Overflow valve series structure protector
By adopting the series structure of the main relief valve and the auxiliary relief valve in the protector, the problem of protector failure caused by the blockage of the relief valve channel by external impurities is solved, effectively isolating the external well fluid impurities, and improving the operating safety and stability of the protector.
Patent Information
- Application Number
- CN202421357459.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-06-14
AI Technical Summary
In the existing protector structure, when external impurities block the relief valve channel, the relief valve cannot be closed normally, causing external well fluid to enter the inner cavity of the protector, causing the protector to fail quickly.
A series structure protector of relief valve is designed, using a series structure of the main relief valve and the auxiliary relief valve. Through mechanical sealing and shaft guard pipes, it is necessary to ensure that the motor oil can effectively isolate external well fluid impurities when the relief valve is opened and prevent it from entering the protector.
Through the series structure of the main relief valve and the auxiliary relief valve, it is ensured that the motor oil can effectively isolate external well fluid impurities when the relief valve is opened, avoid the failure of the protector, and improve the operating safety and stability of the protector.
Smart Images
Figure CN222559285U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of civil air defense doors, in particular to a series structure protector of an overflow valve. Background Art
[0002] The protector in the submersible electric pump unit is connected to the motor. The motor oil in the protector is used to adjust the oil pressure inside the motor and to replenish the motor oil. When the motor is running, the oil in the motor expands due to heat, and the oil flows into the protector, causing the pressure in the protector cavity to increase. The existing protector structure has a relief valve device at the protector head, which is a channel for the motor oil to flow from the protector cavity to the outside. The relief valve sets a certain pressure. When the oil pressure inside the protector is greater than this pressure value, the oil pressure overcomes the spring force in the relief valve, pushes the pressure head and the head seal ring open, and the relief valve is opened. The excess oil flows out to the outside well fluid to maintain the balance of internal and external pressures. When the motor oil pressure inside the protector is less than the relief valve spring pressure, the pressure head and the head seal ring of the relief valve are tightened under the action of the spring, so that the relief valve is closed to prevent the outside well fluid from entering.
[0003] However, when external impurities block the overflow valve channel and the overflow valve cannot close normally, the external well fluid will enter the inner cavity of the protector through the overflow valve channel, causing the protector to fail quickly. Therefore, a overflow valve series structure protector is provided to solve the problems raised in the above background technology. Utility Model Content
[0004] In order to make up for the above deficiencies, the utility model provides a spill valve series structure protector, which aims to solve the problem in the prior art that when external impurities block the spill valve channel, the spill valve cannot be closed normally, and the external well fluid enters the protector cavity through the spill valve channel, causing the protector to fail quickly.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A protector for a relief valve series structure comprises a shell and a relief valve structure, wherein a protector shaft is arranged inside the shell, a protector head is arranged on the upper part of the shell, a mechanical seal is arranged on the upper side of the outer part of the protector shaft, a shaft protection tube is arranged on the outer part of the protector shaft, and the shaft protection tube is fixedly arranged inside the shell.
[0007] Furthermore, the overflow valve structure includes a connecting pipe, which is arranged on the right side of the inner part of the shell, a main overflow valve is arranged on the upper part of the connecting pipe, and an auxiliary overflow is arranged on the lower part of the connecting pipe.
[0008] Furthermore, the main overflow valve is threadedly connected to the upper portion of the connecting pipe.
[0009] Furthermore, the auxiliary overflow thread is connected to the lower part of the connecting pipe.
[0010] Furthermore, the main overflow valve and the auxiliary overflow valve are arranged on the right side of the protector shaft.
[0011] Furthermore, the mechanical seal is arranged inside the protector head.
[0012] Furthermore, the main overflow valve and the auxiliary overflow valve are arranged on the right side of the shaft protection tube.
[0013] The utility model has the following beneficial effects:
[0014] 1. In the utility model, through the cooperation among the mechanical seal, protector head, protector shaft, shaft protection tube, main overflow valve, connecting pipe and auxiliary overflow structures, when the motor oil pressure inside the protector is greater than the set pressure of the main overflow valve, the motor oil first opens the main overflow valve, and the oil flows into the connecting pipe. When the oil pressure in the connecting pipe is greater than the set pressure of the auxiliary overflow valve, the second overflow valve is opened, and the motor oil flows into the external well fluid. Thus, the external well fluid impurities are isolated from the main valve channel to avoid failure. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 A three-dimensional diagram of a spill valve series structure protector proposed by the utility model;
[0016] Figure 2 This is an enlarged view of the overflow valve structure of an overflow valve series structure protector proposed by the utility model.
[0017] Legend:
[0018] 1. Mechanical seal; 2. Protector head; 3. Protector shaft; 4. Overflow valve structure; 5. Shaft protection tube; 6. Shell; 7. Main overflow valve; 8. Connecting pipe; 9. Auxiliary overflow. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] Reference Figure 1 and Figure 2 , an embodiment provided by the utility model:
[0021] A relief valve series structure protector, comprising a housing 6 and a relief valve structure 4, wherein a protector shaft 3 is arranged inside the housing 6, a protector head 2 is arranged on the upper part of the housing 6, a mechanical seal 1 is arranged on the upper side of the outer part of the protector shaft 3, a shaft protection tube 5 is sleeved on the outer part of the protector shaft 3, and the shaft protection tube 5 is fixedly arranged inside the housing 6, and the relief valve structure 4 comprises a connecting pipe 8, which is arranged on the right side inside the housing 6, a main relief valve 7 is arranged on the upper part of the connecting pipe 8, and an auxiliary relief valve 9 is arranged on the lower part of the connecting pipe 8;
[0022] The protector is composed of an outer shell 6, a protector head 2, a mechanical seal 1, a protector shaft 3, a protection shaft tube 5, a relief valve structure 4, etc., wherein the relief valve structure 4 is composed of two relief valves and a protection tube. The first relief valve is a main relief valve 7 with threads at both ends, and the second relief valve is an auxiliary relief valve with threads only at the tail. The tail of the main relief valve 7 is connected to the protector head 2, and the head is connected to the protection tube; there are two internal threads at both ends of the protection tube, and the threads at both ends are respectively connected to the head of the main relief valve 7 and the tail of the auxiliary relief valve. The opening pressures of the main and auxiliary relief valves are different, and the opening pressure of the main valve is greater than the opening pressure of the auxiliary valve. The connecting pipe 8 wraps up the main valve oil leakage channel to isolate it from the external well fluid.
[0023] Reference Figure 1 and Figure 2 , the main overflow valve 7 is threadedly connected to the upper part of the connecting pipe 8, the auxiliary overflow 9 is threadedly connected to the lower part of the connecting pipe 8, the main overflow valve 7 and the auxiliary overflow 9 are arranged on the right side of the protector shaft 3, the mechanical seal 1 is arranged inside the protector head 2, and the main overflow valve 7 and the auxiliary overflow 9 are arranged on the right side of the protection shaft tube 5;
[0024] By threading the main overflow valve 7 at the upper part of the connecting pipe 8, the main overflow valve 7 can be rotatably connected, and by threading the auxiliary overflow 9 at the lower part of the connecting pipe 8, the auxiliary overflow 9 can be rotatably connected. By placing the main overflow valve 7 and the auxiliary overflow 9 on the right side of the protector shaft 3, the safety and stability of the hydraulic system can be improved, ensuring its normal operation and preventing damage caused by pressure overload. By setting a mechanical seal 1 to maintain the sealing of the device, and by placing the main overflow valve 7 and the auxiliary overflow 9 on the right side of the shaft protection tube 5, it is helpful to control the pressure and flow in the system and protect the key internal components from overload and damage.
[0025] Working principle: When using this device, the protector is composed of an outer shell 6, a protector head 2, a mechanical seal 1, a protector shaft 3, a shaft protection tube 5, an overflow valve structure 4, etc., wherein the overflow valve structure 4 is composed of two overflow valves and a protective tube. The first overflow valve is a main overflow valve 7 with threads at both ends, and the second overflow valve is an auxiliary overflow valve with threads only at the tail. When the motor oil pressure inside the protector is greater than the set pressure of the main overflow valve 7, the motor oil first opens the main overflow valve 7, and the oil flows into the connecting pipe 8. When the oil pressure in the connecting pipe 8 is greater than the set pressure of the auxiliary overflow valve, the second overflow valve is opened, and the motor oil flows into the external well fluid, thereby isolating the external well fluid impurities from the main valve channel to avoid failure.
[0026] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A relief valve series structure protector, comprising a housing (6) and a relief valve structure (4), characterized in that: A protector shaft (3) is arranged inside the outer shell (6), a protector head (2) is arranged on the upper part of the outer shell (6), a mechanical seal (1) is arranged on the upper side of the outer part of the protector shaft (3), a shaft protection tube (5) is arranged on the outer part of the protector shaft (3), and the shaft protection tube (5) is fixedly arranged inside the outer shell (6).
2. The overflow valve series structure protector according to claim 1, characterized in that: The overflow valve structure (4) comprises a connecting pipe (8), wherein the connecting pipe (8) is arranged on the right side inside the housing (6), a main overflow valve (7) is arranged on the upper part of the connecting pipe (8), and an auxiliary overflow valve (9) is arranged on the lower part of the connecting pipe (8).
3. The overflow valve series structure protector according to claim 2, characterized in that: The main overflow valve (7) is threadedly connected to the upper part of the connecting pipe (8).
4. The overflow valve series structure protector according to claim 2, characterized in that: The auxiliary overflow (9) is threadedly connected to the lower part of the connecting pipe (8).
5. The overflow valve series structure protector according to claim 2, characterized in that: The main overflow valve (7) and the auxiliary overflow valve (9) are arranged on the right side of the protector shaft (3).
6. The overflow valve series structure protector according to claim 1, characterized in that: The mechanical seal (1) is arranged inside the protector head (2).
7. The overflow valve series structure protector according to claim 2, characterized in that: The main overflow valve (7) and the auxiliary overflow valve (9) are arranged on the right side of the shaft protection tube (5).