Self-sealing anti-dripping loading telescopic vertical pipe for swivel

Abstract

The present application relates to a kind of self-sealing anti-dripping loading telescopic vertical pipe for swivel, including outer tube, inner tube and the inner tube telescopic reset mechanism for driving the inner tube, the bottom of the outer tube is equipped with liquid collecting device, the liquid collecting device includes liquid collecting cavity, the top of the liquid collecting device is equipped with liquid collecting port, liquid collecting port is communicated with the liquid collecting cavity.Self-sealing anti-dripping loading telescopic vertical pipe for swivel in the present application is collected by setting liquid collecting device on the bottom of outer tube, residual fluid material is collected by the liquid collecting port on the liquid collecting device on the wall of outer tube and flows down, and it is collected in the liquid collecting cavity therein, reduce the situation that residual fluid material on vertical pipe directly drips to site after it is pulled out.

Description

Technical Field

[0001] This invention relates to the field of fluid filling equipment, specifically to a self-sealing anti-drip telescopic vertical pipe for loading arms. Background Technology

[0002] A vertical pipe is a component at the end of an loading arm, used to insert into the tanker opening of a tank truck to transport materials. Because it operates perpendicular to the ground, it is called a vertical pipe. Vertical pipes have a through-hole structure, allowing material to flow through. Depending on the characteristics of the material being transported, vertical pipes are classified as single-layer fixed vertical pipes and multi-layer telescopic vertical pipes.

[0003] Multi-layer telescopic drop pipes are generally used in applications involving the conveying of flammable and explosive materials, or materials requiring submerged loading. Currently, most telescopic drop pipes used in the industry employ tension springs or traction weights to control their automatic extension and retraction. That is, when material impacts the inner sleeve of the drop pipe, the inner sleeve automatically extends beyond the outer sleeve, simultaneously stretching the tension spring inside the drop pipe or lifting the weight. Figure 1 As shown. When the material stops impacting the inner sleeve of the vertical tube, the inner sleeve automatically retracts into the outer sleeve under the spring's return force or the weight of the plumb bob, as... Figure 2 As shown.

[0004] Because the loading arm is immersed in the material during operation, when it is pulled out of the tank after loading, the material adhering to the inner and outer surfaces of the loading arm will drip down the pipe wall. Depending on the viscosity of the material, this phenomenon can last from a few minutes to more than ten minutes. However, many loading stations load up to 10 trucks a day. In order to ensure efficiency, on-site operators generally do not wait a few minutes for the material adhering to the wall of the loading arm to drip off completely. Instead, they return the loading arm to the platform directly after it is pulled out of the tank. This results in material that has not yet dripped into the tank dripping directly onto the tank of the tanker and the road along the way. This not only causes waste of materials and environmental pollution, but also poses safety hazards such as explosions and poisoning for flammable, explosive, highly toxic and volatile materials.

[0005] The current common solution is to place portable liquid collection buckets at the loading site. After each loading, the bucket is used to cover the outlet of the drop pipe after it is lifted out of the tank, thus collecting the dripping material. However, hanging and removing the bucket requires manual operation, which not only increases the labor intensity of workers, but also, due to the lack of a sealed system, allows many volatile materials collected to diffuse into the air over time, failing to meet safety, environmental, and health requirements. Furthermore, the material collected in this way becomes contaminated with dust and sand particles from the air, making it impossible to pour into the tanker truck during the next loading and forcing it to be treated as waste liquid, resulting in waste. Summary of the Invention

[0006] The technical problem to be solved by this invention is to propose a self-sealing anti-drip telescopic vertical pipe for loading arms that can collect residual liquid and prevent material from dripping.

[0007] The technical solution proposed by this invention to solve the above-mentioned technical problems is: a self-sealing anti-drip telescopic vertical pipe for loading arms, comprising an outer pipe, an inner pipe, and an inner pipe telescopic reset mechanism for driving the inner pipe. The bottom of the outer tube is provided with a liquid collecting device, which includes a liquid collecting chamber and a liquid collecting port at the top of the liquid collecting device, which is connected to the liquid collecting chamber.

[0008] Furthermore, the liquid collecting cavity is formed by the cavity wall and the outer wall of the outer tube, and a drain port is provided at the bottom of the liquid collecting cavity; It also includes a sealing block for closing or opening the drain outlet.

[0009] Furthermore, the sealing block is connected to the inner tube and extends laterally from the bottom of the inner tube. When the inner tube retracts, it moves the sealing block upward to seal the drain outlet and form a seal.

[0010] Furthermore, a sealing block is provided in the bottom opening of the inner tube, the sealing block forms a seal on the bottom of the inner tube, and the sealing block is connected to the sealing block and extends horizontally in a wing-like manner.

[0011] Furthermore, the interior of the sealing block is hollow, forming a buoyancy cavity.

[0012] Furthermore, the outer tube is coaxially fitted around the inner tube, forming an annular gap between the outer tube and the inner tube. The bottom end of the outer tube is provided with an annular seal. When the inner tube is in the retracted state, the annular seal forms a sealing fit with the outer wall surface of the inner tube, thus sealing the annular gap.

[0013] Furthermore, the annular seal includes an annular sealing seat for connection to the outer tube. The inner side of the annular sealing seat is provided with at least one annular groove, and an annular sealing ring is provided in the annular groove. The inner side of the annular sealing ring has an elastic sealing lip, which is used to abut against the outer wall of the bottom of the inner tube to form an interference seal fit.

[0014] Furthermore, a discharge port is provided at the bottom of the inner tube. The inner diameter of the annular sealing ring is larger than the outer diameter of the inner tube at the location of the discharge port. The outer diameter of the inner tube located below the discharge port gradually increases from top to bottom, forming a gradually bulging sloping annular surface. The outer diameter of the sloping annular surface at its maximum is matched with the inner diameter of the annular sealing ring, and this point is used to fit against the sealing lip and form a sealing fit.

[0015] Furthermore, a pressure relief pipe is also provided in the inner tube. The air inlet of the pressure relief pipe is located at a preset height inside the inner pipe, and the pressure relief pipe passes through the sealing block and its exhaust end is connected to the outside.

[0016] Furthermore, the outer tube is provided with a locking cone, on which a groove with a tapered diameter is formed. The cross-section of the groove is a smoothly transitioning arc shape, and below the groove is a guide cone. The top of the inner tube is provided with an elastic locking structure for engaging with the slot. The elastic locking structure includes a locking pin, the rear of which is connected to an elastic pusher, and the front end of which is a ball head whose shape matches the cross-sectional trace of the slot.

[0017] Furthermore, a suspension bracket is installed at a pre-set location inside the outer tube. The suspension bracket includes a first support ring, inside which a connecting rod is provided. The connecting rod has a threaded hole. The top of the locking cone is a lead screw, which is screwed into the threaded hole to be hoisted and fixed in the outer tube.

[0018] Furthermore, the elastic locking structure also includes a second support ring, the interior of which is provided with a connecting frame. The connecting frame has a central hole positioned opposite the locking cone and used to allow the locking cone to pass through it. The connecting frame has a locking pin guide hole inside, which connects to the central hole and forms an opening on the side wall of the central hole. The locking pin is movably installed in the locking pin guide hole, and the ball head can extend from the opening and reach the central hole. The elastic pusher is a compression spring.

[0019] Furthermore, the locking pin guide hole includes an outlet section and a guide section with an inner diameter larger than the outlet section. The locking pin includes a ball head and a limiting boss disposed at the rear of the ball head. The limiting boss is used to be disposed in the guide section, and the outer diameter of the limiting boss is adapted to the guide section and larger than the outlet section.

[0020] Furthermore, it also includes an adjusting plug, with one end of the compression spring connected to the tail of the locking pin and the other end fixed to the adjusting plug. The tail section of the locking pin guide hole is an internal thread section, and the adjusting plug is screwed into the internal thread section.

[0021] The beneficial effects of this invention are: The self-sealing anti-drip loading telescopic plumb bob of the present invention has a liquid collection device at the bottom of the outer pipe. The liquid collection device collects the residual fluid material hanging on the wall of the outer pipe and flows down through the liquid collection port, and collects it in the liquid collection chamber therein, thereby reducing the occurrence of residual fluid material dripping directly onto the site after the plumb bob is pulled out.

[0022] It is worth mentioning that the vertical tube in this invention also has a drain port at the bottom of the liquid collecting chamber, and a sealing block is provided at the bottom of the inner tube. The advantage of this design is that: 1. Because the bottom of the outer tube will be submerged in the material during filling, when the vertical tube is finished filling and lifted upwards, the material flowing into the liquid collection chamber will first flow out from the drain port at the bottom. Setting up the drain port can prevent the liquid collection chamber from being filled after being lifted upwards, thus preventing the liquid collection function from failing.

[0023] 2. As the vertical pipe is further lifted, the outer pipe detaches from the material inside the tank first, followed by the inner pipe. The sealing block at the bottom of the inner pipe detaches last. Initially, the outer pipe has a significant amount of material clinging to the wall. This material can initially flow downwards from the collection port into the collection chamber. However, during this process, the drain port remains open (the sealing block at the bottom of the inner pipe has not yet retracted fully), causing the material to flow downwards into the tank. Throughout the lifting process, the drain port remains open, providing ample time for the material clinging to the outer pipe to flow back into the tank, thus preventing material from being carried out of the tank and creating a new risk of leakage.

[0024] 2. As the vertical tube continues to rise until the bottom of the inner tube is also lifted above the material liquid surface, the material inside the inner tube flows out from the discharge port of the inner tube, and the weight of the inner tube is reduced. At this time, under the action of the reset mechanism, the inner tube retracts and moves upward with the sealing block until it seals the discharge port.

[0025] This is the final stage of the lifting action. During the entire lifting process, the amount of material adhering to the outer tube has been greatly reduced. When the entire vertical tube is lifted out of the tank opening and transferred, the drain port is closed. Even if the small amount of residual material adhering to the outer tube falls, it will eventually be collected into the collection chamber, thus preventing leakage. Attached Figure Description

[0026] The self-sealing anti-drip telescopic vertical pipe for loading arms of the present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the structure of the vertical tube in its elongated state.

[0028] Figure 2 This is a schematic diagram of the vertical tube in the retracted state.

[0029] Figure 3This is a cross-sectional view (a) of the vertical tube structure in this invention.

[0030] Figure 4 This is a cross-sectional view (II) of the vertical tube structure in this invention.

[0031] Figure 5 This is a schematic diagram of the liquid collection device when the vertical tube is in the extended state in this invention.

[0032] Figure 6 is Figure 3 Enlarged view of section A.

[0033] Figure 7 yes Figure 3 Enlarged view of section B in the middle.

[0034] Figure 8 yes Figure 3 Enlarged view of section C.

[0035] Figure 9 yes Figure 3 Enlarged view of section D in the middle.

[0036] Figure 10 yes Figure 4 Enlarged view of section E in the middle.

[0037] Figure 11 yes Figure 4 Enlarged view of section F in the middle.

[0038] Figure 12 This is a schematic diagram of the first support ring.

[0039] Figure 13 This is a schematic diagram of the second support ring.

[0040] Figure 14 This is a structural diagram of the locking pin.

[0041] Figure 15 This is a schematic diagram of the vertical tube in the liquid collection state in this invention. Implementation

[0042] Example

[0043] according to Figure 3 , Figure 4 and Figure 5 As shown, the present invention includes a self-sealing anti-drip loading telescopic vertical pipe for loading arms, comprising an outer pipe 1, an inner pipe 2, and an inner pipe telescopic reset mechanism for driving the inner pipe 2.

[0044] In this embodiment, the inner tube extension and resetting mechanism is a compression spring 3 disposed between the outer tube 1 and the inner tube 2. The top of the compression spring 3 is connected to the top of the inner tube 2, and the bottom is connected to the bottom of the outer tube 1. When the inner tube 2 is impacted by material, it overcomes the extension force of the compression spring 3 and compresses the spring 3 downward, causing the inner tube 2 to extend. When filling is finished, when the weight of the inner tube 2 and the combined impact force it experiences are less than the spring extension force, the compression spring 3 will extend and simultaneously retract the inner tube 2 upward. Of course, other existing resetting mechanisms that can equivalently achieve the extension and retraction of the inner and outer tubes 1 can also be used, which will not be described in detail here.

[0045] The bottom of the outer tube 1 is provided with a liquid collecting device 4, which includes a liquid collecting chamber 402 and a liquid collecting port 401 at the top, which is connected to the liquid collecting chamber 402.

[0046] Preferably, the liquid collecting chamber 402 is formed by the chamber wall 404 and the outer wall of the outer tube 1, and a drain port 403 is provided at the bottom of the liquid collecting chamber 402. In this embodiment, the chamber wall 404 is a cylinder spaced apart from the outer wall of the outer tube 1, and the chamber wall 404 surrounds the outer wall of the outer tube 1 in a ring shape, so the overall liquid collecting device 4 is a tapered shape that tapers downwards.

[0047] It also includes a sealing block 5 for closing or opening the drain outlet 403.

[0048] The sealing block 5 is connected to the inner tube 2 and extends laterally from the bottom of the inner tube 2. When the inner tube 2 retracts, it drives the sealing block 5 upward to seal the drain port 403 to form a seal. Specifically, preferably, a sealing main block 6 is provided in the bottom opening of the inner tube 2, the sealing main block 6 forms a seal on the bottom of the inner tube 2, and the sealing block 5 is connected to the sealing main block 6 and extends horizontally in a wing-like manner. To achieve buoyancy in the material, the interior of the sealing main block 6 can be hollow, forming a buoyancy cavity 7.

[0049] To further enhance sealing, it is preferable that the outer tube 1 is coaxially fitted around the inner tube 2, forming an annular gap between the outer tube 1 and the inner tube 2. An annular seal 8 is provided at the bottom end of the outer tube 1. When the inner tube 2 is in the retracted state, the annular seal 8 forms a sealing fit with the outer wall surface of the inner tube 2, sealing the annular gap and preventing material in the inner tube 2 from dripping to the outside through the gap.

[0050] The compression spring 3 is disposed in the annular gap, and the bottom end of the compression spring abuts against the annular seal 8.

[0051] More preferably, the annular seal 8 includes an annular sealing seat 801 for connection to the outer tube 1. The annular sealing seat 801 has an annular groove on its inner side, and an annular sealing ring 802 is provided in the groove. The inner side of the annular sealing ring 802 has an elastic sealing lip, which abuts against the outer wall of the bottom of the inner tube 2 to form an interference fit. Even more preferably, the inner tube 2 has a discharge port 201 at its bottom. To prevent the annular sealing ring 802 from being damaged by the reciprocating friction of the edge of the discharge port 201 due to the expansion and contraction of the inner tube 2, the inner diameter of the annular sealing ring 802 can be set larger than the outer diameter of the inner tube 2 at the location of the discharge port 201. The outer diameter of the inner tube 2 below the discharge port 201 gradually increases from top to bottom, forming a gradually bulging sloping annular surface 202. The maximum outer diameter of the sloping annular surface 202 matches the inner diameter of the annular sealing ring 802, and this point is used to contact the sealing lip and form a sealing fit. Specifically, the sloping annular surface 202 can be composed of a sealing base ring fitted onto the inner tube 2.

[0052] Considering the material is a chemical product, if the remaining material in the inner tube 2 volatilizes or reacts to produce gas, it can easily generate a certain pressure inside the inner tube 2, causing the inner tube 2 to overcome the stretching force of the compression spring 3 and push the inner tube 2 out of the outer tube 1, creating a gap and thus a risk of leakage. Therefore, it is preferable to also provide a pressure relief pipe 9 from the outer tube 1 to the inner tube 2. The air inlet 901 of the pressure relief pipe 9 is located at a preset height inside the inner tube 2, the specific height of which is determined according to the actual length of the inner tube. In this embodiment, it is set at 80% of the height of the inner tube. The pressure relief pipe 9 passes through the sealing block 6 and its exhaust end 902 is connected to the outside. In this way, even if the material remaining in the inner tube 2 produces excess gas, it can be discharged to the outside from the pressure relief pipe 9 in a timely manner, keeping the air pressure inside the inner tube 2 consistent with the outside, and avoiding the risk of dripping caused by the inner tube being pushed out due to high internal air pressure. In this embodiment, a guide cap is also provided at the air inlet 901 to prevent material from flowing into the pressure relief pipe during filling.

[0053] To achieve better fixation between the inner tube 2 and the outer tube 1, a relatively stable relationship is formed between the inner tube 2 and the outer tube 1 when the inner tube 2 is retracted, preventing it from easily extending. A preferred option is: The outer tube 1 is provided with a locking cone 10, and a groove with a tapered diameter is formed on the locking cone 10. The cross section of the groove is a smoothly transitioning arc shape, and the guide cone is located below the groove.

[0054] An elastic locking structure for engaging with the slot is provided at the top of the inner tube 2.

[0055] The elastic locking structure includes a locking pin 11, with an elastic pusher connected to the rear of the locking pin 11, and the front end of the locking pin 11 is a ball head 1101 whose shape matches the cross-sectional trace of the slot.

[0056] Specifically preferred: a suspension frame is installed at the pre-set position (top position in this embodiment) inside the outer tube 1. The suspension frame includes a first support ring 12, and a connecting rod 1201 is provided inside the first support ring 12. A threaded hole 1202 is opened on the connecting rod.

[0057] The top of the locking cone 10 is a lead screw, which is screwed into the threaded hole 1202 for hoisting and fixing in the outer tube 1. In practice, a lock nut 13 can be added to the lead screw protruding from the threaded hole for further fixation.

[0058] A further preferred embodiment of the elastic locking structure includes a second support ring 14. The second support ring 14 has a connecting frame inside. The connecting frame 1401 has a central hole 1402, which is positioned opposite to the locking cone 10 and allows the locking cone 10 to pass through it. The connecting frame 1401 has a locking pin guide hole 1405 inside, which connects to the central hole 1402 and forms an opening on the side wall of the central hole 1402. The locking pin 11 is movably installed in the locking pin guide hole 1405, and the ball head 1101 can extend from the opening and reach the central hole 1402.

[0059] The elastic pusher is a thrust spring 1403.

[0060] To better control the movement of the locking pin 11, the locking pin guide hole 1405 can be further configured as follows: the locking pin guide hole 1405 includes an outlet section and a guide section with an inner diameter larger than the outlet section; the locking pin 11 includes a ball head 1101 and a limiting boss 1102 located at the rear of the ball head 1101; the limiting boss 1102 is positioned within the guide section, and its outer diameter is compatible with the guide section and larger than the outlet section. It can also be further configured to include an adjusting plug 1404; one end of the thrust spring 1403 is connected to the tail of the locking pin 11, and the other end is fixed to the adjusting plug 1404; the tail section of the locking pin guide hole 1405 is an internally threaded section, and the adjusting plug 1404 is screwed into the internally threaded section.

[0061] When the material in the inner tube 2 is emptied, the inner tube extension and reset mechanism, i.e., the compression spring 3, drives the inner tube 2 to move upward. Due to inertia or the strong force of the compression spring 3, the locking pin 11 is driven into the slot, and the ball head 1101 of the locking pin 11 is stably engaged in the slot under the thrust of the elastic element thrust spring 1403. The locking pin 11, along with the inner tube 2, is stably suspended on the locking pin 11.

[0062] When material is injected into the inner tube 2 or when it is impacted by material, the inner tube 2 tends to move downwards and when it is subjected to a sufficiently large impact force, the locking pin 11 overcomes the thrust spring 1403 and slides out of the slot, thereby releasing the locking limit between the inner and outer tubes 1, and the inner tube 2 extends out of the outer tube 1.

[0063] The present invention is not limited to the above embodiments. The technical solutions of the above embodiments of the present invention can be combined with each other to form new technical solutions. In addition, all technical solutions formed by equivalent substitutions fall within the protection scope claimed by the present invention.

Claims

1. A self-sealing anti-drip telescopic vertical pipe for loading arms, comprising an outer pipe, an inner pipe, and an inner pipe telescopic reset mechanism for driving the inner pipe, characterized in that: The bottom of the outer tube is provided with a liquid collecting device, which includes a liquid collecting chamber and a liquid collecting port at the top of the liquid collecting device, which is connected to the liquid collecting chamber. The liquid collecting cavity is formed by the cavity wall and the outer wall of the outer tube, and a drain port is provided at the bottom of the liquid collecting cavity; It also includes a sealing block for closing or opening the drain outlet; The sealing block is connected to the inner tube and extends laterally from the bottom of the inner tube. When the inner tube retracts, it moves the sealing block upward to seal the drain outlet and form a seal.

2. The self-sealing anti-drip loading telescopic vertical pipe for loading arms according to claim 1, characterized in that: A sealing block is provided in the bottom opening of the inner tube, the sealing block forms a seal on the bottom of the inner tube, and the sealing block is connected to the sealing block and extends out horizontally in a wing-like manner.

3. The self-sealing anti-drip loading telescopic vertical pipe for loading arms according to claim 2, characterized in that: The interior of the sealing block is hollow, forming a buoyancy cavity.

4. The self-sealing anti-drip loading telescopic vertical pipe for loading arms according to claim 1, characterized in that: The outer tube is coaxially fitted around the inner tube, with an annular gap forming between them. The bottom end of the outer tube is provided with an annular seal. When the inner tube is in the retracted state, the annular seal forms a sealing fit with the outer wall surface of the inner tube, thus sealing the annular gap.

5. The self-sealing anti-drip loading telescopic vertical pipe for loading arms according to claim 4, characterized in that: The annular seal includes an annular sealing seat for connection to the outer tube. The inner side of the annular sealing seat is provided with at least one annular groove, and an annular sealing ring is provided in the annular groove. The inner side of the annular sealing ring has an elastic sealing lip, which is used to abut against the outer wall of the bottom of the inner tube to form an interference seal fit.

6. The self-sealing anti-drip loading telescopic vertical pipe for loading arms according to claim 5, characterized in that: A discharge port is provided at the bottom of the inner tube. The inner diameter of the annular sealing ring is larger than the outer diameter of the inner tube at the location of the discharge port. The outer diameter of the inner tube located below the discharge port gradually increases from top to bottom, forming a gradually bulging sloping annular surface. The outer diameter of the sloping annular surface at its maximum is matched with the inner diameter of the annular sealing ring, and this point is used to fit against the sealing lip and form a sealing fit.

7. The self-sealing anti-drip loading telescopic vertical pipe for loading arms according to claim 2, characterized in that: The inner tube is also equipped with a pressure relief pipe. The air inlet of the pressure relief pipe is located at a preset height inside the inner pipe, and the pressure relief pipe passes through the sealing block and its exhaust end is connected to the outside.

8. The self-sealing anti-drip loading telescopic vertical pipe for loading arms according to claim 1, characterized in that: The outer tube is equipped with a locking cone, on which a groove with a tapered diameter is formed. The cross-section of the groove is a smoothly transitioning arc shape, and below the groove is a guide cone. The top of the inner tube is provided with an elastic locking structure for engaging with the slot. The elastic locking structure includes a locking pin, the rear of which is connected to an elastic pusher, and the front end of which is a ball head whose shape matches the cross-sectional trace of the slot.

9. The self-sealing anti-drip loading telescopic vertical pipe for loading arms according to claim 8, characterized in that: A suspension bracket is installed at a pre-set location inside the outer tube. The suspension bracket includes a first support ring, inside which a connecting rod is provided. The connecting rod has a threaded hole. The top of the locking cone is a lead screw, which is screwed into the threaded hole to be hoisted and fixed in the outer tube.

10. The self-sealing anti-drip loading telescopic vertical pipe for loading arms according to claim 8, characterized in that: The elastic locking structure further includes a second support ring, the interior of which is provided with a connecting frame. The connecting frame has a central hole, which is positioned opposite to the locking cone and is used for the locking cone to pass through. The connecting frame has a locking pin guide hole inside, which connects to the central hole and forms an opening on the side wall of the central hole. The locking pin is movably installed in the locking pin guide hole, and the ball head can extend from the opening and reach the central hole. The elastic pusher is a compression spring.

11. The self-sealing anti-drip loading telescopic vertical pipe for loading arms according to claim 10, characterized in that: The locking pin guide hole includes an outlet section and a guide section with an inner diameter larger than the outlet section. The locking pin includes a ball head and a limiting boss disposed at the rear of the ball head. The limiting boss is used to be disposed in the guide section, and the outer diameter of the limiting boss is adapted to the guide section and larger than the outlet section.

12. The self-sealing anti-drip loading telescopic vertical pipe for loading arms according to claim 10, characterized in that: It also includes an adjusting plug, one end of the compression spring being connected to the tail of the locking pin, and the other end being fixed to the adjusting plug. The tail section of the locking pin guide hole is an internal thread section, and the adjusting plug is screwed into the internal thread section.

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