Electric contact liquid level meter

Abstract

The utility model relates to the technical field of liquid level measuring instruments, and particularly discloses an electric contact liquid level meter which comprises a measuring cylinder, an electrode holder, a pressing cap and an electrode, the electrode holder is arranged on the outer wall of the measuring cylinder, the electrode is arranged in the electrode holder, and the pressing cap is in threaded connection with the end, away from the measuring cylinder, of the electrode holder. The pressing cap is used for abutting against the end of the electrode, the outer side of the electrode base is sleeved with a sealing ring, one side of the sealing ring abuts against the pressing cap, and an abutting assembly used for pressing the sealing ring is arranged on the electrode base. The possibility of rusting of the threaded section between the pressing cap and the electrode holder can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of liquid level measuring instruments, and in particular to an electric contact liquid level meter. Background Art

[0002] The electric contact level gauge is a liquid level measuring instrument. It uses the principle of a communicating vessel to reflect the external water level into the measuring tube. It uses the difference in the electrical conductivity of the electrodes installed in the measuring tube to the steam and water to light up different red and green lights to display the water level. In the boiler system, an electric contact level gauge is usually installed to monitor the changes in the water level in the boiler to ensure that the water level in the boiler is always kept within a safe range.

[0003] The electric contact liquid level gauge includes a measuring tube, an electrode seat, an electrode and a pressure cap; there are multiple electrode seats, which are arranged on the outer wall of the measuring tube, and the electrode seats are connected to the inside of the measuring tube; each electrode seat is penetrated by an electrode, one end of the electrode is located in the measuring tube, and the other end of the electrode is located outside the measuring tube; the pressure cap is arranged at the end of the electrode located outside the measuring tube, and the end of the pressure cap and the electrode seat are threadedly connected.

[0004] When measuring the water level, the measuring tube needs to be installed in the boiler, so the outer end of the electrode and the pressure cap are often immersed in water. The threaded section between the pressure cap and the electrode holder is immersed in water for a long time, which is easy to cause rust. When the electrode is subsequently removed for replacement and maintenance, it is not conducive to removing the pressure cap, affecting the maintenance process. Utility Model Content

[0005] In order to reduce the possibility of rust on the threaded section between the pressure cap and the electrode holder, the present application provides an electric contact liquid level gauge.

[0006] The electric contact liquid level meter provided in this application adopts the following technical solution:

[0007] An electric contact liquid level gauge comprises a measuring tube, an electrode seat, a pressure cap and an electrode, wherein the electrode seat is arranged on the outer wall of the measuring tube, the electrode is arranged in the electrode seat, the pressure cap is threadedly connected to an end of the electrode seat away from the measuring tube, the pressure cap is used to press against the end of the electrode, a sealing ring is sleeved on the outer side of the electrode seat, one side of the sealing ring is pressed against the pressure cap, and a pressing component for pressing the sealing ring is arranged on the electrode seat.

[0008] By adopting the above technical solution, the pressing assembly presses the sealing ring against the connection gap between the pressure cap and the electrode holder, thereby reducing the moisture and steam that penetrates through this gap, thereby enhancing the sealing effect of the connection, reducing the possibility of rusting of the threaded section, and facilitating the subsequent removal of the pressure cap.

[0009] Optionally, the pressing assembly includes a pressing ring and a clamping piece, the pressing ring is movably sleeved on the outer side of the electrode seat, the pressing ring is provided with a receiving groove for accommodating a sealing ring, the clamping piece is arranged on a side of the pressing ring close to the pressing cap, and the pressure cap is provided with a clamping groove adapted to the clamping piece on a side of the pressing ring close to the pressing ring.

[0010] By adopting the above technical solution, the pressure ring is moved to the side close to the pressure cap so that the clamping piece slides into the clamping groove, and the pressure ring can be fixed. At this time, the sealing ring is squeezed between the pressure cap and the pressure ring, so the squeezing operation of the sealing ring is relatively simple.

[0011] Optionally, the clamping part includes a connecting block arranged on the pressure ring and a clamping block arranged on the connecting block, and the clamping groove includes a sliding groove and a limiting groove arranged on the pressure cap, the limiting groove and the sliding groove are communicated, the sliding groove is for the connecting block and the clamping block to slide into, the limiting groove is for the clamping block to be clamped in, and a blocking block is detachably arranged in the sliding groove, and when the clamping block is located in the limiting groove, the blocking block is located in the sliding groove, and the blocking block and the connecting block are tightly pressed against each other.

[0012] By adopting the above technical scheme, during the movement of the pressure ring, the connecting block and the clamping block first slide into the slide groove. When the clamping block abuts against the bottom wall of the slide groove, the pressure ring is rotated, and the pressure ring drives the connecting block and the clamping block to rotate, so that the clamping block slides into the limiting groove. At this time, the blocking block is inserted into the slide groove, and the two sides of the blocking block are respectively pressed against the inner wall of the slide groove and the connecting block; the blocking block can limit the rotation of the pressure ring, and the cooperation of the limiting groove and the clamping block can limit the sliding of the pressure ring, thereby fixing the pressure ring.

[0013] Optionally, the pressure ring includes a mounting ring and an abutment ring, the mounting ring is movably sleeved on the outer wall of the electrode seat, the abutment ring is located on a side of the mounting ring close to the pressure cap, the accommodating groove is arranged on the abutment ring, and the abutment ring is rotatably arranged on the mounting ring.

[0014] By adopting the above technical solution, during the process of squeezing the sealing ring, the pressure ring will rotate. Since the pressure ring includes a mounting ring and an abutment ring that are rotatably connected, it is not easy for the abutment ring to rotate when the mounting ring rotates, making it difficult for the abutment ring to drive the sealing ring to rotate, thereby helping to enhance the sealing effect after the sealing ring is installed.

[0015] Optionally, an elastic pad is provided on the side wall of the block.

[0016] By adopting the above technical solution, after the block is inserted, the elastic pads on the two side walls of the block are respectively pressed against the inner wall of the slide groove and the side wall of the connecting block, thereby increasing the friction on the block and making it difficult for the block to slide out, thereby ensuring the limiting effect of the block on the pressure ring.

[0017] Optionally, a steel wire is passed through the blocking block, and the steel wire is used to fix the blocking block on the pressure cap.

[0018] By adopting the above technical solution, the steel wire binds the block to the outside of the pressure cap, which can limit the sliding of the block, thereby further enhancing the stability of the pressure ring after installation.

[0019] Optionally, a first conical surface is formed at one end of the electrode holder away from the measuring tube, and a second conical surface for fitting with the first conical surface is provided on the electrode.

[0020] By adopting the above technical solution, after the electrode is installed, the first conical surface and the second conical surface fit together to form a conical sealing surface. Since the abutment area of ​​the conical seal is larger than the abutment area of ​​the flat seal, the sealing effect is better, which helps to reduce the possibility of water or gas leakage, thereby ensuring the accuracy of the measurement results.

[0021] Optionally, a plurality of grooves are formed on the first conical surface, and sealing rings are arranged in the grooves, and the sealing rings abut against the second conical surface.

[0022] By adopting the above technical solution, the sealing ring can better fill the gap between the first cone surface and the second cone surface due to its elasticity, which helps to enhance the sealing effect; when multiple sealing rings are provided, after one of the sealing rings is damaged, the remaining sealing rings can still play a sealing role, which helps to reduce the probability of sealing failure.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. A sealing ring is provided on one side of the installation gap between the pressure cap and the electrode holder, and a pressing assembly is provided on the outer side of the sealing ring. The pressing assembly presses the sealing ring tightly, thereby enhancing the sealing of the connection, reducing the possibility of rust on the threaded section, and facilitating the smooth removal of the subsequent pressure cap.

[0025] 2. Slide the pressure ring and rotate it to make the block slide into the limit groove, and then insert the block into the slide groove to complete the extrusion of the sealing ring, so the installation process is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0027] Figure 2 is a cross-sectional view of the pressure cap in the embodiment of the present application;

[0028] Figure 3 It is an exploded schematic diagram of the embodiment of the present application for illustrating the matching relationship between the card connector and the card slot;

[0029] Figure 4 yes Figure 1 A magnified schematic diagram of center A.

[0030] Figure numerals: 1. measuring tube; 2. electrode seat; 21. first conical surface; 22. groove; 3. pressure cap; 31. card slot; 311. slide slot; 312. limit slot; 32. perforation; 321. mounting slot; 4. electrode; 41. second conical surface; 42. terminal; 5. sealing ring; 6. pressing assembly; 61. pressing ring; 611. mounting ring; 6111. rotating groove; 612. abutting ring; 6121. accommodating groove; 6122. limit plate; 62. snap-fit ​​piece; 621. connecting block; 622. card block; 63. blocking block; 7. elastic pad; 8. mounting seat; 9. steel wire; 10. sealing ring; 11. rubber ring. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] The present application embodiment discloses an electric contact liquid level meter. Figure 1 and Figure 2 The electric contact level gauge includes a measuring tube 1 and an electrode holder 2. The measuring tube 1 is in the shape of a hollow cylinder; there are a plurality of electrode holders 2, which are evenly spaced along the axial direction of the measuring tube 1; the electrode holder 2 is in the shape of a hollow cylinder, and the axis of the electrode holder 2 is arranged along the radial direction of the measuring tube 1; the electrode holder 2 is welded to the outer wall of the measuring tube 1, and the electrode holder 2 is connected to the inside of the measuring tube 1. An electrode 4 is inserted in each electrode holder 2, one end of the electrode 4 is located in the measuring tube 1, and the other end of the electrode 4 is located outside the measuring tube 1. A pressure cap 3 for fixing the electrode 4 on the electrode holder 2 is provided at the end of the electrode holder 2 away from the measuring tube 1. When measuring, the measuring tube 1 is fixedly installed on the boiler, and the bottom end of the measuring tube 1 is located in the area to be measured in the boiler, so that the water level in the boiler can be measured.

[0033] Reference Figure 2 The end of the electrode holder 2 away from the measuring tube 1 is provided with an external thread, and correspondingly, the inner wall of the pressure cap 3 is provided with an internal thread, so that the pressure cap 3 is threadedly connected to the end of the electrode holder 2; the pressure cap 3 is also provided with a through hole 32 for the end of the electrode 4 to pass through, and one end of the electrode 4 passing through the through hole 32 is fixedly connected to the terminal 42. Therefore, by tightening the pressure cap 3, one end of the pressure cap 3 can be pressed against the electrode 4, so that the electrode 4 is fixedly installed on the electrode holder 2.

[0034] A sealing ring 5 is sleeved on the outer wall of the electrode holder 2, the inner wall of the sealing ring 5 abuts against the outer wall of the electrode holder 2, and the outer diameter of the sealing ring 5 is smaller than the outer diameter of the pressing cap 3; a pressing component 6 is also provided on the outer side of the electrode holder 2, and the pressing component 6 can press the sealing ring 5 tightly, thereby improving the sealing effect between the pressing cap 3 and the electrode holder 2, making it difficult for moisture to enter and the threaded section difficult to rust.

[0035] Reference Figure 2 and Figure 3The pressing assembly 6 includes a pressing ring 61 and a clamping member 62. The pressing ring 61 is slidably arranged on the outer wall of the electrode holder 2 along the axial direction of the electrode holder 2, and the pressing ring 61 can rotate around the axis of the electrode holder 2; the pressing ring 61 is located between the pressing cap 3 and the measuring tube 1, and a ring-shaped receiving groove 6121 is provided on the side of the pressing ring 61 close to the pressing cap 3, and the receiving groove 6121 is used to accommodate the sealing ring 5. When the sealing ring 5 is completely located in the receiving groove 6121, the sealing ring 5 is in a squeezed state. The clamping member 62 is arranged on the side of the pressing ring 61 close to the pressing cap 3, and two clamping members 62 are arranged; the clamping member 62 includes a connecting block 621 and a clamping block 622. The connecting block 621 is fixedly connected to the pressing ring 61, and the length direction of the connecting block 621 is arranged along the axial direction of the electrode holder 2; the clamping block 622 is fixedly connected to the end of the connecting block 621 away from the pressing ring 61, and the connecting block 621 and the clamping block 622 together form an L-shaped clamping member 62.

[0036] Correspondingly, a clamping groove 31 is provided on one side of the pressure cap 3 close to the pressure ring 61, and two clamping grooves 31 are provided, and correspond to two clamping parts 62 respectively. The clamping groove 31 includes a slide groove 311 and a limit groove 312 provided on the pressure cap 3. The slide groove 311 is located at one end of the pressure cap 3 close to the measuring tube 1, and the slide groove 311 is arranged along the axial direction of the electrode holder 2; the width of the slide groove 311 is not less than the sum of the widths of the connecting block 621 and the clamping block 622, so that the connecting block 621 and the clamping block 622 can slide into the slide groove 311. The limiting groove 312 is located at one end of the slide groove 311 away from the measuring tube 1, and the limiting groove 312 is connected to the slide groove 311; after the connecting block 621 and the clamping block 622 are slid to abut against the bottom wall of the slide groove 311, the pressure ring 61 is rotated, and the pressure ring 61 drives the connecting block 621 and the clamping block 622 to rotate, so that the clamping block 622 slides into the limiting groove 312. At this time, the limiting groove 312 can limit the sliding of the clamping block 622, thereby limiting the sliding of the pressure ring 61.

[0037] Reference Figure 3 and Figure 4 The pressing assembly 6 also includes a block 63, and two block 63 are provided, corresponding to the two slots 31 respectively. The block 63 is slidably arranged in the corresponding slide slot 311 along the radial direction of the electrode holder 2. After the block 622 slides into the limiting slot 312, the block 63 is slid into the slide slot 311, and the block 63 can limit the rotation of the connecting block 621 and the block 622, thereby limiting the rotation of the pressure ring 61. Therefore, the pressure ring 61 can be fixed. When the pressure ring 61 is fixed, the pressure ring 61 squeezes the sealing ring 5 located in the receiving slot 6121, thereby strengthening the sealing of the threaded section.

[0038] Furthermore, elastic pads 7 are bonded to both side walls of the block 63, and the elastic pads 7 are made of rubber. The sum of the width of the block 63 and the thickness of the two elastic pads 7 is slightly larger than the difference between the width of the chute 311 and the width of the connecting block 621, so after the block 63 is inserted into the chute 311, the two elastic pads 7 are in a tightly pressed state, thereby reducing the possibility of the block 63 accidentally sliding out.

[0039] Reference Figure 4 The two blocks 63 are fixedly connected to a mounting seat 8 on the sides away from each other. A steel wire 9 is passed through the mounting seat 8. The two ends of the steel wire 9 pass through the mounting rings 611 on the two blocks 63 and are tied and fixed. Therefore, the steel wire 9 can further limit the movement of the block 63 and improve the stability of the sealing ring 5 after installation.

[0040] Reference Figure 2 In the process of the extrusion assembly extruding the sealing ring 5, the sealing ring 5 needs to be inserted into the receiving groove 6121 of the pressure ring 61 first, and then the pressure ring 61 is slid to the side close to the pressure cap 3 until the ends of the sealing ring 5 and the pressure cap 3 are butted, and then the pressure ring 61 is rotated to lock the pressure ring 61, and then the block 63 is installed to limit the rotation of the pressure ring 61; in this process, the pressure ring 61 first presses the sealing ring 5 tightly, and then when the pressure ring 61 rotates, it is easy to drive one side of the sealing ring 5 to rotate, so that the sealing ring 5 is twisted, affecting the sealing effect. In order to reduce the possibility of the sealing ring 5 being twisted and deformed, the pressure ring 61 includes a mounting ring 611 and an abutting ring 612. The mounting ring 611 is slidably sleeved on the outer wall of the electrode holder 2, and the mounting ring 611 can rotate around the axis of the electrode holder 2; the clamping member 62 is fixedly arranged on the mounting ring 611. The abutting ring 612 is arranged on the side of the mounting ring 611 close to the pressure cap 3, and the receiving groove 6121 is opened on the abutting ring 612. One side of the abutting ring 612 is fixedly connected to a limiting plate 6122. Correspondingly, an annular rotation groove 6111 is provided on the mounting ring 611. The limiting plate 6122 is slidably disposed in the rotation groove 6111, so that the abutting ring 612 is rotatably disposed on the mounting ring 611. Therefore, when the mounting ring 611 rotates, it is not easy to drive the abutting ring 612 to rotate, thereby reducing the possibility of the abutting ring 612 driving the sealing ring 5 to rotate, which helps to ensure the sealing effect of the sealing ring 5.

[0041] In order to further enhance the sealing effect of the threaded section, an annular mounting groove 321 is provided on the wall surface where the through hole 32 is located, and a rubber ring 11 is installed in the mounting groove 321. The inner wall of the rubber ring 11 abuts against the surface of the electrode 4, thereby enhancing the sealing effect of the side of the pressure cap 3 away from the measuring tube 1.

[0042] In addition, the end of the electrode holder 2 away from the measuring tube 1 is provided with a first conical surface 21, which is concave inward; the end of the electrode 4 located in the pressure cap 3 is provided with a second conical surface 41, which is convex outward; the first conical surface 21 and the second conical surface 41 have the same degree of inclination, so after the electrode 4 is installed, the first conical surface 21 and the second conical surface 41 abut against each other, thereby expanding the contact area of ​​the abutting part, which helps to enhance the sealing effect of the connection. Furthermore, two annular grooves 22 are provided on the first conical surface 21, and a sealing ring 10 is provided in each groove 22. The side of the sealing ring 10 away from the groove 22 can abut against the second conical surface 41, thereby further improving the sealing effect of the connection and ensuring the accuracy of the measurement results.

[0043] The implementation principle of the electric contact liquid level gauge of the embodiment of the present application is as follows: first, the sealing ring 5 and the pressure ring 61 are sleeved on the outer wall of the electrode holder 2, and then the electrode 4 is inserted into the electrode holder 2, and the pressure cap 3 is screwed in to fix the electrode 4; then, the sealing ring 5 is slid into the receiving groove 6121 of the pressure ring 61, and then the pressure ring 61 is moved to the side close to the pressure cap 3 until one side of the sealing ring 5 abuts against the pressure cap 3, and at this time, the clamping piece 62 abuts against the bottom wall of the clamping groove 31; then, the mounting ring 611 is rotated When the mounting ring 611 rotates, it drives the clamping part 62 to rotate, so that the clamping block 622 slides into the limiting groove 312; then the blocking block 63 is inserted into the sliding groove 311, and then the steel wire 9 is passed through the mounting seat 8 on the blocking block 63, and the two ends of the steel wire 9 are tied and fixed to complete the installation of the pressing component 6; at this time, the sealing ring 5 is pressed tightly against the connection between the pressure cap 3 and the electrode holder 2, thereby improving the sealing here, reducing the possibility of moisture infiltration, and making the threaded section less likely to rust.

[0044] The above are optional embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electric contact liquid level gauge, comprising a measuring tube (1), an electrode holder (2), a pressure cap (3) and an electrode (4), wherein the electrode holder (2) is arranged on the outer wall of the measuring tube (1), the electrode (4) is arranged in the electrode holder (2), the pressure cap (3) is threadedly connected to an end of the electrode holder (2) away from the measuring tube (1), and the pressure cap (3) is used to press against the end of the electrode (4), characterized in that: A sealing ring (5) is sleeved on the outer side of the electrode seat (2), one side of the sealing ring (5) abuts against the pressing cap (3), and a pressing component (6) for pressing the sealing ring (5) is provided on the electrode seat (2).

2. The electric contact liquid level gauge according to claim 1, characterized in that: The pressing assembly (6) comprises a pressing ring (61) and a clamping member (62); the pressing ring (61) is movably sleeved on the outer side of the electrode holder (2); a receiving groove (6121) for receiving the sealing ring (5) is provided on the pressing ring (61); the clamping member (62) is arranged on a side of the pressing ring (61) close to the pressing cap (3); and a clamping groove (31) adapted to the clamping member (62) is provided on a side of the pressing cap (3) close to the pressing ring (61).

3. The electric contact liquid level gauge according to claim 2, characterized in that: The clamping member (62) comprises a connecting block (621) arranged on the pressure ring (61) and a clamping block (622) arranged on the connecting block (621); the clamping slot (31) comprises a sliding slot (311) and a limiting slot (312) arranged on the pressure cap (3); the limiting slot (312) and the sliding slot (311) are connected; the sliding slot (311) allows the connecting block (621) and the clamping block (622) to slide into; the limiting slot (312) allows the clamping block (622) to be clamped into; a blocking block (63) is detachably arranged in the sliding slot (311); when the clamping block (622) is located in the limiting slot (312), the blocking block (63) is located in the sliding slot (311), and the blocking block (63) and the connecting block (621) are tightly pressed against each other.

4. The electric contact liquid level gauge according to claim 3, characterized in that: The pressure ring (61) comprises a mounting ring (611) and an abutment ring (612); the mounting ring (611) is movably sleeved on the outer wall of the electrode holder (2); the abutment ring (612) is located on a side of the mounting ring (611) close to the pressure cap (3); the accommodating groove (6121) is provided on the abutment ring (612); and the abutment ring (612) is rotatably provided on the mounting ring (611).

5. The electric contact liquid level gauge according to claim 3, characterized in that: An elastic pad (7) is provided on the side wall of the blocking block (63).

6. The electric contact liquid level gauge according to claim 5, characterized in that: A steel wire (9) is passed through the blocking block (63), and the steel wire (9) is used to fix the blocking block (63) on the pressure cap (3).

7. The electric contact liquid level gauge according to claim 1, characterized in that: A first conical surface (21) is formed at one end of the electrode seat (2) away from the measuring tube (1), and a second conical surface (41) for fitting with the first conical surface (21) is provided on the electrode (4).

8. The electric contact liquid level gauge according to claim 7, characterized in that: A plurality of grooves (22) are provided on the first conical surface (21), a sealing ring (10) is arranged in the groove (22), and the sealing ring (10) abuts against the second conical surface (41).

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