Safety valve for twin screw pump

Abstract

The utility model discloses a safety valve for double screw pump, including lower casing and upper casing, the lower casing with upper casing is fixed through bolt, the inboard of lower casing is installed with liquid inlet pipe, the inboard of lower casing is installed with the valve clack for closing liquid inlet pipe, two vertical rods are installed to the valve clack bottom surface, the outer side of two vertical rods is slidably installed with the guard board, the inside of guard board is equipped with the mounting hole, the vertical rod surface is equipped with the limit slot, the both sides of guard board all are equipped with the limit link that passes through the limit slot, the side of limit link is provided with the inclined plane, the side of limit link is provided with the elastic component that is connected with the mounting hole inner wall, the one side fixed mounting of guard board has the mounting rod. The utility model discloses when pressure relief, the impact of medium is received to the guard board, and then prevents medium and directly impacts to the valve clack, has promoted the service life of safety valve, when medium is discharged, movable filter screen can filter medium to prevent the impurity in medium and enters safety valve.

Description

Technical Field

[0001] This utility model relates to the field of safety valve technology, specifically a safety valve for a twin-screw pump. Background Technology

[0002] In industrial production, twin-screw pumps are widely used in various fluid transportation applications due to their unique structure and high efficiency. During the operation of a twin-screw pump, when the pressure of the medium inside the pump exceeds a certain limit, a safety valve needs to be installed to release pressure in order to ensure the safe operation of the equipment.

[0003] Traditional safety valves for twin-screw pumps often present several problems during media depressurization. Firstly, the direct impact of the medium on the valve disc can easily damage it, affecting the valve's lifespan. Secondly, impurities in the medium can easily enter the valve, causing wear on the valve disc and seals, reducing its sealing performance. While some improved safety valves exist, modifying their internal structure to allow the medium to pass through a filter before depressurization to reduce wear on the valve disc and seals, these filters are prone to clogging and require frequent cleaning or replacement, causing inconvenience. Therefore, we propose a new safety valve for twin-screw pumps. Utility Model Content

[0004] The purpose of this invention is to provide a safety valve for a twin-screw pump to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a safety valve for a twin-screw pump, comprising a lower housing and an upper housing, wherein the lower housing and the upper housing are fixed together by bolts, an inlet pipe is installed inside the lower housing, and a valve disc for sealing the inlet pipe is installed inside the lower housing;

[0006] Two vertical rods are mounted on the bottom surface of the valve disc. A protective plate is slidably mounted on the outer side of the two vertical rods. The protective plate has an installation hole inside. A limit groove is opened on the surface of the vertical rod. Limiting rods that pass through the limit grooves are installed through both sides of the protective plate. A bevel is provided on one side of the limiting rod. An elastic component that connects to the inner wall of the installation hole is provided on one side of the limiting rod. An installation rod is fixedly mounted on one side of the protective plate. A movable filter screen is slidably mounted on the outer side of the installation rod. An elastic component is provided between the movable filter screen and the protective plate. A threaded component for abutting the bevel of the limiting rod is provided inside the installation rod.

[0007] Preferably, the width of the limiting groove matches the width of the limiting rod.

[0008] Preferably, the elastic component includes a mounting block, which is fixedly mounted on one side of the limiting rod, and a first spring is connected between the mounting block and the inner wall of the mounting hole.

[0009] Preferably, the elastic element is a second spring, one end of which is fixedly installed on one side of the movable filter screen, and the other end of the movable filter screen is fixedly installed on one side of the protective plate.

[0010] Preferably, the threaded assembly includes a threaded rod that is threaded through the mounting rod and the protective plate, and an abutting circular plate is fixedly installed at one end of the threaded rod. The abutting circular plate is used to abut against the inclined surface of the limiting rod.

[0011] Preferably, a knob is fixedly installed at one end of the threaded rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The safety valve of this twin-screw pump causes the medium in the inlet pipe to move upward during pressure relief, thereby discharging the medium and relieving pressure. The protective plate is impacted by the medium, thus preventing the medium from directly impacting the valve disc and extending the service life of the safety valve. When the medium is discharged, the movable filter screen can filter the medium, thereby preventing impurities in the medium from entering the safety valve.

[0014] 2. The safety valve of this twin-screw pump rotates the screw rod by turning the knob, causing the contact plate to move downward. Under the action of the first spring, the inclined surface of the limiting rod can contact the outer side of the contact plate, thereby causing the two limiting rods to move closer to each other until the limiting rods are completely disengaged from the limiting groove. Then the protective plate can be removed from the outside of the vertical rod, and the protective plate, mounting rod, and movable filter screen can be removed from the inlet pipe for maintenance. The maintenance operation is convenient. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is an enlarged structural schematic diagram of the present invention.

[0018] In the diagram: 1. Lower housing; 2. Upper housing; 3. Valve disc; 4. Inlet pipe; 5. Vertical rod; 6. Protective plate; 7. Mounting hole; 8. Limiting rod; 9. Limiting groove; 10. Mounting block; 11. First spring; 12. Mounting rod; 13. Second spring; 14. Movable filter screen; 15. Threaded rod; 16. Knob; 17. Contact plate. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1

[0021] Please refer to Figure 1-3 As shown, this utility model provides a safety valve for a twin-screw pump, including a lower housing 1 and an upper housing 2. The lower housing 1 and the upper housing 2 are fixed together by bolts. An inlet pipe 4 is installed inside the lower housing 1, and a valve disc 3 for sealing the inlet pipe 4 is installed inside the lower housing 1.

[0022] Two vertical rods 5 are mounted on the bottom surface of the valve disc 3. A protective plate 6 is slidably mounted on the outside of the two vertical rods 5. The protective plate 6 has an installation hole 7 inside. A limit groove 9 is opened on the surface of the vertical rod 5. The width of the limit groove 9 matches the width of the limit rod 8. Limit rods 8 are installed through the limit grooves 9 on both sides of the protective plate 6. A slope is provided on one side of the limit rod 8. An elastic component connected to the inner wall of the installation hole 7 is provided on one side of the limit rod 8. An installation rod 12 is fixedly installed on one side of the protective plate 6. A movable filter screen 14 is slidably mounted on the outside of the installation rod 12. An elastic component is provided between the movable filter screen 14 and the protective plate 6. A threaded component for abutting the slope of the limit rod 8 is provided inside the installation rod 12.

[0023] Specifically, during pressure relief, the protective plate 6 is impacted by the medium, thereby preventing the medium from directly impacting the valve disc 3 and extending the service life of the safety valve. When the medium is discharged, the movable filter screen 14 can filter the medium, thereby preventing impurities in the medium from entering the safety valve.

[0024] The elastic component includes a mounting block 10, which is fixedly installed on one side of the limiting rod 8. A first spring 11 is connected between the mounting block 10 and the inner wall of the mounting hole 7. Under the action of the first spring 11, the mounting block 10 and the limiting rod 8 can be easily pulled to reset.

[0025] Specifically, the elastic element is the second spring 13. One end of the second spring 13 is fixedly installed on one side of the movable filter screen 14, and the other end of the movable filter screen 14 is fixedly installed on one side of the protective plate 6. The movable filter screen 14 can alleviate the impact effect of a certain medium discharge.

[0026] The threaded assembly includes a threaded rod 15, which is threaded through the mounting rod 12 and the protective plate 6. A contact plate 17 is fixedly installed at one end of the threaded rod 15. The contact plate 17 is used to abut against the inclined surface of the limiting rod 8. A knob 16 is fixedly installed at one end of the threaded rod 15. By rotating the knob 16, the threaded rod 15 is rotated, causing the contact plate 17 to move. When the contact plate 17 moves upward, it can push open the two limiting rods 8, causing the two limiting rods 8 to move away from each other. When the contact plate 17 moves downward, the elastic component can pull the two limiting rods 8 to move closer to each other.

[0027] Working principle: This utility model is a safety valve for a twin-screw pump. When depressurizing, the medium in the inlet pipe 4 moves upward and pressurizes the valve disc 3 to move upward, thereby discharging the medium and performing depressurization. The protective plate 6 is impacted by the medium, thus preventing the medium from directly impacting the valve disc 3 and improving the service life of the safety valve. When the medium is discharged, the movable filter screen 14 can filter the medium, thereby preventing impurities in the medium from entering the safety valve.

[0028] When maintenance is required, the screw rod 15 is rotated by turning the knob 16, causing the contact plate 17 to move downward. Under the action of the first spring 11, the inclined surface of the limiting rod 8 can contact the outer side of the contact plate 17, thereby causing the two limiting rods 8 to move towards each other until the limiting rods 8 are completely disengaged from the limiting groove 9. Then the protective plate 6 can be removed from the outside of the vertical rod 5, and the protective plate 6, the mounting rod 12, and the movable filter screen 14 can be taken out of the liquid inlet pipe 4 for maintenance. The maintenance operation is convenient.

[0029] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A safety valve for a twin-screw pump, comprising a lower housing (1) and an upper housing (2), characterized in that: The lower housing (1) and the upper housing (2) are fixed together by bolts. An inlet pipe (4) is installed inside the lower housing (1), and a valve disc (3) for sealing the inlet pipe (4) is installed inside the lower housing (1). Two vertical rods (5) are installed on the bottom surface of the valve disc (3). A protective plate (6) is slidably installed on the outside of the two vertical rods (5). An installation hole (7) is opened inside the protective plate (6). A limiting groove (9) is opened on the surface of the vertical rod (5). A limiting rod (8) is installed through both sides of the protective plate (6) and passes through the limiting groove (9). A slope is provided on one side of the limiting rod (8). An elastic component connected to the inner wall of the installation hole (7) is provided on one side of the limiting rod (8). An installation rod (12) is fixedly installed on one side of the protective plate (6). A movable filter screen (14) is slidably installed on the outside of the installation rod (12). An elastic element is provided between the movable filter screen (14) and the protective plate (6). A threaded component for abutting the slope of the limiting rod (8) is provided inside the installation rod (12).

2. The safety valve for a twin-screw pump according to claim 1, characterized in that: The width of the limiting groove (9) matches the width of the limiting rod (8).

3. The safety valve for a twin-screw pump according to claim 1, characterized in that: The elastic component includes a mounting block (10), which is fixedly mounted on one side of the limiting rod (8), and a first spring (11) is connected between the mounting block (10) and the inner wall of the mounting hole (7).

4. A safety valve for a twin-screw pump according to claim 1, characterized in that: The elastic element is specifically a second spring (13), one end of which is fixedly installed on one side of the movable filter (14), and the other end of which is fixedly installed on one side of the protective plate (6).

5. A safety valve for a twin-screw pump according to claim 1, characterized in that: The threaded assembly includes a threaded rod (15), which is threaded through the mounting rod (12) and the protective plate (6). One end of the threaded rod (15) is fixedly mounted with an abutting circular plate (17), which is used to abut the inclined surface of the limiting rod (8).

6. A safety valve for a twin-screw pump according to claim 5, characterized in that: A knob (16) is fixedly installed at one end of the threaded rod (15).

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