Conveniently-assembled tuning fork liquid level switch

Abstract

The utility model discloses a tuning fork liquid level switch convenient to install, which relates to the technical field of tuning fork liquid level switches and comprises a liquid level switch composed of a junction box main body, an extension rod and a tuning fork, the extension rod is fixed at the bottom end of the junction box main body, and the tuning fork is installed at the bottom end of the extension rod, penetrates through the extension rod and extends into the junction box main body. The top end of the tuning fork is electrically connected with a drive circuit in the junction box body through a piezoelectric plate, and an installation assembly is arranged on the outer side of the extension rod and used for adjusting the installation depth of the tuning fork. According to the utility model, by arranging the mounting assembly, when the liquid level switch is vertically mounted, the mounting depth of the tuning fork can be adjusted by adjusting the position of the sleeve relative to the extension rod, so that the tuning fork can meet the measurement requirements of monitoring point positions with different heights, and the tuning fork is higher in equipment universality and more convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of tuning fork level switch technology, specifically a portable tuning fork level switch. Background Technology

[0002] A tuning fork level switch is a type of level control switch. The working principle of a tuning fork level switch is that a pair of piezoelectric crystals installed on the tuning fork base cause the tuning fork to vibrate at a certain resonant frequency. When the tuning fork of the tuning fork level switch comes into contact with the medium being measured, the frequency and amplitude of the tuning fork will change. These changes of the tuning fork level switch are detected, processed and converted into a switching signal by an intelligent circuit.

[0003] There are two existing installation methods for tuning fork level switches: threaded connection and flange connection. Due to the fixed installation structure, the depth of the tuning fork in the same installation position is fixed. However, in the actual installation process, due to different monitoring points, the tuning fork needs to be placed at different depths in the tank. Traditional switches cannot adjust the installation depth of the tuning fork according to the requirements when fixed, and have weak versatility. Based on this, a portable tuning fork level switch is provided. Utility Model Content

[0004] The purpose of this invention is to provide a portable tuning fork level switch in order to solve the problems mentioned above.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a portable tuning fork level switch, comprising a level switch consisting of a junction box body, an extension rod, and a tuning fork. The extension rod is fixed to the bottom end of the junction box body, and the tuning fork is installed at the bottom end of the extension rod, penetrates the extension rod, and extends into the interior of the junction box body. The top end of the tuning fork is electrically connected to the drive circuit inside the junction box body via a piezoelectric piece. An installation component is provided on the outer side of the extension rod, and the installation component is used to adjust the installation depth of the tuning fork.

[0006] The installation components include an adjustable connection unit, an anti-loosening unit, and a sealing unit;

[0007] The adjustable connecting unit is used to connect with the screw hole at the position to be measured. The installation depth of the tuning fork can be adjusted by moving the adjustable connecting unit along the outer wall of the extension rod.

[0008] The anti-loosening unit is used to provide a locking operation for the adjustable connection unit;

[0009] The sealing unit is used to provide a sealing operation between the adjustable connection unit and the outer wall of the extension rod.

[0010] As a further embodiment of this utility model: the adjustable connection unit includes an adjusting sleeve, a hexagonal block, and a mounting threaded groove;

[0011] The extension rod has an adjusting threaded groove formed on its outer top, and the hexagonal block is fitted onto the outside of the extension rod and threadedly connected to the adjusting threaded groove.

[0012] The hexagonal block is fixed to the outside of the adjusting sleeve, and the mounting thread groove is formed on the outside of the adjusting sleeve and located below the hexagonal block;

[0013] The adjusting sleeve is threaded into the screw hole at the position to be measured via a mounting thread groove. The adjusting sleeve is adjusted along the outer wall of the extension rod to achieve adjustment of the installation depth of the tuning fork.

[0014] As a further improvement of this utility model: the anti-loosening unit includes a positioning ring groove, an outer sleeve, a side-inverted U-shaped piece, and a positioning block;

[0015] The outer sleeve is fixed to the bottom of the junction box body and sleeved on the outside of the adjusting sleeve; the positioning ring groove is formed on the outside of the adjusting sleeve and distributed above the hexagonal block.

[0016] One end of the inverted U-shaped piece is fixed to the bottom outer side of the outer sleeve, and the positioning block is fixed to the other end of the inverted U-shaped piece. The positioning block is distributed below the outer sleeve and engages with the inner side of the positioning ring groove to lock the movement of the adjusting sleeve.

[0017] As a further improvement of this utility model: multiple positioning ring grooves are evenly arranged vertically along the outer side of the adjusting sleeve, and two sets of side-inverted U-shaped pieces and positioning blocks are symmetrically arranged with the outer sleeve as the center.

[0018] As a further embodiment of this utility model: an inclined spring is formed on one of the folded edges of the side-inverted U-shaped piece near the outer sleeve, the inclined spring is distributed at an acute angle with the side-inverted U-shaped piece and one end of the inclined spring is attached to the outside of the outer sleeve.

[0019] As a further improvement of this utility model: the sealing unit includes a vertical circular groove, a mounting ring groove, and a sealing ring;

[0020] The vertical circular groove is formed inside the adjusting sleeve and extends to the bottom of the adjusting sleeve; the mounting ring groove is formed inside the vertical circular groove near the bottom.

[0021] The sealing ring is fitted inside the mounting ring groove and the vertical circular groove, and the inner side of the sealing ring is tightly fitted to the outer wall of the extension rod.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] By setting up the installation components, when the liquid level switch is installed vertically, the installation depth of the tuning fork can be adjusted by adjusting the position of the sleeve relative to the extension rod. This can adapt to the measurement needs of monitoring points at different heights, making the equipment more versatile and easier to use. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a structural cross-sectional view of the mounting component of this utility model;

[0026] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle;

[0027] Figure 4 This is a schematic diagram showing the disassembled installation components and liquid level switch of this utility model;

[0028] Figure 5 This is a sectional view of some parts of the mounting component of this utility model.

[0029] In the diagram: 1. Liquid level switch; 101. Junction box body; 102. Extension rod; 103. Tuning fork; 104. Adjusting threaded groove; 2. Mounting assembly; 201. Adjusting sleeve; 202. Hexagonal block; 203. Mounting threaded groove; 204. Positioning ring groove; 205. Vertical circular groove; 206. Mounting ring groove; 207. Sealing ring; 208. Outer sleeve; 209. Side-inclined U-shaped piece; 210. Positioning block; 211. Tilt spring. Detailed Implementation

[0030] 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.

[0031] Please see Figures 1-5 In this embodiment of the present invention, a portable tuning fork level switch includes a level switch 1 consisting of a junction box body 101, an extension rod 102, and a tuning fork 103. The extension rod 102 is fixed to the bottom end of the junction box body 101. The tuning fork 103 is installed at the bottom end of the extension rod 102 and passes through the extension rod 102 and extends into the junction box body 101. The top end of the tuning fork 103 is electrically connected to the drive circuit inside the junction box body 101 through a piezoelectric piece. An installation component 2 is provided on the outside of the extension rod 102. The installation component 2 is used to adjust the installation depth of the tuning fork 103.

[0032] Mounting component 2 includes an adjustable connection unit, an anti-loosening unit, and a sealing unit;

[0033] The adjustable connection unit is used to connect with the screw hole at the position to be measured. The installation depth of the tuning fork 103 can be adjusted by moving the adjustable connection unit along the outer wall of the extension rod 102.

[0034] The anti-loosening unit is used to provide locking operation for the adjustable connection unit;

[0035] The sealing unit is used to provide a sealing operation between the adjustable connection unit and the outer wall of the extension rod 102;

[0036] The adjustable connection unit includes an adjusting sleeve 201, a hexagonal block 202, and a mounting threaded groove 203;

[0037] An adjusting threaded groove 104 is formed on the top of the outer side of the extension rod 102, and a hexagonal block 202 is sleeved on the outer side of the extension rod 102 and threadedly connected to the adjusting threaded groove 104.

[0038] The hexagonal block 202 is fixed to the outside of the adjusting sleeve 201, and the mounting threaded groove 203 is formed on the outside of the adjusting sleeve 201 and located below the hexagonal block 202;

[0039] The adjusting sleeve 201 is threaded into the screw hole at the position to be measured through the mounting thread groove 203. The adjusting sleeve 201 is adjusted along the outer wall of the extension rod 102 to adjust the installation depth of the tuning fork 103.

[0040] The anti-loosening unit includes a positioning ring groove 204, an outer sleeve 208, a side-tilting U-shaped piece 209, and a positioning block 210;

[0041] The outer sleeve 208 is fixed to the bottom of the junction box body 101 and sleeved on the outside of the adjusting sleeve 201. The positioning ring groove 204 is formed on the outside of the adjusting sleeve 201 and distributed above the hexagonal block 202.

[0042] One end of the side-inverted U-shaped piece 209 is fixed to the bottom of the outer side of the outer sleeve 208, and the positioning block 210 is fixed to the other end of the side-inverted U-shaped piece 209. The positioning block 210 is distributed below the outer sleeve 208 and is engaged with the inner side of the positioning ring groove 204 to lock the movement of the adjusting sleeve 201.

[0043] Multiple positioning ring grooves 204 are evenly arranged vertically along the outer side of the adjusting sleeve 201, and two sets of side-inverted U-shaped pieces 209 and positioning blocks 210 are symmetrically arranged with the outer sleeve 208 as the center.

[0044] In this embodiment, it should be noted that a threaded cylinder is pre-installed at the installation position of the level switch 1, and the threaded cylinder is in communication with the inner cavity of the chamber to be tested.

[0045] When the level switch 1 is installed vertically, the relative position of the mounting component 2 and the extension rod 102 can be adjusted according to the height requirements of the monitoring point, so that the installation height of the tuning fork 103 matches the height of the monitoring point. The operation steps are as follows:

[0046] First, manually pinch the rear end of the side-inverted U-shaped piece 209 to rotate the side-inverted U-shaped piece 209 around the front end (i.e., the end connected to the outer sleeve 208). This will cause the other end of the side-inverted U-shaped piece 209 to lift up (it should be noted that the rear end of the side-inverted U-shaped piece 209 has strong resistance to deformation, so pressing the rear end will not cause deformation in this part, but will rotate around the front end). This will also cause the positioning block 210 to lift up, separating the positioning block 210 from the positioning ring groove 204, thereby releasing the lock on the adjusting sleeve 201.

[0047] At this point, a tool (e.g., a wrench) can be used to rotate the hexagonal block 202. The hexagonal block 202 and the adjusting sleeve 201 rotate as a whole. At this time, the rotating adjusting sleeve 201 moves along the outer wall of the extension rod 102 with the cooperation of the adjusting thread groove 104. When the adjusting sleeve 201 moves to the appropriate position, the pressure on the rear end of the side U-shaped piece 209 is released, and the side U-shaped piece 209 returns to its initial state and the positioning block 210 is engaged with the inner side of a positioning ring groove 204. This achieves the limiting and locking of the adjusting sleeve 201, thereby ensuring the fixation of the relative position of the adjusting sleeve 201 and the extension rod 102. (It should be noted that there is sufficient friction between the adjusting sleeve 201 and the adjusting thread groove 104 to ensure the fixed position of the adjusting sleeve 201. The engagement of the positioning block 210 with the positioning ring groove 204 is used to further assist in improving the positional stability of the adjusting sleeve 201.)

[0048] Then, the tuning fork 103 can be aligned with the threaded cylinder and inserted into the test chamber. Finally, the adjusting sleeve 201 is tightened by threading the screw to the inner wall of the threaded cylinder through the mounting thread groove 203. At this point, the installation and fixing of the liquid switch 1 is completed. Through the cooperation of the above parts, the installation depth of the tuning fork 103 can be adjusted according to the requirements of the liquid switch 1, making the equipment more versatile and easier to use.

[0049] It should also be noted that when the level switch 1 is installed horizontally, the relative rotation adjustment of the adjusting sleeve 201 and the extension rod 102 can also achieve the effect of adjusting the direction of the tuning fork 103. That is, when the level switch 1 is installed horizontally, when the adjusting sleeve 201 is tightened with the threaded cylinder, the two tuning forks 103 remain horizontally distributed, thus meeting the requirements for the horizontal installation of the level switch 1 (i.e., avoiding the tilting of the tuning fork 103, which would cause material residue on the surface of the tuning fork 103 and lead to measurement errors).

[0050] Please refer to this carefully. Figures 1-3 An inclined spring piece 211 is formed on one of the folded edges of the side-inverted U-shaped piece 209 near the outer sleeve 208. The inclined spring piece 211 is distributed at an acute angle with the side-inverted U-shaped piece 209, and one end of the inclined spring piece 211 is attached to the outside of the outer sleeve 208.

[0051] In this embodiment: when the rear end of the side-inverted U-shaped piece 209 is pressed, the inclined spring piece 211 is simultaneously deformed by force, thereby providing elastic force for the side-inverted U-shaped piece 209 to reset, ensuring the stable reset of the side-inverted U-shaped piece 209, and continuously providing a thrust to the rear end of the side-inverted U-shaped piece 209, thereby ensuring the engagement stability of the positioning block 210 and the positioning ring groove 204.

[0052] Please refer to this carefully. Figures 1-4 The sealing unit includes a vertical circular groove 205, an mounting ring groove 206, and a sealing ring 207;

[0053] A vertical circular groove 205 is formed inside the adjusting sleeve 201 and extends to the bottom of the adjusting sleeve 201. An installation ring groove 206 is formed inside the vertical circular groove 205 near the bottom.

[0054] The sealing ring 207 is fitted inside the mounting ring groove 206 and the vertical circular groove 205, and the inner side of the sealing ring 207 is tightly fitted to the outer wall of the extension rod 102.

[0055] In this embodiment: the sealing ring 207 can maintain a good seal between the adjusting sleeve 201 and the extension rod 102. When the adjusting sleeve 201 moves, the moving area of ​​the sealing ring 207 is located below the adjusting thread groove 104. The sealing ring 207 will not interfere with the adjusting thread groove 104, thereby ensuring the sealing of the liquid level switch 1 installation.

[0056] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A portable tuning fork level switch, comprising a level switch (1) consisting of a junction box body (101), an extension rod (102), and a tuning fork (103), wherein the extension rod (102) is fixed to the bottom end of the junction box body (101), the tuning fork (103) is mounted on the bottom end of the extension rod (102) and extends through the extension rod (102) into the interior of the junction box body (101), and the top end of the tuning fork (103) is electrically connected to a drive circuit inside the junction box body (101) via a piezoelectric element, characterized in that, An installation component (2) is provided on the outside of the extension rod (102), and the installation component (2) is used to adjust the installation depth of the tuning fork (103); The installation assembly (2) includes an adjustable connection unit, an anti-loosening unit, and a sealing unit; The adjustable connecting unit is used to connect with the screw hole at the position to be measured. The installation depth of the tuning fork (103) can be adjusted by moving the adjustable connecting unit along the outer wall of the extension rod (102). The anti-loosening unit is used to provide a locking operation for the adjustable connection unit; The sealing unit is used to provide a sealing operation between the adjustable connection unit and the outer wall of the extension rod (102).

2. The portable tuning fork level switch according to claim 1, characterized in that, The adjustable connection unit includes an adjusting sleeve (201), a hexagonal block (202), and a mounting threaded groove (203); The extension rod (102) has an adjusting threaded groove (104) formed on its outer top. The hexagonal block (202) is sleeved on the outside of the extension rod (102) and threadedly connected to the adjusting threaded groove (104). The hexagonal block (202) is fixed to the outside of the adjusting sleeve (201), and the mounting threaded groove (203) is formed on the outside of the adjusting sleeve (201) and located below the hexagonal block (202); The adjusting sleeve (201) is threaded into the screw hole at the position to be measured through the mounting thread groove (203). The adjusting sleeve (201) is adjusted along the outer wall of the extension rod (102) to realize the adjustment of the installation depth of the tuning fork (103).

3. A portable tuning fork level switch according to claim 2, characterized in that, The anti-loosening unit includes a positioning ring groove (204), an outer sleeve (208), a side-inverted U-shaped piece (209), and a positioning block (210). The outer sleeve (208) is fixed to the bottom of the junction box body (101) and sleeved on the outside of the adjusting sleeve (201). The positioning ring groove (204) is formed on the outside of the adjusting sleeve (201) and distributed above the hexagonal block (202). One end of the side-inverted U-shaped piece (209) is fixed to the bottom of the outer side of the outer sleeve (208), and the positioning block (210) is fixed to the other end of the side-inverted U-shaped piece (209). The positioning block (210) is distributed below the outer sleeve (208) and is engaged with the inner side of the positioning ring groove (204) to lock the movement of the adjusting sleeve (201).

4. A portable tuning fork level switch according to claim 3, characterized in that, The positioning ring groove (204) is evenly arranged vertically along the outer side of the adjusting sleeve (201), and the side-inverted U-shaped piece (209) and positioning block (210) are arranged symmetrically in two sets with the outer sleeve (208) as the center.

5. A portable tuning fork level switch according to claim 3, characterized in that, An inclined spring sheet (211) is formed on one of the folded edges of the side-inverted U-shaped piece (209) near the outer sleeve (208). The inclined spring sheet (211) is distributed at an acute angle with the side-inverted U-shaped piece (209), and one end of the inclined spring sheet (211) is attached to the outside of the outer sleeve (208).

6. A portable tuning fork level switch according to claim 2, characterized in that, The sealing unit includes a vertical circular groove (205), an mounting ring groove (206), and a sealing ring (207); The vertical circular groove (205) is opened inside the adjusting sleeve (201) and extends to the bottom of the adjusting sleeve (201). The mounting ring groove (206) is formed inside the vertical circular groove (205) near the bottom. The sealing ring (207) is fitted inside the mounting ring groove (206) and the vertical circular groove (205), and the inner side of the sealing ring (207) is tightly fitted to the outer wall of the extension rod (102).

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