Mechanical liquid level sensing device

Abstract

The utility model provides a mechanical liquid level sensing device which comprises a cylinder body, a piston partition plate is arranged on the inner side face of the cylinder body, and a cylinder body fine adjustment hole is formed in one side of the cylinder body. According to the mechanical liquid level sensing device, the cylinder body, the cylinder body fine adjustment hole, the piston, the connector, the buffer pipe, the fine adjustment screw and other structures are matched with one another, when liquid makes contact with a guide pipe inlet of the device in the using process, the internal piston can automatically sink to block an air hole, and therefore a negative pressure source is cut off, negative pressure is not generated in a container any more, and the liquid level sensing device is safe and reliable. The container does not extract liquid any more, so that the liquid level sensing device has a simpler and more sensitive sensing function, a complex electronic system is not needed to sense whether the liquid is in place or not, follow-up maintenance is facilitated, reliability is improved, and compared with a device for sensing the liquid level in a buoyancy mode in the market, the liquid level sensing device has higher sensitivity and is convenient to use. And the volume can be tiny, so that the installation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level sensing devices, in particular to a mechanical liquid level sensing device. Background Art

[0002] In the related fields of liquid extraction and treatment, liquid level sensing devices are important components to ensure safe and efficient operation.

[0003] There are mainly two traditional liquid level sensing methods. One is an electronic liquid level sensing device, which usually relies on a complex electronic system to detect the liquid level. However, this method has some obvious defects. The complex electronic system not only increases the cost and maintenance difficulty of the device, but also in some harsh environments, electronic components may be interfered, resulting in a decrease in the accuracy and reliability of sensing. The other is a device that senses the liquid level by buoyancy. Although this method has a simple principle, its sensitivity is relatively low. Due to the limitation of its working principle, its volume is often large and it is difficult to be applied to containers with limited space.

[0004] Therefore, it is necessary to provide a mechanical liquid level sensing device to solve the above technical problems. Summary of the Utility Model

[0005] The utility model provides a mechanical liquid level sensing device, which solves the problems that using an electronic liquid level sensing device increases the equipment cost and maintenance difficulty and has low sensing reliability, and that the device using the buoyancy method to sense the liquid level has a large volume, is inconvenient for installation and has poor sensitivity.

[0006] To solve the above technical problems, a mechanical liquid level sensing device provided by the utility model includes:

[0007] A cylinder body, on the inner side of which a piston partition is provided, a cylinder body fine-tuning hole is opened on one side of the cylinder body, and a buffer pipe interface is opened on the front surface of the cylinder body;

[0008] A top cover, which is arranged on the top of the cylinder body;

[0009] A fine-tuning screw, which is threadedly connected to the inner side of the cylinder body fine-tuning hole;

[0010] A buffer pipe, which is wound around the outer side of the cylinder body, and one end of the buffer pipe is fixedly installed on the inner side of the buffer pipe interface;

[0011] An interface, which is arranged at the bottom of the cylinder body;

[0012] A piston, which is arranged inside the cylinder body and on the top of the piston partition.

[0013] Preferably, the inside of the buffer tube interface is in communication with the inside of the cylinder body fine-tuning hole, and one side of the fine-tuning screw is arranged at one end of the buffer tube interface.

[0014] Preferably, a buffer tube clamp is fixedly installed on the other side of the cylinder body, and the buffer tube clamp is arranged on the side of the buffer tube.

[0015] Preferably, a lid ventilation hole is provided at the top of the top cover.

[0016] Preferably, an external thread ring is fixedly installed at the bottom of the cylinder body, and a limiting member is threadedly connected to the outer side surface of the external thread ring.

[0017] Preferably, a retaining ring is fixedly installed on the outer side surface of the interface, and the retaining ring is arranged at the bottom of the inner side surface of the limiting member.

[0018] Preferably, anti-slip grooves are provided on the outer side surface of the limiting member.

[0019] Compared with the related art, a mechanical liquid level sensing device provided by the present invention has the following beneficial effects:

[0020] The present invention provides a mechanical liquid level sensing device. Through the cooperation of structures such as a cylinder body, a cylinder body fine-tuning hole, a piston, an interface, a buffer tube, and a fine-tuning screw, when in use, when the liquid contacts the conduit inlet of the device, the internal piston will automatically sink, blocking the air hole, thereby cutting off the negative pressure source, so that no negative pressure is generated in the container, and the container no longer extracts liquid. In this way, the liquid level sensing device has a simpler and more sensitive sensing function, without the need to sense whether the liquid is in place through a complex electronic system, which is convenient for subsequent maintenance, increases reliability, and compared with the devices on the market that sense the liquid level by buoyancy, it has higher sensitivity and can be made small in size, facilitating installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a first embodiment of a mechanical liquid level sensing device provided by the present invention;

[0022] Figure 2 is Figure 1 the schematic structural diagram of the cylinder body shown;

[0023] Figure 3 is Figure 1 the schematic cross-sectional structural diagram shown;

[0024] Figure 4 is Figure 1 the schematic structural diagram during work shown;

[0025] Figure 5Schematic diagram of the structure of the second embodiment of a mechanical liquid level sensing device provided by the present utility model.

[0026] Reference numerals in the figure: 1, cylinder block; 11, cylinder block fine-tuning hole; 12, piston partition; 13, buffer pipe interface; 14, buffer pipe clamp; 2, top cover; 21, cover ventilation hole; 3, fine-tuning screw; 4, buffer pipe; 5, interface; 6, piston; 7, external thread ring; 71, limiting member; 72, anti-slip groove; 73, retaining ring. Detailed implementation manners

[0027] The present utility model will be further described below in conjunction with the accompanying drawings and implementation manners.

[0028] First embodiment

[0029] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , wherein Figure 1 is a schematic diagram of the structure of the first embodiment of a mechanical liquid level sensing device provided by the present utility model; Figure 2 is Figure 1 the schematic diagram of the cylinder block structure shown in; Figure 3 is Figure 1 the schematic sectional structure diagram shown in; Figure 4 is Figure 1 the schematic diagram of the structure during operation shown in. A mechanical liquid level sensing device includes: a cylinder block 1, on the inner side surface of the cylinder block 1 there is provided a piston partition 12, on one side of the cylinder block 1 there is opened a cylinder block fine-tuning hole 11, and on the front surface of the cylinder block 1 there is opened a buffer pipe interface 13;

[0030] a top cover 2, the top cover 2 is arranged on the top of the cylinder block 1;

[0031] a fine-tuning screw 3, the fine-tuning screw 3 is threadedly connected to the inner side surface of the cylinder block fine-tuning hole 11;

[0032] a buffer pipe 4, the buffer pipe 4 is wound around the outer side surface of the cylinder block 1, and one end of the buffer pipe 4 is fixedly installed on the inner side surface of the buffer pipe interface 13;

[0033] an interface 5, the interface 5 is arranged at the bottom of the cylinder block 1;

[0034] a piston 6, the piston 6 is arranged inside the cylinder block 1 and is located on the top of the piston partition 12.

[0035] The inside of the buffer pipe interface 13 is in communication with the inside of the cylinder block fine-tuning hole 11, and one side of the fine-tuning screw 3 is arranged at one end of the buffer pipe interface 13.

[0036] On the other side of the cylinder block 1, a buffer pipe clamp plate 14 is fixedly installed, and the buffer pipe clamp plate 14 is arranged on the side of the buffer pipe 4.

[0037] On the top of the top cover 2, a cover ventilation hole 21 is opened.

[0038] A cylinder block fine-tuning hole 11 for adjusting the size of the air extraction hole, thereby finely adjusting the instantaneous negative pressure value in the cylinder block 1; a piston partition plate 12 for preventing the piston 6 from separating from the cylinder block 1; the buffer pipe 4 is communicated with the cylinder block fine-tuning hole 11; the cover ventilation hole 21 is much larger than the cylinder block fine-tuning hole 11 to facilitate the formation of a negative pressure difference with the cylinder block fine-tuning hole 11;

[0039] As Figure 4 shown, when this liquid level sensing device is in use, it is installed on the top of the container, and the liquid enters from the bottom of the container.

[0040] The working principle of a mechanical liquid level sensing device provided by the present invention is as follows:

[0041] When in use, because the hole of the cover ventilation hole 21 is much larger than the hole of the cylinder block fine-tuning hole 11, when the interface 5 extracts air, the negative pressure suction force in the cylinder block 1 below the piston 6 will be much stronger than that above the piston 6 in the cover ventilation hole 21. However, due to the large static friction force between the piston 6 and the cylinder block 1, the piston 6 still remains at the top. Since the cylinder block fine-tuning hole 11 is below the piston 6 at this time, the cylinder block 1 together with the cylinder block fine-tuning hole 11, and the cylinder block fine-tuning hole 11 together with the buffer pipe 4, so the buffer pipe 4 will extract air externally;

[0042] When the pipe orifice of the buffer pipe 4 is blocked by liquid (when a small part of the liquid comes into contact with the liquid and also enters the buffer pipe 4), the internal air of the buffer pipe 4 will be instantly exhausted. At this time, the negative pressure value in the cylinder block 1 below the piston 6 rises sharply to exceed the static friction force of the piston 6, and the piston 6 is sucked down to block the air extraction hole. At this time, the vacuum pump can no longer extract air through the buffer pipe 4, and thus stops continuing to extract the air in the container. The air pressure value in the container is balanced with the external air pressure value, and the liquid is no longer sucked into the container;

[0043] The size of the cylinder block fine-tuning hole 11 can be adjusted by the fine-tuning screw 3, thereby controlling the sensitivity of this device to adapt to different liquids;

[0044] To open the device again, it is necessary to switch the external vacuum pump interface 5 to the blowing mode and blow air into the cylinder block 1. When the pressure value in the cylinder block 1 exceeds the static friction force of the piston 6, the piston 6 returns to the top again and can work normally again.

[0045] Compared with the related technology, a mechanical liquid level sensing device provided by the present invention has the following beneficial effects:

[0046] Through the cooperation of structures such as cylinder block 1, cylinder block fine-tuning hole 11, piston 6, interface 5, buffer tube 4 and fine-tuning screw 3, during use, when the liquid contacts the conduit inlet of the device, the internal piston 6 will automatically sink, blocking the air hole, thus cutting off the negative pressure source, preventing the generation of negative pressure in the container and the container from sucking liquid anymore. In this way, the liquid level sensing device has a more concise and sensitive sensing function, without the need for a complex electronic system to sense whether the liquid is in place, facilitating subsequent maintenance, increasing reliability, and compared with the devices on the market that sense the liquid level through buoyancy, it has higher sensitivity and can be made small in size, facilitating installation.

[0047] Second Embodiment

[0048] Please refer to Figure 5 , based on a mechanical liquid level sensing device provided in the first embodiment of the present application, the second embodiment of the present application proposes another mechanical liquid level sensing device. The second embodiment is only a preferred manner of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0049] Specifically, the difference of a mechanical liquid level sensing device provided in the second embodiment of the present application is that, for a mechanical liquid level sensing device, an external thread ring 7 is fixedly installed at the bottom of the cylinder block 1, and a limiting member 71 is threadedly connected to the outer side surface of the external thread ring 7.

[0050] A retaining ring 73 is fixedly installed on the outer side surface of the interface 5, and the retaining ring 73 is arranged at the bottom of the inner side surface of the limiting member 71.

[0051] Anti-slip grooves 72 are formed on the outer side surface of the limiting member 71.

[0052] The working principle of a mechanical liquid level sensing device provided by the present utility model is as follows:

[0053] When in use and it is necessary to replace the interface 5, the user can rotate the limiting member 71 to threadedly connect the limiting member 71 on the outer side surface of the external thread ring 7 until the limiting member 71 is threadedly disconnected from the outer side surface of the external thread ring 7. Then, the limiting member 71 is moved downward from the bottom of the retaining ring 73. Then, the user can disassemble the interface 5, insert a new interface 5 into the bottom of the cylinder block 1, then sleeve the limiting member 71 on the outer side surface of the interface, and make the bottom of the inner side surface of the limiting member 71 abut against the bottom of the retaining ring 73. Then, the limiting member 71 is threadedly connected to the outer side surface of the external thread ring 7, thereby being able to limit and install the interface 5.

[0054] Compared with the related art, a mechanical liquid level sensing device provided by the present utility model has the following beneficial effects:

[0055] Through the cooperation of structures such as the external thread ring 7, the limiting member 71, the anti-slip groove 72 and the retaining ring 73, when in use, the user only needs to rotate the limiting member 71 to make the limiting member 7 fall off from the top of the external thread ring 7, and then the interface 5 can be disassembled and replaced, and the operation is convenient and fast.

[0056] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A mechanical liquid level sensing device, characterized in that, Comprising: A cylinder block, on the inner side of which a piston partition is provided, on one side of which a cylinder block fine-tuning hole is opened, and on the front side of which a buffer tube interface is opened; A top cover, which is arranged on the top of the cylinder block; A fine-tuning screw, which is threadedly connected to the inner side of the cylinder block fine-tuning hole; A buffer tube, which is wound around the outer side of the cylinder block, and one end of which is fixedly installed on the inner side of the buffer tube interface; An interface, which is arranged at the bottom of the cylinder block; A piston, which is arranged inside the cylinder block and on the top of the piston partition.

2. The mechanical liquid level sensing device according to claim 1, wherein, The inside of the buffer tube interface is in communication with the inside of the cylinder block fine-tuning hole, and one side of the fine-tuning screw is arranged at one end of the buffer tube interface.

3. A mechanical liquid level sensing device according to claim 2, characterized in that, On the other side of the cylinder block, a buffer tube clamping plate is fixedly installed, and the buffer tube clamping plate is arranged on the side of the buffer tube.

4. A mechanical liquid level sensing device according to claim 3, characterized in that, On the top of the top cover, a lid ventilation hole is opened.

5. A mechanical liquid level sensing device according to claim 1, characterized in that, At the bottom of the cylinder block, an external thread ring is fixedly installed, and a limiting member is threadedly connected to the outer side of the external thread ring.

6. A mechanical liquid level sensing device according to claim 5, characterized in that, On the outer side of the interface, a retaining ring is fixedly installed, and the retaining ring is arranged at the bottom of the inner side of the limiting member.

7. A mechanical liquid level sensing device according to claim 6, characterized in that, On the outer side of the limiting member, an anti-slip groove is opened.

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