CN210321890U

CN210321890U - Tuning fork liquid level switch convenient to maintain and overhaul

Info

Publication number: CN210321890U
Application number: CN201921304553.0U
Authority: CN
Inventors: 周文凯; 王亚鹏
Original assignee: Shanghai Xiaoqing Electronic Technology Co Ltd
Current assignee: Shanghai Xiaoqing Electronic Technology Co Ltd
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2020-04-14
Anticipated expiration: 2029-08-12

Abstract

The utility model discloses a tuning fork liquid level switch convenient to maintain and overhaul, which relates to the technical field of liquid level detection and aims to solve the technical problems that the existing tuning fork liquid level switch is complex in disassembly process and inconvenient to disassemble; the casing includes inner shell and shell, is provided with the holding chamber in the middle of the inner shell, and the circuit part is fixed in the holding intracavity, and the department of laminating mutually of inner shell and shell is provided with the butt joint groove, and the butt joint inslot is along radially being provided with the inserting groove, and the inserting groove is provided with the locking groove along casing circumference, and the shell lateral wall is provided with the locking piece, locking piece and inserting groove and locking groove looks adaptation. The circuit part of the tuning fork liquid level switch is convenient to detach and replace.

Description

Tuning fork liquid level switch convenient to maintain and overhaul

Technical Field

The utility model relates to a liquid level detection technical field, more specifically say, it relates to a tuning fork liquid level switch convenient to maintain and overhaul.

Background

The tuning fork liquid level switch is one of liquid level control switches, and a tuning fork is excited by a crystal to generate vibration, and when the tuning fork is immersed by liquid or an object, the vibration frequency changes, and the frequency change is detected by an electronic circuit and outputs a switching value.

The current chinese patent that the bulletin number is CN205984792U of granting, a tuning fork thing liquid level switch is disclosed, which comprises a housin, the lower extreme of casing is connected with the sleeve pipe, the nut has been cup jointed to the one end that the casing was kept away from to the sleeve pipe, the sheathed tube one end has been cup jointed to the nut, the upper end of connecting rod becomes the screw thread form setting, the connecting rod cup joints with the nut screw thread through sealed thread seal tape, the one end that the nut was kept away from to the connecting rod is connected with the tuning fork, the tuning fork is provided with two, be provided with display lamp and switch on the casing, display lamp and switch electric connection, the inner chamber of casing is provided with two piezoelectric wafer, a piezoelectric wafer drive tuning.

However, the circuit part of the conventional tuning fork liquid level switch is easily damaged in a complicated working environment, but the conventional tuning fork liquid level switch is complicated in disassembly process and inconvenient to disassemble, so that the improvement is needed.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a tuning fork liquid level switch convenient to maintain and overhaul, its circuit part convenient to detach who has tuning fork liquid level switch and the advantage of changing.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a tuning fork liquid level switch convenient to maintain and overhaul comprises a shell, a sleeve, a connecting rod and a fork body, wherein the sleeve is connected to the lower end of the shell; the casing includes inner shell and shell, be provided with the holding chamber in the middle of the inner shell, the circuit part is fixed in the holding intracavity, the department of laminating mutually of inner shell and shell is provided with the butt joint groove, the butt joint inslot is along radially being provided with the inserting groove, the inserting groove is provided with the locking groove along casing circumference, the shell lateral wall is provided with the locking piece, locking piece and inserting groove and locking groove looks adaptation.

Through adopting above-mentioned technical scheme, the lock piece is inserted and is established in the inserting groove and through rotating the shell joint in the lock groove, has realized the fixed of shell with the inner shell, has saved longer threaded connection process to be convenient for realize the quick dismantlement of shell in the life that needs overhauld the inside circuit part of inner shell, thereby be convenient for the circuit part dismantlement and the change of tuning fork liquid level switch.

Furthermore, a rubber ring is arranged at the joint of the inner side wall of the outer shell and the inner shell.

Through adopting above-mentioned technical scheme, the setting of rubber ring produces an elastic force along the shell axial when shell and inner shell looks butt to support the locking piece tightly on the lateral wall in locking groove, help alleviating the pine of locking piece when the vibration and taking off.

Furthermore, the top end of the shell is provided with an observation hole, and a transparent observation plate is arranged in the observation hole.

Through adopting above-mentioned technical scheme, the setting of observation hole is convenient for observe the inside circuit part operating condition of shell from the shell outside, and the setting of transparent observation board can also see through the inside condition of transparent observation board and see clearly the shell when carrying out the confined to the observation hole.

Further, the circuit part comprises an operating plate, a first side plate and a second side plate, the operating plate is fixedly connected with the first side plate, and the first side plate and the second side plate are detachably connected.

Through adopting above-mentioned technical scheme, thereby first curb plate can dismantle with the second curb plate and be connected and make the second curb plate can follow first curb plate and dismantle and change alone, and need not change whole circuit part to circuit part's maintainability has been improved.

Further, one side of the first side plate close to the second side plate is provided with a connector male end, one side of the second side plate close to the first side plate is provided with a connector female end, and the connector male end is inserted into the connector female end.

Through adopting above-mentioned technical scheme, the setting of connector female end and connector public end is convenient for be connected together first curb plate and second curb plate, not only plays the effect of electricity connection, can also be fixed first curb plate and second curb plate together and convenient to detach changes.

Furthermore, the inner side wall of the accommodating cavity is provided with a butt elastic piece, one end of the butt elastic piece is fixed on the inner side wall of the accommodating cavity, and the other end of the butt elastic piece is abutted to the second side plate.

Through adopting above-mentioned technical scheme, the setting of butt elastic component is convenient for fix whole circuit part in the holding chamber through butt second curb plate to it can the pine take off fixedly still to be convenient for through pressing the butt elastic component through the butt elastic component is fixed, thereby is convenient for dismantle the circuit part.

Furthermore, the abutting plate is arranged at one end, abutted against the second side plate, of the abutting elastic piece.

Through adopting above-mentioned technical scheme, the area of contact between butt elastic component and the second curb plate has been increased in setting up of butt board to thereby make butt elastic component butt second curb plate better fix the circuit part better.

Further, a protective rubber pad is arranged on the surface of one side, close to the second side plate, of the abutting plate.

Through adopting above-mentioned technical scheme, the setting of protective rubber pad has increased the one deck protective layer on the surface that the butt board is close to the second curb plate to alleviateed the damage of butt board electronic components solder joint on to the second curb plate, increased area of contact simultaneously, be more convenient for carry out the butt to the second curb plate.

To sum up, the utility model discloses following beneficial effect has:

1. the technology that the inner shell, the outer shell, the accommodating cavity, the inserting groove, the locking block and the rubber ring are matched is adopted, so that the effect that the outer shell and the inner shell are convenient to detach and mount, and the circuit part in the outer shell is convenient to maintain is achieved;

2. the circuit is connected by the operating plate, the first side plate, the second side plate and the connector male end and the connector female end, so that the circuit part is convenient to detach, disassemble and replace, and the replaceability of the circuit part is improved;

3. the butt elastic piece, the butt plate and the protection rubber pad matched with technology are adopted, so that the effect of convenient disassembly when the circuit part is fixed in the inner shell is generated.

Drawings

FIG. 1 is a schematic diagram of an overall structure of a tuning fork level switch for easy maintenance and repair in an embodiment;

FIG. 2 is a schematic diagram for showing a structure at a circuit portion in the embodiment;

fig. 3 is a schematic diagram for showing a structure of the accommodating cavity in the embodiment.

In the figure: 1. a housing; 11. a sleeve; 12. a connecting rod; 13. a fork body; 14. an inner shell; 141. an accommodating cavity; 15. a housing; 151. a locking block; 152. a rubber ring; 2. a circuit portion; 21. an operation panel; 22. a first side plate; 221. a male end of the connector; 23. a second side plate; 231. a connector female end; 3. a butt joint groove; 31. inserting grooves; 311. a locking groove; 4. an observation hole; 41. a transparent viewing plate; 5. abutting against the elastic member; 51. a butt joint plate; 511. protecting the rubber pad.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

a tuning fork liquid level switch convenient for maintenance and overhaul is disclosed, referring to FIG. 1, which comprises a casing 1, a sleeve 11, a connecting rod 12 and a fork 13, wherein the sleeve 11 is connected at the lower end of the casing 1, the connecting rod 12 is connected at one side of the sleeve 11 far away from the casing 1, the fork 13 is arranged at one end of the connecting rod 12 far away from the sleeve 11, a circuit part 2 is arranged inside the casing 1, and the fork 13 is excited by a crystal in the circuit part 2 to generate vibration so as to respond after liquid or object submerges the tuning fork.

Referring to fig. 1, the case 1 includes an inner case 14 and an outer case 15, the case 1 is cylindrical and made of aluminum alloy, an accommodating chamber 141 is provided in the middle of the inner case 14, and the circuit part 2 is fixed in the accommodating chamber 141. The joint of the inner shell 14 and the outer shell 15 is provided with a butt joint groove 3, the butt joint groove 3 is annular and is recessed in the surface of the inner shell 14. The docking slot 3 is internally provided with four insertion slots 31 along the radial direction, the four insertion slots 31 are uniformly distributed on the outer side wall of the docking slot 3, and the insertion slots 31 extend from the top end of the inner shell 14 to the bottom end of the docking slot 3.

Referring to fig. 1, the insertion groove 31 is provided with a locking groove 311 along the axial direction of the housing 1, and the locking groove 311 communicates with the insertion groove 31. The inside wall of the outer shell 15 is provided with a locking block 151, the locking block 151 is also provided with four, the locking block 151 is matched with the insertion groove 31 and the locking groove 311, when the outer shell 15 is fixed on the inner shell 14, the locking block 151 is inserted from the top end of the insertion groove 31 and rotates under the external force to be inserted into the locking groove 311, and therefore the quick disassembly of the outer shell 15 is achieved, and the circuit part 2 inside the outer shell 15 is convenient to overhaul.

Referring to fig. 1, a rubber ring 152 is disposed at a joint of an inner side wall of the outer casing 15 and the inner casing 14, an outer diameter of the rubber ring 152 is communicated with an inner diameter of the outer casing 15, the rubber ring 152 is fixed on a top wall of the inner side of the outer casing 15 in a cementing manner, and the rubber ring 152 generates an upward abutting force to the outer casing 15 after being pressed by a force.

Referring to fig. 1, the top end of the housing 15 is provided with a viewing hole 4, the viewing hole 4 is a circular through hole, and the viewing hole 4 penetrates through the top wall of the entire housing 15. A transparent observation plate 41 is arranged in the observation hole 4, the transparent observation plate 41 is made of acrylic plastic, and the transparent observation plate 41 is adhered to the top wall of the inner side of the casing 15, so that an operator can clearly see the working state of the circuit part 2 in the casing 15 through the transparent observation plate 41.

Referring to fig. 2, the circuit portion 2 includes an operation board 21, a first side board 22 and a second side board 23, the operation board 21, the first side board 22 and the second side board 23 are all PCB printed circuit boards, and each electronic component is soldered on the operation board 21, the first side board 22 and the second side board 23 through a pin. The operation plate 21 and the first side plate 22 are fixed by pin welding, and the first side plate 22 and the second side plate 23 are detachably connected.

Referring to fig. 2, a connector male end 221 is disposed on one side of the first side plate 22 close to the second side plate 23, the connector is preferably a BTB connector, the male end is a pin, the female end is a slot, and the connector male end 221 is fixed on the first side plate 22 by welding. One side of second curb plate 23 that is close to first curb plate 22 is provided with connector female end 231, and connector female end 231 passes through pin welded fastening on second curb plate 23, and connector male end 221 inserts and establishes in connector female end 231 and fixed through the frictional force joint to make operation panel 21 discrete relatively, be convenient for change alone.

Referring to fig. 3, the inner side wall of the accommodating cavity 141 is provided with an abutting elastic member 5, the abutting elastic member 5 is preferably a spring, one end of the abutting elastic member 5 is fixed on the inner side wall of the accommodating cavity 141 by welding, and the other end of the abutting elastic member abuts against the second side plate 23, so that the second side plate 23 is fixed in the accommodating cavity 141 by the abutting elastic member 5, and the later-stage taking-out is facilitated.

Referring to fig. 3, an end of the abutting elastic member 5 abutting against the second side plate 23 is provided with an abutting plate 51, and the abutting plate 51 is fixed at an end of the abutting elastic member 5 close to the second side plate 23 by welding, so as to increase a contact area between the abutting elastic member 5 and the second side plate 23.

Referring to fig. 3, a protective rubber pad 511 is disposed on a side surface of the abutting plate 51 close to the second side plate 23, the protective rubber pad 511 is preferably made of silicon rubber, the protective rubber pad 511 has the same size as the abutting plate 51, and the protective rubber pad 511 is fixed on the surface of the abutting plate 51 close to the second side plate 23 in a manner of improving adhesion, so that a protective layer is added on the surface of the abutting plate 51 to protect the pin pads on the second side plate 23.

The working principle is as follows:

when circuit part 2 inside casing 1 needs to be installed or overhauled, only need press shell 15 downwards hard, then along circumferential direction shell 15 again for shell 15 overcomes frictional force, and makes locking piece 151 transfer to inserting groove 31 from locking groove 311 in, can be with the locking unblock of shell 15. Then, the locking block 151 slides out of the insertion groove 31 to complete the disassembly of the housing 15, and the circuit part 2 inside the housing 15 can be overhauled.

When it is necessary to take out the circuit part 2 from the housing cavity 141, the abutting plate 51 is pressed with force so that the abutting elastic member 5 contracts, thereby releasing the abutment of the circuit part 2 and enabling the circuit part 2 to be taken out from the housing cavity 141. Due to the connector connection between the second side plate 23 and the first side plate 22, the corresponding part of the connector is separated as required to facilitate replacement of the damaged part.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. A tuning fork liquid level switch convenient to maintain and overhaul comprises a shell (1), a sleeve (11), a connecting rod (12) and a fork body (13), wherein the sleeve (11) is connected to the lower end of the shell (1), the connecting rod (12) is connected to one side, away from the shell (1), of the sleeve (11), the fork body (13) is arranged at one end, away from the sleeve (11), of the connecting rod (12), and a circuit part (2) is arranged inside the shell (1); the method is characterized in that: the casing (1) comprises an inner casing (14) and an outer casing (15), an accommodating cavity (141) is formed in the middle of the inner casing (14), the circuit part (2) is fixed in the accommodating cavity (141), a butt joint groove (3) is formed in the joint of the inner casing (14) and the outer casing (15), an insertion groove (31) is formed in the butt joint groove (3) along the radial direction, a locking groove (311) is formed in the insertion groove (31) along the circumferential direction of the casing (1), a locking block (151) is arranged on the outer side wall of the outer casing (15), and the locking block (151) is matched with the insertion groove (31) and the locking groove (311).

2. The tuning fork level switch convenient to maintain and service of claim 1, wherein: and a rubber ring (152) is arranged at the joint of the inner side wall of the outer shell (15) and the inner shell (14).

3. The tuning fork level switch convenient to maintain and service of claim 2, wherein: the top end of the shell (15) is provided with an observation hole (4), and a transparent observation plate (41) is arranged in the observation hole (4).

4. The tuning fork level switch convenient to maintain and service of claim 1, wherein: the circuit part (2) comprises an operating plate (21), a first side plate (22) and a second side plate (23), the operating plate (21) is fixedly connected with the first side plate (22), and the first side plate (22) is detachably connected with the second side plate (23).

5. The tuning fork level switch convenient to maintain and service of claim 4, wherein: one side that first curb plate (22) is close to second curb plate (23) is provided with connector public end (221), one side that second curb plate (23) is close to first curb plate (22) is provided with connector female end (231), connector public end (221) are inserted and are established in connector female end (231).

6. The tuning fork level switch convenient to maintain and service of claim 5, wherein: the inner side wall of the accommodating cavity (141) is provided with an abutting elastic piece (5), one end of the abutting elastic piece (5) is fixed on the inner side wall of the accommodating cavity (141), and the other end of the abutting elastic piece (5) abuts against the second side plate (23).

7. The tuning fork level switch convenient to maintain and service of claim 6, wherein: and a butting plate (51) is arranged at one end where the butting elastic piece (5) butts against the second side plate (23).

8. The tuning fork level switch convenient to maintain and service of claim 7, wherein: and a protective rubber pad (511) is arranged on the surface of one side, close to the second side plate (23), of the abutting plate (51).