Flexible pressure switch

Abstract

The utility model relates to the technical field of pressure switches, in particular to a flexible pressure switch, which comprises a probe, a flexible tube and a switch box which are sequentially connected. The probe comprises a ball head and a ball head seat, the ball head can rotate and incline in the ball head seat, a hole is formed in the ball head and communicated with one end of an internal channel of the flexible pipe, the other end of the internal channel of the flexible pipe is connected with a switch mechanism arranged in the switch box, the switch mechanism comprises a straight channel communicated with the flexible pipe, and a resettable piston is arranged in the straight channel. A microswitch is arranged at the end, away from the flexible pipe, of the piston, a damping connecting piece is connected to the outer side of the switch box, a limiting groove is formed in the inner wall of the straight channel, a clamping block located in the limiting groove is arranged on the outer wall of the piston, and a first compression spring is arranged between the side, close to the microswitch, of the clamping block and the limiting groove. According to the utility model, a split structure is adopted, the arrangement is convenient, the arrangement position of the switch box is adjustable, and the on-site installation requirement is better met; the shockproof performance is strong, and installation firmness and operation stability of internal components of the switch are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure switches, in particular to a flexible pressure switch. Background Art

[0002] A pressure switch is a pressure detection device that is installed on a pipe or container containing the measured medium. Traditional pressure switches are usually made of hard materials, with a fixed structure. In some cases, the layout is not flexible enough, the space occupied is large, and the shockproof performance is weak. Therefore, designing a bendable flexible pressure switch has broad market prospects and application value. Summary of the invention

[0003] The purpose of the utility model is to provide a flexible pressure switch, which adopts a split structure, has a narrow and long middle section that is flexible and bendable, is easy to arrange, and has strong shockproof performance.

[0004] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0005] A flexible pressure switch comprises a probe, a flexible tube and a switch box connected in sequence; the probe comprises a ball head and a ball head seat, the ball head can rotate and tilt in the ball head seat, the opening in the ball head is connected to one end of the internal channel of the flexible tube, the other end of the internal channel of the flexible tube is connected to a switch mechanism provided in the switch box, the switch mechanism comprises a straight channel connected to the flexible tube, a resettable piston is provided in the straight channel, a micro switch is provided at one end of the piston away from the flexible tube, and a shock-absorbing connector is connected to the outside of the switch box.

[0006] Furthermore, a limiting groove is provided on the inner wall of the straight path, and a clamping block located in the limiting groove is provided on the outer wall of the piston. A compression spring is provided between the side of the micro switch close to the clamping block and the limiting groove. When the piston moves toward the micro switch, it can squeeze the driving rod extending out of the micro switch.

[0007] Furthermore, the shock-absorbing connecting piece includes a screw hole seat provided on the outside of the switch box, a screw rod is inserted into the screw hole seat, bosses are provided on the outside of the screw rod above and below the screw hole seat, and the screw rod is provided with threads under the boss located below, and two compression springs are provided between the upper and lower bosses and the screw hole seat, and the two compression springs are surrounded by the outer periphery of the screw rod.

[0008] Furthermore, a sealing gasket is provided between the ball head and the ball head seat, and the sealing gasket is fixed to the ball head seat.

[0009] Furthermore, a protective spiral wire is wound around the periphery of the flexible tube.

[0010] Furthermore, the compression spring presses the piston toward the direction of the flexible tube.

[0011] Furthermore, the number of the shock-absorbing connectors is ≥4.

[0012] The beneficial effects of adopting the technical solution of the utility model are:

[0013] The utility model provides a flexible pressure switch, which adopts a split structure, with a narrow and flexible middle section that is easy to arrange, and a relatively large switch box with adjustable setting position to better meet on-site installation requirements; a shock-absorbing connector is provided with strong shock-proof performance to ensure the secure installation and operational stability of the internal components of the switch; a protective spiral wire is provided on the periphery of the flexible tube to prevent the flexible tube from being squeezed, worn and broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the A_A section structure;

[0017] Figure 3 for Figure 1 Schematic diagram of the cross-section structure along the B_B axis;

[0018] Figure 4 for Figure 1 The enlarged schematic diagram at C in the middle;

[0019] Figure 5 for Figure 2 The enlarged schematic diagram at D in the middle;

[0020] Figure 6 for Figure 3 The enlarged schematic diagram at E in the middle;

[0021] Markings in the figure: 1, probe; 1a, ball head; 1b, ball head seat; 1c, sealing gasket; 2, flexible tube; 3, switch box; 3a, straight track; 3a-1, limit groove; 3b, piston; 3b-1, block; 3c, micro switch; 4, shock-absorbing connector; 4a, screw hole seat; 4b, screw; 4c, boss; 4d, compression spring 2. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] Please refer to Figures 1 to 6 A flexible pressure switch comprises a probe 1, a flexible tube 2 and a switch box 3 connected in sequence; the probe 1 comprises a ball head 1a and a ball head seat 1b, a sealing gasket 1c is arranged between the ball head 1a and the ball head seat 1b, the sealing gasket 1c is fixed to the ball head seat 1b, the ball head 1a can rotate and tilt at multiple angles in the ball head seat 1b, an opening in the ball head 1a is connected to one end of an internal channel of the flexible tube 2, and the other end of the internal channel of the flexible tube 2 is connected to a switch mechanism arranged in the switch box 3. When in use, the probe 1 is installed and fixed on a container or pipeline to be measured, and the medium contacts the switch mechanism through the flexible tube 2. The flexible tube 2 makes the relatively large switch box 3 adjustable in position, and the ball head connection structure provides a large degree of freedom of movement, and the connection between the flexible tube 2 and the probe 1 is flexible in steering.

[0024] Specifically, the switch mechanism includes a straight channel 3a connected to the flexible tube 2, a resettable piston 3b is arranged in the straight channel 3a, a micro switch 3c is arranged at one end of the piston 3b away from the flexible tube 2, a limiting groove 3a-1 is arranged on the inner wall of the straight channel 3a, and a block 3b-1 located in the limiting groove 3a-1 is arranged on the outer wall of the piston 3b. The cooperation between the limiting groove 3a-1 and the block 3b-1 prevents the piston 3b from falling out of the straight channel 3a, and a compression spring 1 is arranged between one side of the micro switch 3c close to the block 3b-1 and the limiting groove 3a-1, and the compression spring 1 is arranged to the flexible tube 2 at the position of the micro switch 3c. The piston 3b is squeezed in the direction. When the pressure does not reach the set value, the piston 3b does not contact the micro switch 3c. When the medium pressure transmitted from the flexible tube 2 pushes the piston 3b to move toward the micro switch 3c against the squeezing force of the compression spring 1, one end of the piston 3b can squeeze the micro switch 3c to extend the external driving rod. The driving rod transmits the external force to the internal spring structure, pushing the movable contact to perform a switching action, thereby realizing the on-off function of the control circuit. The principle of the micro switch 3c is based on its structure and design, and triggers the on-off function of the circuit through a tiny force or displacement.

[0025] In order to enhance the shockproof performance of the pressure switch, the switch box 3 is connected to the outside with ≥4 shock-absorbing connectors 4, each of which includes a screw hole seat 4a provided on the outside of the switch box 3, a screw rod 4b is inserted in the screw hole seat 4a, bosses 4c are provided outside the screw rod 4b above and below the screw hole seat 4a, and the screw rod 4b is provided with threads under the bosses 4c located below, and a compression spring 2 4d is provided between the upper and lower bosses 4c and the screw hole seat 4a, and the compression spring 2 4d surrounds the outer periphery of the screw rod 4b. When vibrated, the compression spring 2 4d is subjected to the action of external force and undergoes elastic deformation. This deformation can absorb energy, and through the elastic restoring force of the compression spring 2 4d, the vibrated object is brought back to its original position, thereby reducing the impact of vibration and ensuring the reliable installation and operational stability of the internal components of the switch.

[0026] In addition, a protective spiral wire is wound around the outer periphery of the flexible tube 2 . The protective spiral wire protects the flexible tube 2 (to prevent it from being squeezed, worn, or broken) while not affecting the flexible bending of the flexible tube 2 .

[0027] The above embodiments of the present invention are for inspiration. Through the above description, relevant technicians can make various changes and modifications without departing from the technical concept of the present invention. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A flexible pressure switch, characterized in that: The invention comprises a probe (1), a flexible tube (2) and a switch box (3) which are connected in sequence; the probe (1) comprises a ball head (1a) and a ball head seat (1b); the ball head (1a) can rotate and tilt in the ball head seat (1b); an opening in the ball head (1a) is connected to one end of an internal channel of the flexible tube (2); the other end of the internal channel of the flexible tube (2) is connected to a switch mechanism provided in the switch box (3); the switch mechanism comprises a straight channel (3a) connected to the flexible tube (2); a resettable piston (3b) is provided in the straight channel (3a); a micro switch (3c) is provided at one end of the piston (3b) away from the flexible tube (2); and a shock-absorbing connecting piece (4) is connected to the outside of the switch box (3).

2. A flexible pressure switch according to claim 1, characterized in that: The inner wall of the straight track (3a) is provided with a limiting groove (3a-1), the outer wall of the piston (3b) is provided with a clamping block (3b-1) located in the limiting groove (3a-1), and a compression spring 1 is provided between the limiting groove (3a-1) and one side of the micro switch (3c) close to the clamping block (3b-1), so that when the piston (3b) moves toward the micro switch (3c), the compression spring can squeeze the driving rod extending out of the micro switch (3c).

3. A flexible pressure switch according to claim 1, characterized in that: The shock-absorbing connecting member (4) comprises a screw hole seat (4a) provided on the outside of the switch box (3), a screw rod (4b) being inserted into the screw hole seat (4a), bosses (4c) being provided on the outside of the screw rod (4b) above and below the screw hole seat (4a), the screw rod (4b) being provided with threads under the boss (4c) located below, and compression springs (4d) being provided between the upper and lower bosses (4c) and the screw hole seat (4a), the compression springs (4d) being arranged around the outer periphery of the screw rod (4b).

4. A flexible pressure switch according to claim 1, characterized in that: A sealing gasket (1c) is provided between the ball head (1a) and the ball head seat (1b), and the sealing gasket (1c) is kept fixed to the ball head seat (1b).

5. A flexible pressure switch according to claim 2, characterized in that: The compression spring presses the piston (3b) in the direction of the flexible tube (2).

6. A flexible pressure switch according to claim 3, characterized in that: The number of the shock-absorbing connecting members (4) is ≥4.

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