Liquid outlet pipe device and methanol storage tank applying same

Abstract

The utility model discloses a liquid outlet pipe device and a methanol storage tank applying the liquid outlet pipe device, which comprise a connecting pipe, one end of the connecting pipe is provided with a liquid inlet structure, the other end of the connecting pipe is provided with a quick connector, and the liquid inlet structure comprises an outer pipe body, an inner pipe body, a ball body, a filter screen and a cover body used for being connected with the outer pipe body; a positioning part, a first liquid inlet cavity and a second liquid inlet cavity are arranged in the outer pipe body, the positioning part is provided with a first through hole communicated with the first liquid inlet cavity and the second liquid inlet cavity, a conical surface body is arranged on the surface of the lower end of the positioning part, the ball body is arranged in the inner pipe body and abuts against the upper portion of the positioning part, and the cover body is connected with an upper end opening of the outer pipe body. And the filter screen is mounted in the first liquid inlet cavity. Through the design of multiple sealing, the anti-backflow ball body and the filter screen, the sealing performance is remarkably improved, the methanol volatilization risk is reduced, meanwhile, the anti-impact and stable conveying functions are achieved, and the device is suitable for safe storage and transportation of high-volatility liquid.

Description

Technical Field

[0001] This utility model relates to the field of storage tank technology, specifically to a liquid outlet pipe device and a methanol storage tank using the liquid outlet pipe device. Background Technology

[0002] Methanol, as an important chemical raw material, is widely used in the production of products such as formaldehyde and methyl tert-butyl ether (MTBE), and is also one of the key fuels in the clean energy field. However, methanol is highly volatile (boiling point 64.7℃) and toxic. During its storage and transportation, it is prone to volatilization due to improper sealing or temperature fluctuations, resulting in resource waste, environmental pollution, and safety hazards. This places stringent requirements on the technical performance of storage equipment.

[0003] Existing methanol storage tanks mostly employ static sealing structures. For example, Chinese patent CN105752416A discloses a "leak-proof methanol storage tank," which improves sealing performance by modifying the sealing gasket at the flange connection. However, this technology still has the following shortcomings:

[0004] 1. Insufficient sealing: Traditional liquid outlet pipes rely on a single sealing structure (such as O-rings or gaskets), which is prone to leakage due to component wear or material aging after long-term use, making it difficult to meet the long-term sealing requirements of highly volatile liquids.

[0005] 2. Lack of filtration and anti-backflow design: Impurities can easily enter the pipeline during liquid transportation, causing blockage or equipment damage. Moreover, the existing technology does not have an effective anti-backflow mechanism. When the machine is shut down, the negative pressure inside the tank can easily cause air backflow, which increases the risk of volatilization.

[0006] In addition, although some improved solutions (such as CN110282148A) have added a filter device, the filter screen fixing method is unstable and is prone to displacement due to liquid impact, which can lead to seal failure. At the same time, the anti-backflow design relies on complex valve structure, which increases maintenance costs and failure rate.

[0007] Therefore, there is an urgent need for a liquid outlet pipe device with multiple sealing, high-efficiency filtration and automatic anti-backflow functions, which can be adapted to methanol storage tanks to solve the problems of poor sealing, easy blockage and insufficient safety in the existing technology, and meet the stringent requirements of the chemical and energy fields for the safe storage of highly volatile liquids. Summary of the Invention

[0008] The present invention aims to solve the problems of poor sealing, easy blockage and lack of backflow prevention function of methanol storage tank outlet pipe in the prior art, and provides an outlet pipe device with compact structure, reliable sealing and filtration capability, as well as a methanol storage tank using the outlet pipe device.

[0009] This utility model discloses a liquid outlet pipe device, including a connecting pipe, one end of which is provided with a liquid inlet structure, and the other end of which is provided with a quick connector. The liquid inlet structure includes an outer pipe body, an inner pipe body, a ball, a filter screen, and a cover for connecting with the outer pipe body.

[0010] The outer tube is provided with a positioning part, a first liquid inlet chamber and a second liquid inlet chamber. The positioning part is provided with a first through hole that communicates with the first liquid inlet chamber and the second liquid inlet chamber. The inner tube is embedded in the second liquid inlet chamber and is located above the positioning part. The lower end surface of the positioning part is provided with a conical body. The sphere is placed in the inner tube and abuts against the upper part of the positioning part. The cover is connected to the upper port of the outer tube. The filter screen is installed in the first liquid inlet chamber.

[0011] Furthermore, one end of the connecting pipe connected to the liquid inlet structure is provided with a beveled liquid inlet, and the cover is provided with a second through hole through which the connecting pipe passes, and the liquid inlet passes through the second through hole and extends to the outside of the cover.

[0012] Furthermore, the lower end of the cover is provided with an external thread, and the inner wall of the upper end of the outer tube is provided with an internal thread adapted to the external thread connection.

[0013] Furthermore, it also includes a retaining ring, wherein the inner wall of the lower end of the outer tube is provided with a retaining ring groove for installing the retaining ring.

[0014] Furthermore, a first sealing ring is provided between the positioning part and the inner tube body, and a recess is provided on the upper surface of the positioning part, where the first sealing ring is placed.

[0015] Furthermore, it also includes a second sealing ring, which is disposed between the conical body and the filter screen.

[0016] Furthermore, the inner diameter D1 of the upper end of the inner tube is greater than the inner diameter D2 of the lower end of the inner tube.

[0017] Furthermore, it also includes a third sealing ring, and the cover body is provided with a concave groove for installing the third sealing ring.

[0018] The present invention also discloses a methanol storage tank that should use the above-mentioned liquid outlet pipe device, including a tank body, wherein the liquid outlet pipe device is installed in the tank body and the liquid inlet structure is installed in the tank body until the quick connector abuts the top of the tank body, the quick connector is provided with an external thread at one end connected to the connecting pipe, and the tank body is provided with an internal thread that is threaded to the external thread of the connector.

[0019] Furthermore, at least one buffer rubber ring is installed on the surface of the tank body, and a bracket is welded to the tank body, with a ring welded to the top of the bracket.

[0020] This utility model achieves significant improvements through the above technical means as follows:

[0021] First, the axial and radial triple seal is achieved through the first, second, and third sealing rings, which significantly reduces the risk of methanol volatilization and serves as a multi-seal design.

[0022] 2. The ball inside the inner tube automatically opens and closes under liquid pressure, working with the filter screen to intercept impurities, ensuring unobstructed pipeline flow, preventing backflow, and providing filtration functions.

[0023] 3. The support and ring reinforcement are used to protect the liquid outlet tube, making it easy to transport and providing structural stability.

[0024] Fourth, the retaining spring secures the filter screen to prevent it from detaching from the outer tube, thus effectively fixing the filter screen in place. Attached Figure Description

[0025] The above and / or additional aspects and advantages of this invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings.

[0026] Figure 1 This is a structural diagram of the liquid outlet pipe of this utility model.

[0027] Figure 2 This is another structural diagram of the liquid outlet tube of this utility model.

[0028] Figure 3 yes Figure 2 A magnified view of the structure at point A.

[0029] Figure 4 Figure 2 A magnified view of the structure at point B.

[0030] Figure 5 This is a structural diagram showing the connection between the outer tube, connecting tube, and connector of this utility model.

[0031] Figure 6 This is a schematic diagram of the connection structure of the tank body, connector, buffer rubber ring, bracket and ring of this utility model.

[0032] Figure 7 This is a schematic diagram of the connection structure between the tank body and the connector of this utility model.

[0033] As shown in the attached diagram, the following components are labeled: outer tube 1, positioning part 101, first liquid inlet chamber 1011, second liquid inlet chamber 1012, internal thread 1013, first through hole 102, conical body 103, recess 104, inner tube 2, cover 3, third sealing ring 301, liquid inlet 302, connecting pipe 303, concave groove 3011, second through hole 3031, external thread 304, ball 4, first sealing ring 5, second sealing ring 6, filter screen 7, snap ring 8, snap ring groove 81, quick connector 9, connector external thread 91, tank body 10, tank internal thread 1001, buffer rubber ring 11, bracket 12, ring 13, concave groove 3011, liquid inlet device 44. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] The following is for reference. Figures 1 to 7 According to an embodiment of the present invention, a liquid outlet pipe device includes a connecting pipe 303. One end of the connecting pipe 303 is provided with a liquid inlet structure, and the other end of the connecting pipe 303 is provided with a quick connector 9. The liquid inlet structure includes an outer pipe body 1, an inner pipe body 2, a ball 4, a filter screen 7, and a cover 3 for connecting with the outer pipe body 1. The outer pipe body 1 is provided with a positioning part 101, a first liquid inlet chamber 1011, and a second liquid inlet chamber 1012. The positioning part 101 is provided with a first through hole 102 communicating with the first liquid inlet chamber 1011 and the second liquid inlet chamber 1012. The inner pipe body 2 is embedded in the second liquid inlet chamber 1012 and is located above the positioning part 101. The lower end surface of the positioning part 101 is provided with a conical body 103. The ball 4 is placed in the inner pipe body 2 and abuts against the upper part of the positioning part 101. The cover 3 is connected to the upper port of the outer pipe body 1. The filter screen 7 is installed in the first liquid inlet chamber 1011.

[0036] The connecting pipe 303 has a beveled inlet 302 at one end connected to the liquid inlet structure. The cover 3 has a second through hole 3031 through which the connecting pipe 303 passes. The inlet 302 passes through the second through hole 3031 and extends to the outside of the cover 3. The distance between the bottom of the inlet 302 and the bottom surface of the cover 3 is 1mm to 10mm. The bottom surface of the beveled inlet 302 is used to press against a local surface of the sphere 4 and, in conjunction with the inner tube 2, restrict the lateral movement of the sphere 4, ensuring that the sphere 4 cannot block the inlet 302 and maintaining the liquid outlet effect. Specifically, as shown... Figure 1 and Figure 2As shown, when the liquid outlet device is working, the liquid enters from the first inlet chamber 1011 and flows sequentially through the filter screen 7, the conical body 103, the first through hole 102, and then the liquid impacts the ball 4. The ball 4 will move upward in a straight line until the surface of the ball 4 touches the inlet 302. Since the longitudinal section of the inlet 302 is inclined, the surface of the ball 4 can only touch the highest point of the inclined surface of the inlet 302. That is, the ball 4 completely blocks the inlet 302 due to the impact of the liquid, thereby ensuring that the liquid enters smoothly from the inlet 302, flows through the connecting pipe 303, and is discharged from the quick connector 9.

[0037] The lower end of the cover 3 is provided with an external thread 304, and the inner wall of the upper end of the outer tube 1 is provided with an internal thread 1013 adapted to the external thread 304 for threaded connection, which serves to fix the position of the cover 3.

[0038] This embodiment also includes a retaining ring 8. The inner wall of the lower end of the outer tube 1 is provided with a retaining ring groove 81 for installing the retaining ring 8, which secures the retaining ring 8 and prevents the filter screen 7 from detaching from the outer tube 1. The filter screen 7 is installed in the first liquid inlet chamber 1011. Specifically, as follows... Figure 2 and Figure 3 As shown, the filter screen 7 is located between the conical body 103 and the retaining ring 8. To reduce the noise caused by the collision between the filter screen 7 and the conical body 103 when the liquid flows through the filter screen 7 during operation, and to ensure the sealing between the filter screen 7 and the conical body 103, a second sealing ring 6 is provided between the filter screen 7 and the conical body 103; the lower end surface of the positioning part 101 is provided with a conical body 103, and the cross-section of the conical body 103 is V-shaped, as shown... Figure 2 As shown, when the retaining ring 8 is installed in the retaining ring groove 81, the lower part of the conical body 103 abuts against the upper surface of the second sealing ring 6, providing sealing and vibration damping. The upper part of the conical body 103 is coaxially connected to the first through hole 102. For those skilled in the art, the V-shaped conical body 103 can keep the liquid flow coefficient constant over a long period, ensuring stable flow.

[0039] A first sealing ring 5 is provided between the positioning part 101 and the inner tube body 2. A recess 104 is provided on the upper surface of the positioning part 101. The first sealing ring 5 is placed in the recess 104 and the outer diameter of the first sealing ring 5 abuts against the inner diameter of the recess 104. That is, the recess 104 is used to restrict the left and right movement of the first sealing ring 5. The lower end of the inner tube body 2 abuts against the top surface of the first sealing ring 5, which can restrict the position of the first sealing ring 5 and prevent it from falling out of the recess 104.

[0040] The inner diameter D1 of the upper end of the inner tube 2 is larger than the inner diameter D2 of the lower end of the inner tube 2. For example... Figure 1 and Figure 2As shown, to facilitate the assembly of the inner sphere 4 with the inner tube 2 and to ensure that the sphere 4 abuts against the upper part of the positioning part 101 after assembly; to clearly illustrate that D1 is greater than D2, in this embodiment, the inner diameter D1 of the upper port of the inner tube 2 is 8mm, the inner diameter D2 of the lower port of the inner tube 2 is 6mm, and the diameter of the sphere 4 is 5mm, as shown. Figure 1 As stated, when the sphere 4 falls into the inner tube 2 from the upper end opening, since the inner diameter D1 (8mm) is larger than the diameter of the sphere 4 (5mm), the sphere 4, utilizing its own gravity, easily enters the inner tube 2 and smoothly reaches the lower end of the inner tube 2, thereby sealing the first through hole 102. Figure 1 As shown, to further enhance the sealing performance between the ball 4 and the first through hole 102 and to reduce the noise generated by the impact of the liquid flow on the inner tube 2, a first sealing ring 5 is provided between the first through hole 102 and the ball 4. The inner ring diameter of the first sealing ring 5 is the same as that of the first through hole 102. For clarity, in this embodiment, the first through hole 102 is 3mm. After the ball 4 and the inner tube 2 are installed, the ball 4 is completely sealed to the first through hole 102. Without the action of external force, the ball 4 realizes the working principle structure of the one-way valve by utilizing the principle of gravity.

[0041] For this embodiment, such as Figure 1 As shown, it also includes a third sealing ring 301, and the cover body 3 is provided with a concave groove 3011 for installing the third sealing ring 301. The concave groove 3011 is located above the external thread 304. When the cover body 3 is connected to the outer tube body 1, the outer surface of the third sealing ring 301 abuts against the inner wall of the second liquid inlet chamber 1012.

[0042] like Figure 5 , Figure 6 and Figure 7 As shown, this utility model discloses a methanol storage tank using the above-mentioned liquid outlet pipe device, including a tank body 10 and a liquid inlet device 44. The liquid outlet pipe device is installed in the tank body 10 and the liquid inlet structure is installed inside the tank body 10 until the quick connector 9 abuts the top of the tank body 10. The quick connector 9 is connected to the connecting pipe 303 at one end and is provided with an external thread 91. The tank body 10 is provided with an internal thread 1001 that is threadedly connected to the external thread 91. The quick connector 9 is screwed onto the internal thread 1001 of the tank body 10 through the external thread 91, so that the quick connector 9 can be fixed at the upper surface of the tank body 10.

[0043] Specifically, at least one buffer rubber ring 11 is installed on the surface of the tank body 10, and a bracket 12 is welded to the tank body 10. A ring 13 is welded to the top of the bracket 12. The bracket 12 and the ring 13 can protect the quick connector 9 from damage due to external force, thereby preventing liquid leakage in the methanol storage tank.

[0044] The operation process of this embodiment is as follows:

[0045] Liquid injection: Methanol is injected into the storage tank through the liquid inlet device 44. As described above, when there is no external force acting on the liquid outlet device, the ball 4 realizes the working principle structure of the one-way valve by using the principle of gravity, so that the first through hole 102 in the outer tube 1 of the liquid outlet device in this embodiment is in a closed state, that is, the ball 4 is sealed in the first through hole 102, and the ball 4 cooperates with the first sealing ring 5 to implement further sealing.

[0046] Liquid discharge: When it is necessary to drain the internal liquid, first connect to the external vacuum pump via quick connector 9, start the vacuum pump, and under the external force of the vacuum pump, the ball 4 leaves the first through hole 102. Under the external force, the ball 4 moves further vertically upward until the surface of the ball 4 touches the highest point of the inclined surface of the liquid inlet 302, i.e. Figure 1 , Figure 2 As shown, the liquid in the methanol storage tank flows out sequentially through the first inlet chamber 1011, filter screen 7, conical body 103, first through hole 102, ball 4, second inlet chamber 1012, inlet 302, connecting pipe 303, and quick connector 9.

[0047] Shutdown: After the vacuum pump stops, the ball 4 seals with the first through hole 102 again using the principle of gravity; in addition, when the vacuum pump stops, the negative pressure in the methanol storage tank can easily cause air backflow. The quick connector 9 in this embodiment effectively prevents air from backflowing into the methanol storage tank. At the same time, the one-way valve working principle implemented by the ball 4 further effectively prevents air from backflowing into the methanol storage tank.

Claims

1. A liquid outlet pipe device, comprising a connecting pipe (303), one end of the connecting pipe (303) being provided with a liquid inlet structure, and the other end of the connecting pipe (303) being provided with a quick connector (9), characterized in that: The liquid inlet structure includes an outer tube (1), an inner tube (2), a ball (4), a filter screen (7), and a cover (3) for connecting to the outer tube (1); The outer tube (1) is provided with a positioning part (101), a first liquid inlet chamber (1011) and a second liquid inlet chamber (1012). The positioning part (101) is provided with a first through hole (102) that communicates with the first liquid inlet chamber (1011) and the second liquid inlet chamber (1012). The inner tube (2) is embedded in the second liquid inlet chamber (1012) and located above the positioning part (101). The lower end surface of the positioning part (101) is provided with a conical body (103). The sphere (4) is placed in the inner tube (2) and abuts against the upper part of the positioning part (101). The cover (3) is connected to the upper port of the outer tube (1). The filter screen (7) is installed in the first liquid inlet chamber (1011).

2. The liquid outlet tube device of claim 1, wherein: The end of the connecting pipe (303) connected to the liquid inlet structure is provided with a beveled liquid inlet (302). The cover (3) is provided with a second through hole (3031) through which the connecting pipe (303) passes. The liquid inlet (302) passes through the second through hole (3031) and extends to the outside of the cover (3).

3. The liquid outlet tube device of claim 1, wherein, The lower end of the cover (3) is provided with an external thread (304), and the inner wall of the upper end of the outer tube (1) is provided with an internal thread (1013) adapted to the external thread (304) thread connection.

4. The liquid outlet tube device of claim 1, wherein, It also includes a retaining ring (8), and the inner wall of the lower end of the outer tube (1) is provided with a retaining ring groove (81) for installing the retaining ring (8).

5. The liquid outlet tube device of claim 1, wherein, A first sealing ring (5) is provided between the positioning part (101) and the inner tube body (2), and a recess (104) is provided on the upper surface of the positioning part (101), and the first sealing ring (5) is placed in the recess (104).

6. The liquid outlet tube device of claim 4, wherein It also includes a second sealing ring (6), which is disposed between the conical body (103) and the filter screen (7).

7. The liquid outlet tube device of claim 1, wherein, The inner diameter D1 of the upper end of the inner tube (2) is greater than the inner diameter D2 of the lower end of the inner tube (2).

8. The liquid outlet tube device of claim 3, wherein, It also includes a third sealing ring (301), and the cover (3) is provided with a concave groove (3011) for installing the third sealing ring (301).

9. A methanol storage tank using the liquid outlet pipe device according to any one of claims 1 to 8, comprising a tank body (10), characterized in that, The liquid outlet pipe device is installed in the tank body (10) and the liquid inlet structure is installed inside the tank body (10) until the quick connector (9) touches the top of the tank body (10). The quick connector (9) is connected to the connecting pipe (303) with an external thread (91). The tank body (10) is provided with an internal thread (1001) that is threaded to the external thread (91).

10. The methanol storage tank using the outlet pipe device according to claim 9, characterized in that, At least one buffer rubber ring (11) is installed on the surface of the tank body (10), and a bracket (12) is welded to the tank body (10), with a ring (13) welded to the top of the bracket (12).

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