fixing block 60 on the same side. The clamping springs 63 are sleeved on the outside of the fixing post 61 on the same side. The clamping springs 63 will bring the two clamping plates 62 closer to each other and fix the adjusting rod 4.

[0041] When the refining-specific safety valve of this utility model is in use, during the refining process, when the system pressure is within the normal working pressure range set by the valve body 1, the elastic force of the return spring 3 acts on the lifting plate 21 and the adjusting plate 40, keeping the valve stem 2 in a certain position. Consequently, the valve core 20 is tightly fitted onto the air inlet 10, blocking the passage between the air inlet 10 and the air outlet 11. At this time, the medium cannot be discharged through the valve body 1, and the system operates normally. The adjusting rod 4 is threadedly connected to the threaded sleeve 14, and the preset pressure parameter can be changed by turning the handle 41. The clamping plate 62 of the fixing mechanism 6 tightly clamps the adjusting plate 40 under the action of the clamping spring 63, preventing it from being displaced due to factors such as vibration at the refining site. This ensures that the elastic force of the return spring 3 is stable, ensuring that the opening pressure of the valve body 1 is always maintained at the set value, and ensuring the safe and stable operation of the system.

[0042] When the pressure rises above the set pressure parameter of valve body 1, the force of the medium pressure acting on the bottom of valve core 20 is greater than the elastic force of return spring 3. At this time, valve core 20 moves upward under the action of pressure difference, and valve stem 2 rises accordingly, so that air inlet 10 and air outlet 11 are connected. The medium is discharged through air outlet 11, thereby reducing the system pressure and playing the role of overpressure protection. When the system pressure returns to the normal range, under the action of return spring 3, valve core 20 and valve stem 2 return to the initial position, blocking the passage between air inlet 10 and air outlet 11 again.

[0043] Before the medium enters the valve body 1 through the air inlet 10, it first passes through the filter screen 51 of the filter mechanism 5. The filter screen 51 can intercept impurity particles generated during the oil refining process and prevent them from entering the interior of the valve body 1. The movable plate 50 is fixed to the valve body 1 by the insert block 52. The insert block 52 can slide inside the movable plate 50. By rotating the screw 54, the threaded connection between the screw 54 and the slider 53 can cause the slider 53 to drive the insert block 52 to be inserted into or pulled out of the insertion hole of the valve body 1, realizing the installation and disassembly of the movable plate 50. This facilitates the regular cleaning or replacement of the filter screen 51, ensuring the filtration effect, effectively protecting the internal components of the valve body 1 from impurities, maintaining the normal working performance of the valve body 1, and extending the service life of the equipment.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A safety valve for oil refining, comprising a valve body (1), characterized in that, The valve body (1) has an air inlet (10) and a receiving cavity (12) sequentially arranged from bottom to top at the middle of its bottom end. The valve body (1) has air outlets (11) on both the left and right sides of the receiving cavity (12). The air inlet (10), the air outlets (11), and the two air outlets (11) are interconnected. The valve body (1) has a valve stem (2) inside the receiving cavity (12). A valve core (20) is fixed at the bottom end of the valve stem (2), and a lifting mechanism is fixed at the top end of the valve stem (2). The valve body (1) has an adjustment cavity (13) for accommodating the lifting plate (21). A threaded sleeve (14) is fixed at the top of the adjustment cavity (13) of the valve body (1). An adjustment rod (4) is threadedly connected inside the threaded sleeve (14). The bottom end of the adjustment rod (4) extends into the adjustment cavity (13) and is rotatably connected to an adjustment plate (40). A return spring (3) is installed between the lifting plate (21) and the adjustment plate (40). The valve body (1) also includes: A filter mechanism (5) for filtering the air inlet (10) includes a movable plate (50) slidably inserted into the bottom of the valve body (1). The movable plate (50) has filter holes that correspond to the position of the air inlet (10) and are adapted to the size. A filter screen (51) is installed at the filter holes on the movable plate (50). Insert blocks (52) are slidably connected to both sides of the movable plate (50). The insert blocks (52) on both sides are inserted into the insert holes in the valve body (1) on the same side to complete the fixation. A fixing mechanism (6) for clamping and fixing the adjusting rod (4) is installed on the top of the valve body (1).

2. The oil refining-specific safety valve according to claim 1, characterized in that: The top end of the adjusting rod (4) extends outside the valve body (1), and a handle (41) is fixed to the top end of the adjusting rod (4).

3. The refining-specific safety valve according to claim 1, characterized in that: A slider (53) is fixed to one end of the front side of the insert (52) near the filter screen (51). A lead screw (54) is rotatably connected to both the left and right sides of the movable plate (50). The lead screw (54) is threadedly connected to the slider (53) on the same side.

4. The oil refining-specific safety valve according to claim 3, characterized in that: The end of the lead screw (54) away from the filter screen (51) extends to the outside of the movable plate (50) and is fixed with an anti-slip block (55), the surface of which is roughened.

5. The refining-specific safety valve according to claim 1, characterized in that: The fixing mechanism (6) includes two fixing blocks (60) that fix the left and right ends of the top surface of the valve body (1) respectively, and two fixing columns (61) are fixed between the two fixing blocks (60). The adjusting rod (4) is located between the two fixing columns (61).

6. The refining-specific safety valve according to claim 5, characterized in that: Two clamping plates (62) are slidably connected to the two fixed columns (61), and the adjusting rod (4) is located between the two clamping plates (62).

7. The oil refining safety valve according to claim 6, characterized in that: Anti-slip pads (64) are adhered to the opposite surfaces of the two clamps (62), and the anti-slip pads (64) are made of rubber.

8. The refining-specific safety valve according to claim 6, characterized in that: Two clamping springs (63) are installed between the clamping plate (62) and the fixing block (60) on the same side, and the clamping springs (63) are sleeved on the outside of the fixing post (61) on the same side.

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