Capacitance liquid level switch

Abstract

The utility model discloses a capacitance liquid level switch which comprises a switch body, a first detection rod is installed at the lower end of the switch body, a second detection rod is arranged below the first detection rod, a third detection rod is arranged below the second detection rod, fixing rings are installed at the lower ends of the first detection rod and the second detection rod, and matching rings are installed at the upper ends of the second detection rod and the third detection rod. A limiting mechanism is arranged on the outer surfaces of the fixing ring and the matching ring and comprises a first semi-arc groove block and a second semi-arc groove block, and a fixing block is installed at the other end of the first semi-arc groove block. According to the utility model, a plurality of second detection rods can be installed according to actual requirements to increase the overall length of the detection rods so as to adapt to different use requirements, and the applicability is strong.

Description

Technical Field

[0001] The utility model relates to the field of capacitance liquid level switches, in particular to a capacitance liquid level switch. Background Art

[0002] The capacitive liquid level switch determines whether there is a medium or air by detecting the conductivity or insulation rate of the medium. Capacitance is formed between the liquid level switch and the medium (liquid or air) in which it is located. When the probe tip of the capacitive liquid level switch is immersed in the liquid, the capacitance changes greatly and the FET switch changes state. The capacitive liquid level switch can be used in relatively clean, conductive, non-layered liquids. Including industrial fluids such as process water and hydrogen peroxide. The detection rod length of the existing capacitive liquid level switch is fixed, and the overall length of the detection rod cannot be increased according to actual needs. It can only be replaced with other capacitive liquid level switches, and the applicability is poor. Therefore, those skilled in the art provide a capacitive liquid level switch to solve the problems raised in the above background technology. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a capacitive liquid level switch, including a switch body, a detection rod 1 is installed at the lower end of the switch body, a detection rod 2 is arranged below the detection rod 1, and a detection rod 3 is arranged below the detection rod 2, a fixing ring is installed at the lower end of the detection rod 1 and the detection rod 2, a matching ring is installed at the upper end of the detection rod 2 and the detection rod 3, and a limiting mechanism is arranged on the outer surfaces of the fixing ring and the matching ring, and the limiting mechanism includes a semi-arc groove block 1 and a semi-arc groove block 2, and a fixing block is installed at the other end of the semi-arc groove block 1;

[0004] A slot is provided at the lower rear end of the fixed block, a cavity is provided inside the fixed block, a pull block is slidably connected inside the cavity, a pull rod is installed at the upper end of the pull block, a spring is sleeved on the outer surface of the pull rod, and the spring is located in the cavity, a positioning block is installed at the lower end of the pull block, and the positioning block passes through the upper end of the slot, a connecting block is installed at the other end of the semi-arc slot block, an insert block is installed at the front end of the connecting block, a positioning groove is provided at the upper end of the insert block, and the positioning groove corresponds to the position of the positioning block.

[0005] Preferably, four alignment blocks are symmetrically mounted on the lower end of the fixing ring.

[0006] Preferably, four alignment grooves are symmetrically provided on the upper end of the matching ring, and the alignment grooves correspond to the positions of the alignment blocks.

[0007] Preferably, a hinge is installed at one end of the semi-arc slot block 1 and the semi-arc slot block 2.

[0008] Preferably, the pull rod passes through the fixing block and is installed on the buckle pull block.

[0009] Preferably, the front end surface of the plug is a curved surface.

[0010] Technical effects and advantages of the utility model:

[0011] The utility model can install a plurality of detection rods 2 according to actual needs to increase the overall length of the detection rod, so as to adapt to different use requirements and has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of this application;

[0013] Figure 2 It is a schematic diagram of the structure of the fixing ring and the matching ring of the present application;

[0014] Figure 3 It is a structural schematic diagram of the limiting mechanism of this application;

[0015] Figure 4 It is a schematic diagram of the structure of the fixed block of this application;

[0016] In the figure: 1. switch body; 2. detection rod 1; 3. detection rod 2; 4. detection rod 3; 5. fixing ring; 6. alignment block; 7. matching ring; 8. alignment groove; 9. limit mechanism; 10. semi-arc groove block 1; 11. semi-arc groove block 2; 12. fixing block; 13. slot; 14. cavity; 15. pull block; 16. positioning block; 17. pull rod; 18. spring; 19. buckle pull block; 20. connecting block; 21. plug block; 22. positioning groove. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes.

[0018] See also Figures 1 to 4In this embodiment, a capacitive liquid level switch is provided, including a switch body 1, a detection rod 1 2 is installed at the lower end of the switch body 1, a detection rod 2 3 is arranged below the detection rod 1 2, a detection rod 3 4 is arranged below the detection rod 2 3, a fixing ring 5 is installed at the lower ends of the detection rod 1 2 and the detection rod 2 3, four alignment blocks 6 are symmetrically installed at the lower end of the fixing ring 5, a matching ring 7 is installed at the upper ends of the detection rod 2 3 and the detection rod 3 4, four alignment grooves 8 are symmetrically arranged at the upper end of the matching ring 7, and the alignment grooves 8 correspond to the positions of the alignment blocks 6, and a limiting mechanism 9 is arranged on the outer surfaces of the fixing ring 5 and the matching ring 7, and the limiting mechanism 9 includes a semi-arc groove block 10 and a semi-arc groove block 2 11, and a matching ring 7 is installed at one end of the semi-arc groove block 10 and the semi-arc groove block 2 11. Page, a fixed block 12 is installed at the other end of the semi-arc slot block 10, and a slot 13 is opened at the lower part of the rear end of the fixed block 12. A cavity 14 is arranged inside the fixed block 12, and a pull block 15 is slidably connected inside the cavity 14. A pull rod 17 is installed at the upper end of the pull block 15, and the pull rod 17 passes through the fixed block 12 and is installed with a buckle pull block 19. A spring 18 is sleeved on the outer surface of the pull rod 17, and the spring 18 is located in the cavity 14. A positioning block 16 is installed at the lower end of the pull block 15, and the positioning block 16 passes through the upper end of the slot 13. A connecting block 20 is installed at the other end of the semi-arc slot block 21, and an insert block 21 is installed at the front end of the connecting block 20. The front end surface of the insert block 21 is an arc surface, and a positioning groove 22 is opened at the upper end of the insert block 21, and the positioning groove 22 corresponds to the position of the positioning block 16.

[0019] The working principle of the utility model is as follows: the fixing ring 5 and the matching ring 7 are fitted together, and the semi-arc groove block 10 and the semi-arc groove block 2 11 are rotated together and sleeved on the outer surfaces of the fixing ring 5 and the matching ring 7 through the hinge, and the pull rod 17 is driven to rise by the buckle pull block 19, and the pull rod 17 drives the pull block 15 and the positioning block 16 to rise, and the spring 18 is compressed by the pull block 15, so that the positioning block 16 rises and leaves the slot 13. When the insertion block 21 is inserted into the slot 13, the buckle pull block 19 is released, and the pull block 15 is pushed to reset by the spring 18, and the pull block 15 drives the positioning block 16 to reset and insert into the positioning slot 22, fixing the position of the insertion block 21, so that the semi-arc groove block 10 and the semi-arc groove block 2 11 are fixedly connected together, limiting the position of the fixing ring 5 and the matching ring 7, so that the detection rod 1 2, the detection rod 2 3 and the detection rod 3 4 are connected together, and multiple detection rods 2 3 can be installed according to the above method according to actual needs to increase the overall length of the detection rod, so as to adapt to different usage requirements, and the applicability is strong.

[0020] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A capacitive liquid level switch, comprising a switch body (1), characterized in that: A detection rod 1 (2) is installed at the lower end of the switch body (1), a detection rod 2 (3) is arranged below the detection rod 1 (2), a detection rod 3 (4) is arranged below the detection rod 2 (3), a fixing ring (5) is installed at the lower ends of the detection rod 1 (2) and the detection rod 2 (3), a matching ring (7) is installed at the upper ends of the detection rod 2 (3) and the detection rod 3 (4), a limiting mechanism (9) is arranged on the outer surfaces of the fixing ring (5) and the matching ring (7), the limiting mechanism (9) comprises a semi-arc groove block 1 (10) and a semi-arc groove block 2 (11), and a fixing block (12) is installed at the other end of the semi-arc groove block 1 (10); A slot (13) is provided at the lower part of the rear end of the fixed block (12), a cavity (14) is provided inside the fixed block (12), a pull block (15) is slidably connected inside the cavity (14), a pull rod (17) is installed at the upper end of the pull block (15), a spring (18) is sleeved on the outer surface of the pull rod (17), and the spring (18) is located in the cavity (14), a positioning block (16) is installed at the lower end of the pull block (15), and the positioning block (16) passes through the upper end of the slot (13), a connecting block (20) is installed at the other end of the semi-arc slot block (11), an insert block (21) is installed at the front end of the connecting block (20), a positioning groove (22) is provided at the upper end of the insert block (21), and the positioning groove (22) corresponds to the position of the positioning block (16).

2. A capacitive liquid level switch according to claim 1, characterized in that: Four alignment blocks (6) are symmetrically mounted on the lower end of the fixing ring (5).

3. A capacitive liquid level switch according to claim 1, characterized in that: Four alignment grooves (8) are symmetrically formed on the upper end of the matching ring (7), and the alignment grooves (8) correspond to the positions of the alignment blocks (6).

4. A capacitive liquid level switch according to claim 1, characterized in that: A hinge is installed at one end of the semi-arc groove block 1 (10) and the semi-arc groove block 2 (11).

5. A capacitive liquid level switch according to claim 1, characterized in that: The pull rod (17) passes through the fixed block (12) and is installed on the buckle pull block (19).

6. A capacitive liquid level switch according to claim 1, characterized in that: The front end surface of the insert block (21) is a curved surface.

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