A differential pressure switch

Abstract

The application relates to the technical field of differential pressure switches, in particular to a differential pressure switch which comprises a switch main body, an adjusting shell and an adjusting cavity are arranged on the switch main body, the switch main body is provided with a communicating end, the adjusting cavity is provided with a rotatable L-shaped communicating pipe, the top of the communicating pipe penetrates through the adjusting shell, and a free end of the communicating pipe is detachably connected with a connecting pipe. A dismounting mechanism is arranged between the connecting pipe and the communicating pipe, and a limiting mechanism is arranged in the adjusting cavity. The dismounting mechanism is realized through a joint base, a sliding outer sleeve and the like to realize quick dismounting, and the limiting mechanism accurately limits the rotating angle of the communicating pipe through a fixing ring, a fixing sleeve and the like. The application solves the problems of inconvenient pipeline connection and inaccurate angle adjustment of the existing differential pressure switch, and improves the practicability and applicability of the differential pressure switch.

Description

Technical Field

[0001] This application relates to the field of differential pressure switch technology, and in particular to a differential pressure switch. Background Technology

[0002] Differential pressure switches play a crucial role in many devices used in industrial production and daily life. They are used to detect the pressure difference between two pressure sources and control the on / off state of the circuit based on the set pressure difference value, thereby achieving automated control or safety protection of the equipment.

[0003] However, existing differential pressure switches have revealed significant shortcomings in practical applications. On the one hand, their structural design makes disassembly and assembly extremely cumbersome during pipeline connection and installation. Traditional connection methods mostly involve fixed welding or complex bolt tightening. When facing pipeline maintenance, fault repair, or pipeline replacement due to changes in operating conditions, operators need to use various tools and spend a lot of time and effort on disassembly and reinstallation, which greatly reduces maintenance efficiency and increases maintenance costs and equipment downtime.

[0004] On the other hand, existing differential pressure switches have serious shortcomings in terms of installation angle adjustment. Their internal structure limits the flexible adjustment of the connecting pipe's rotation angle, making it impossible to accurately position them at the required angle. In some special operating conditions with strict requirements on the direction and angle of pressure detection, existing differential pressure switches are unable to meet the needs, resulting in inaccurate pressure detection and affecting the overall performance and operational stability of the equipment.

[0005] Therefore, a differential pressure switch was invented to solve the problems mentioned in the background art. Utility Model Content

[0006] The purpose of this utility model is to provide a differential pressure switch that solves the problems of cumbersome disassembly and assembly of existing differential pressure switches during pipeline connection, as well as the difficulty in flexibly and accurately adjusting the installation angle.

[0007] This application provides a differential pressure switch, which adopts the following technical solution: it includes a switch body, wherein the switch body is provided with an adjustment housing, and the adjustment housing has an adjustment cavity; the switch body has two connecting ends, and the adjustment cavity is provided with two connecting pipes, which can rotate relative to the connecting ends. The connecting pipes have an L-shaped structure, and the top of the connecting pipes penetrates through the adjustment housing. The free end of the connecting pipe is detachably connected to a connecting pipe. The adjustment cavity is provided with a limiting mechanism that can limit the rotation angle of the connecting pipes, and a disassembly mechanism is provided between the connecting pipe and the connecting pipe.

[0008] Optionally, the disassembly mechanism includes a connector base, which is fixedly connected to the connecting pipe. A slidable sliding sleeve is provided on the outer side of the connector base. A connecting spring is connected to the connector base, and the other end of the connecting spring is connected to the sliding sleeve. The connector base has several spherical grooves, and a limiting ball is movably connected in each spherical groove. An annular limiting groove is provided on the periphery of the connecting pipe. The connecting pipe can be inserted into the connector base, and the limiting ball can be inserted into the limiting groove. The sliding sleeve is provided with a pushing protrusion that can push the limiting ball into the limiting groove.

[0009] Optionally, the limiting mechanism includes a fixing ring, which is fixedly connected inside the adjusting housing, and the inner side of the fixing ring is provided with a plurality of limiting teeth.

[0010] Optionally, a fixing rod is provided on the connecting pipe, a fixing spring is provided on the fixing rod, a fixing sleeve is slidably connected to the fixing rod, and the other end of the fixing spring is fixedly connected to the fixing sleeve; a limiting groove is formed between two adjacent limiting teeth, and a retaining tooth that can be inserted into the limiting groove is provided at the end of the fixing sleeve near the fixing ring.

[0011] In summary, this application includes the following beneficial technical effects: 1. Convenient and efficient pipe connection: The disassembly mechanism abandons the traditional fixed welding or complex bolt fastening method. It adopts a clever combination of joint base, sliding sleeve, connecting spring, limit ball and limit slot to realize the quick connection and separation of connecting pipe and connecting pipe. When maintaining, repairing or replacing pipes, no need to use a variety of tools. Operators can simply operate the sliding sleeve to complete the task, which greatly shortens the maintenance time, reduces the maintenance cost and reduces equipment downtime. 2. Precisely Adjustable Installation Angle: The limit mechanism utilizes a structure including a fixed ring, limit teeth, fixed rod, fixed spring, fixed sleeve, and locking teeth to overcome the limitations imposed by existing differential pressure switches on the rotation angle of the connecting pipe. Users can precisely adjust the rotation angle of the connecting pipe according to actual working conditions, ensuring accurate pressure detection in various complex environments and improving the overall performance and operational stability of the equipment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the device; Figure 2 This is the front view of the device; Figure 3 This is a cross-sectional schematic diagram of the overall structure of this device; Figure 4 This is a schematic diagram of the interior of the adjustment chamber of this device; Figure 5 For this device Figure 3 Enlarged view of A in the middle; The components are as follows: 1. Switch body; 2. Adjustment housing; 3. Adjustment cavity; 4. Connecting end; 5. Connecting pipe; 6. Connecting pipe; 7. Limiting mechanism; 8. Disassembly mechanism; 9. Connector base; 10. Sliding outer sleeve; 11. Connecting spring; 12. Spherical groove; 13. Limiting ball; 14. Limiting slot; 15. Pushing protrusion; 16. Fixing ring; 17. Limiting tooth; 18. Fixing rod; 19. Fixing compression spring; 20. Fixing sleeve; 21. Limiting groove; 22. Locking tooth. Detailed Implementation

[0013] The present application will be further described in detail below with reference to the accompanying drawings. In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present utility model.

[0014] Reference Figure 1 , Figure 3 , Figure 4 One embodiment shown is as follows: The differential pressure switch is composed of a switch body 1, an adjusting housing 2, a connecting pipe 5, a connecting pipe 6, etc. In this embodiment, the adjusting housing 2 is fixedly connected to the switch body 1. The adjusting cavity 3 inside the adjusting housing 2 provides installation space for components such as the connecting pipe 5. The connecting pipe 5 is set in the adjusting cavity 3, and one end of it is connected to the connecting end 4 on the switch body 1 through a rotating connection structure, so that the connecting pipe 5 can rotate flexibly relative to the connecting end 4. This rotating connection relationship facilitates the adjustment of the angle of the connecting pipe 5 to adapt to different pressure detection requirements. The connecting pipe 5 is L-shaped, and the top penetrates through the adjusting housing 2, which facilitates connection with external components. Its free end is connected to the connecting pipe 6 through a disassembly mechanism 8. The limiting mechanism 7 is set in the adjusting cavity 3 to limit the rotation angle of the connecting pipe 5.

[0015] The implementation principle of the above embodiment is as follows: When it is necessary to adjust the detection angle of the differential pressure switch, the connecting pipe 5 can be rotated. The connecting pipe 5 rotates around the rotation connection point with the connecting end 4. After adjusting to a suitable angle, it is fixed by the limiting mechanism 7. When it is necessary to replace the connecting pipe 6, the connecting pipe 6 is removed from the connecting pipe 5 by the disassembly mechanism 8. After the replacement is completed, it is reconnected by the disassembly mechanism 8.

[0016] Reference Figure 2 , Figure 3 , Figure 5One embodiment shown is as follows: The disassembly mechanism 8 consists of a connector base 9, a sliding sleeve 10, a connecting spring 11, and a limiting ball 13. In this embodiment, the connector base 9 is fixedly connected to the free end of the connecting pipe 5. The two can be connected by welding or thread to ensure the stability of the connection. The sliding sleeve 10 is sleeved on the outside of the connector base 9, and the two are slidably connected, so that the sliding sleeve 10 can slide along the axial direction of the connector base 9. One end of the connecting spring 11 is connected to the connector base 9, and the other end is connected to the sliding sleeve 10, providing a reset elastic force for the sliding sleeve 10. The limiting ball 13 is placed in the spherical groove 12 on the connector base 9. The limiting ball 13 can move within a small range in the spherical groove 12. The connecting pipe 6 is inserted into the connector base 9. When the connecting pipe 6 is inserted into the appropriate position, the limiting groove 14 on its periphery is aligned with the limiting ball 13. The pushing protrusion 15 on the sliding sleeve 10 can push the limiting ball 13 into the limiting groove 14 when the sliding sleeve 10 slides.

[0017] The implementation principle of the above embodiment is as follows: When installing the connecting pipe 6, insert the connecting pipe 6 into the connector base 9, push the sliding sleeve 10 to compress the connecting spring 11, push the protrusion 15 to push the limiting ball 13 into the limiting slot 14, and complete the connection between the connecting pipe 6 and the connecting pipe 5; when disassembling, pull the sliding sleeve 10 in the opposite direction, the connecting spring 11 extends, pushes the protrusion 15 to disengage from the limiting ball 13, the limiting ball 13 exits from the limiting slot 14, and the connecting pipe 6 can be pulled out. This connection method is convenient and quick, and facilitates the replacement and maintenance of the pipeline.

[0018] Reference Figure 4 One embodiment shown is as follows: The limiting mechanism 7 includes a fixing ring 16. In this embodiment, the fixing ring 16 is fixed in the adjusting housing 2 by welding or bolt connection, etc., to provide a supporting foundation for the subsequent limiting structure. A number of limiting teeth 17 are provided on the inner side of the fixing ring 16. These limiting teeth 17 are used to cooperate with other structures to limit the rotation angle of the connecting pipe 5.

[0019] The implementation principle of the above embodiment is as follows: when it is necessary to limit the rotation angle of the connecting pipe 5, the limiting tooth 17 is locked by the interaction with the limiting tooth 17 to limit the rotation angle of the connecting pipe 5, thereby ensuring that the differential pressure switch works stably at the set angle and meeting the requirements of different working conditions for the pressure detection angle.

[0020] Reference Figure 3 , Figure 4One embodiment shown is as follows: The fixing rod 18 is fixed to the connecting pipe 5, and the two can be connected by welding or integral molding to ensure that the fixing rod 18 can rotate together with the connecting pipe 5. The fixing spring 19 is sleeved on the fixing rod 18, with one end fixedly connected to the fixing rod 18 and the other end fixedly connected to the fixing sleeve 20, providing elasticity to the fixing sleeve 20. The fixing sleeve 20 is slidably connected to the fixing rod 18 and can slide along the axial direction of the fixing rod 18. A limiting groove 21 is opened between adjacent limiting teeth 17, and a retaining tooth 22 is fixedly connected to the end of the fixing sleeve 20 near the fixing ring 16.

[0021] The implementation principle of the above embodiment is as follows: When adjusting the angle of the connecting pipe 5, the fixed sleeve 20 is pulled to compress the fixed spring 19, and the locking tooth 22 disengages from the limiting groove 21. At this time, the connecting pipe 5 can be rotated. After rotating to a suitable angle, the fixed sleeve 20 is released. Under the elastic force of the fixed spring 19, the locking tooth 22 is inserted into the limiting groove 21 and cooperates with the limiting tooth 17 to achieve precise limitation of the rotation angle of the connecting pipe 5.

[0022] The working principle of this device is as follows: During connection, the connecting pipe 6 is inserted into the connector base 9, and its end squeezes the limiting ball 13 to retract into the spherical groove 12. When the connecting pipe 6 is in place, the limiting slot 14 aligns with the limiting ball 13, pushing the sliding sleeve 10 compresses the connecting spring 11, pushing the protrusion 15 to push the limiting ball 13 into the limiting slot 14, thus fixing the connecting pipe 6 to the connecting pipe 5. During disassembly, the sliding sleeve 10 is pulled in the opposite direction, the connecting spring 11 extends, pushing the protrusion 15 away from the limiting ball 13, and the limiting ball 13 exits from the limiting slot 14, allowing the connecting pipe 6 to be pulled out, achieving quick and convenient pipe replacement and maintenance. When the angle of the connecting pipe 5 needs to be adjusted, pull the fixing sleeve 20 to overcome the elastic force of the fixing spring 19, causing the locking tooth 22 to disengage from the limiting groove 21. At this time, the connecting pipe 5 can be rotated. After rotating to the appropriate angle, release the fixing sleeve 20. Under the action of the elastic force of the fixing spring 19, the locking tooth 22 inserts into the limiting groove 21 and cooperates with the limiting tooth 17 on the inner side of the fixing ring 16, precisely limiting the rotation angle of the connecting pipe 5 to meet the strict requirements of the pressure detection angle under different working conditions, and ensuring that the differential pressure switch accurately detects the pressure.

[0023] The working principle of this device has been explained through the above embodiments. These embodiments only illustrate several implementation methods of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A differential pressure switch, comprising a switch body (1), characterized in that: The switch body (1) is provided with an adjustment housing (2), and an adjustment cavity (3) is provided inside the adjustment housing (2); the switch body (1) is provided with two connecting ends (4), and two connecting pipes (5) are provided inside the adjustment cavity (3). The connecting pipes (5) and the connecting ends (4) can rotate relative to each other. The connecting pipes (5) have an L-shaped structure, and the top of the connecting pipes (5) penetrates through the adjustment housing (2). The free end of the connecting pipes (5) is detachably connected to a connecting pipe (6). The adjustment cavity (3) is provided with a limiting mechanism (7) that can limit the rotation angle of the connecting pipes (5). A disassembly mechanism (8) is provided between the connecting pipes (6) and the connecting pipes (5).

2. A differential pressure switch according to claim 1, characterized in that: The disassembly mechanism (8) includes a connector base (9), which is fixedly connected to the connecting pipe (5). A sliding outer sleeve (10) is provided on the outside of the connector base (9). A connecting spring (11) is connected to the connector base (9), and the other end of the connecting spring (11) is connected to the sliding outer sleeve (10). A plurality of spherical grooves (12) are provided on the connector base (9). A limiting ball (13) is movably connected in each spherical groove (12). An annular limiting slot (14) is provided on the periphery of the connecting pipe (6). The connecting pipe (6) can be inserted into the connector base (9). The limiting ball (13) can be inserted into the limiting slot (14). A pushing protrusion (15) is provided on the sliding outer sleeve (10) that can push the limiting ball (13) into the limiting slot (14).

3. A differential pressure switch according to claim 2, characterized in that: The limiting mechanism (7) includes a fixing ring (16), which is fixedly connected inside the adjusting housing (2), and the inner side of the fixing ring (16) is provided with a plurality of limiting teeth (17).

4. A differential pressure switch according to claim 3, characterized in that: A fixing rod (18) is provided on the connecting pipe (5), a fixing spring (19) is provided on the fixing rod (18), a fixing sleeve (20) is slidably connected on the fixing rod (18), and the other end of the fixing spring (19) is fixedly connected to the fixing sleeve (20); a limiting groove (21) is opened between two adjacent limiting teeth (17), and a locking tooth (22) that can be inserted into the limiting groove (21) is provided on the end of the fixing sleeve (20) near the fixing ring (16).

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