Automatic liquid filling device for isolation liquid of differential pressure instrument with pressure guide pipe

Abstract

The utility model discloses a kind of automatic liquid filling devices of guide pressure pipe type differential pressure instrument isolation liquid, including portable power supply, portable self-priming pump, four-way joint and liquid level indicating mechanism, the portable power supply is as the power supply of portable self-priming pump, the liquid inlet of portable self-priming pump is connected isolation liquid container by liquid inlet hose, the liquid outlet of portable self-priming pump is connected the liquid inlet of four-way joint by liquid outlet hose, two liquid outlets of four-way joint are connected to the high, low pressure side blowdown of differential pressure instrument respectively by two branch hoses and are communicated with instrument isolation tank, another liquid outlet of four-way joint connects the liquid level indicating mechanism. The utility model can realize single ground operation, safe and efficient automatic liquid filling, eliminate aerial work risk, improve construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical instrument debugging technology, specifically an automatic filling device for isolation fluid of differential pressure instrument with pressure guide tube, which is suitable for the filling operation of isolation fluid in differential pressure transmitters of refining and chemical plants. Background Technology

[0002] In the petrochemical and other fields, pressure-conducting differential pressure instruments require the filling of a corresponding isolation fluid into the isolation tank to meet measurement requirements due to the properties of the measured process medium. Currently, the traditional filling method involves manually injecting the isolation fluid through the drain port at the top of the isolation tank. This method has the following drawbacks:

[0003] (1) It requires two people to work together, which is time-consuming, labor-intensive, and has high labor costs;

[0004] (2) There are safety risks associated with working at heights;

[0005] (3) The injection efficiency is low and it is impossible to quickly complete the operation of multiple instruments. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic filling device for the isolation fluid of a differential pressure instrument with a pressure guide tube, which can realize automatic filling by a single person on the ground, safely and efficiently, eliminating the risks of high-altitude operations and improving construction efficiency.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: an automatic filling device for isolation fluid of a differential pressure instrument using a pressure guide tube, comprising a mobile power supply, a portable self-priming pump, a four-way connector, and a liquid level indicator mechanism. The mobile power supply serves as the power source for the portable self-priming pump. The inlet of the portable self-priming pump is connected to the isolation fluid container via an inlet hose, and the outlet of the portable self-priming pump is connected to the inlet of the four-way connector via an outlet hose. Two outlets of the four-way connector are respectively connected to the high and low pressure side drain ports of the differential pressure instrument via two branch hoses and are connected to the instrument isolation tank. The other outlet of the four-way connector is connected to the liquid level indicator mechanism.

[0008] As a further preferred embodiment of this solution, the liquid level indicator mechanism consists of a transparent plastic tube and a float. The float is installed inside the transparent plastic tube, and the outer diameter of the float is smaller than the inner diameter of the transparent plastic tube. When the transparent plastic tube is in operation, it is set vertically and its top height is higher than the highest liquid level height of the instrument isolation tank. The filling progress is displayed in real time through the position of the float.

[0009] As a further preferred embodiment of this solution, the portable self-priming pump is a USB self-priming pump with a working voltage of 5VDC and a head of ≥10m.

[0010] As a further preferred embodiment of this solution, the power bank is powered by 5V DC, has a capacity of ≥10000mAh, and features both USB-A and Type-C dual-interface outputs.

[0011] As a further preferred embodiment of this solution, the front end of the inlet hose is equipped with a filter with a counterweight filter head.

[0012] As a further preferred embodiment of this solution, the filter adopts a stainless steel filter screen structure, and the counterweight in the filter is made of 304 stainless steel.

[0013] As a further preferred embodiment of this solution, each of the two branch hoses is equipped with a ball valve, and the ball valve is made of stainless steel with an inner diameter matching the outer diameter of the branch hose.

[0014] As a further preferred embodiment of this solution, the differential pressure instrument is equipped with drain valves at the high and low pressure side drain ports, and the outlets of the two branch hoses are respectively connected to the two drain valves.

[0015] The beneficial effects of this utility model are as follows:

[0016] The automatic liquid filling device of this invention can be operated by a single person on the ground, avoiding the risks of working at heights; it can quickly complete the filling of isolation fluid for multiple instruments, greatly shortening the operation time and improving construction efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the connection structure of this utility model.

[0018] The diagram is labeled as follows: 1-Power bank; 2-USB self-priming pump; 3-Filter; 4-Transparent plastic tube; 5-Four-way connector; 6-Buoy; 7-Instrument drain valve; 8-Isolation tank; 9-Isolation liquid container; 10-Ball valve; 11-Inlet hose; 12-Outlet hose; 13-Branch hose. Detailed Implementation

[0019] 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.

[0020] like Figure 1 As shown, an automatic filling device for isolating fluid in a differential pressure instrument with a pressure guide tube includes:

[0021] Power Bank 1: Provides 5V DC power, preferably with a capacity of ≥10000mAh, and has dual USB-A and / or Type-C output interfaces.

[0022] USB self-priming pump 2: The operating voltage is 5V DC, and the head must be at least 10 meters. When using it, a power bank should provide the operating voltage to the self-priming pump, and the self-priming pump should be placed above the surface of the isolation liquid to avoid immersion in the liquid.

[0023] Filter 3 with a counterweight filter head: Its interface is compatible with the inlet interface of a USB self-priming pump. The filter has a counterweight at the bottom to ensure that it sinks to the bottom of the container holding the isolation fluid and has the function of filtering impurities.

[0024] 4. Transparent plastic tube: Approximately 10 meters in length (can be adjusted according to actual needs). The tube is transparent, making it easy to observe changes in liquid level during the filling process.

[0025] Four-way connector 5: Its inner diameter must be precisely matched with the outer diameter of the transparent plastic hose and the inlet / outlet fluid hose to ensure a reliable seal at the connection.

[0026] Buoy 6: Its outer diameter is smaller than the inner diameter of the transparent plastic hose, and its bright color makes it easy to identify. The buoy floats freely inside the hose as the liquid level changes, providing a visual indication of the liquid level.

[0027] Ball valve 10: Its inner diameter is consistent with the outer diameter of the transparent plastic hose, ensuring smooth connection and good sealing.

[0028] The connection relationships of the above components are as follows:

[0029] At the inlet of the USB self-priming pump 2, a filter 3 with a counterweight filter head is connected via an inlet hose 11, and the filter 3 is submerged at the bottom of the container 9 containing the isolation liquid. At the outlet of the USB self-priming pump 2, an inlet hose 12 is connected to the interface ① of the four-way connector 5.

[0030] The interfaces ③ and ④ of the four-way connector 5 are connected to the instrument drain valve 7 of the differential pressure instrument via two branch hoses 13 and two ball valves 10. Connect a section of transparent plastic tube 4 to interface ② of the four-way connector 5, and insert a float 6 into this section of tube. Fix this section of tube with the float 6 vertically, with its top height slightly higher than the highest liquid level of the instrument isolation tank 8.

[0031] The USB self-priming pump 2 is connected to the power bank 1 using a data cable.

[0032] The automatic liquid filling operation method of this device is as follows:

[0033] (1) Connect the mobile power supply 1 and turn on the switch on the USB self-priming pump 2 to extract the isolation liquid.

[0034] (2) Open the drain valve 7 and ball valve 10. The isolation liquid enters the pressure guide line of the differential pressure instrument from the drain port. Simultaneously, the float (6) in the vertical transparent plastic tube 4 rises with the liquid level.

[0035] (3) Observe the position of buoy 6. When the liquid level in the isolation tank 8 reaches 2 / 3 of the height of the isolation tank, turn off the USB self-priming pump 2 and stop filling.

[0036] (4) Close the drain valve 7 and the ball valve 10, and disconnect the pipeline connection between the ball valve 10 and the drain valve 7.

[0037] (5) Open the ball valve (10) to recover the isolation fluid in the hose into the isolation fluid container 9.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit the scope of protection of this utility model in any way, and all technical solutions obtained by equivalent substitution or other means fall within the scope of protection of this utility model. Parts not covered by this utility model are the same as or can be implemented using existing technology.

Claims

1. An automatic fluid filling device for a differential pressure instrument with a pressure-conducting tube, characterized in that, The device includes a power bank, a portable self-priming pump, a four-way connector, and a liquid level indicator. The power bank serves as the power source for the portable self-priming pump. The inlet of the portable self-priming pump is connected to an isolation liquid container via an inlet hose. The outlet of the portable self-priming pump is connected to the inlet of the four-way connector via an outlet hose. Two outlets of the four-way connector are respectively connected to the high and low pressure side drain ports of the differential pressure instrument via two branch hoses and are connected to the instrument isolation tank. The other outlet of the four-way connector is connected to the liquid level indicator.

2. The automatic filling device for isolation fluid in a pressure-conducting differential pressure instrument according to claim 1, characterized in that, The liquid level indicator consists of a transparent plastic tube and a float. The float is installed inside the transparent plastic tube, and the outer diameter of the float is smaller than the inner diameter of the transparent plastic tube. When the transparent plastic tube is working, it is set vertically and its top height is higher than the highest liquid level height of the instrument isolation tank. The filling progress is displayed in real time by the position of the float.

3. The automatic filling device for isolation fluid in a pressure-conducting differential pressure instrument according to claim 1, characterized in that, The portable self-priming pump is a USB self-priming pump with a working voltage of 5V DC and a head of ≥10m.

4. The automatic filling device for isolation fluid in a pressure-conducting differential pressure instrument according to claim 1 or 3, characterized in that, The power bank is powered by 5V DC, has a capacity of ≥10000mAh, and features both USB-A and Type-C dual-interface outputs.

5. The automatic filling device for isolation fluid in a pressure-conducting differential pressure instrument according to claim 1, characterized in that, The inlet hose is equipped with a filter with a counterweight filter head at its front end.

6. The automatic filling device for isolation fluid in a pressure-conducting differential pressure instrument according to claim 5, characterized in that, The filter adopts a stainless steel filter screen structure, and the counterweight in the filter is made of 304 stainless steel.

7. The automatic filling device for isolation fluid in a pressure-conducting differential pressure instrument according to claim 1, characterized in that, Each of the two branch hoses is equipped with a ball valve, and the ball valve is made of stainless steel with an inner diameter that matches the outer diameter of the branch hose.

8. The automatic filling device for isolation fluid in a pressure-conducting differential pressure instrument according to claim 1, characterized in that, The differential pressure instrument is equipped with drain valves at the high and low pressure side drain ports, and the outlets of the two branch hoses are respectively connected to the two drain valves.

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