CN215437962U

CN215437962U - Nitrogen-sealed storage tank combining locking valve and closed metering sampling equipment

Info

Publication number: CN215437962U
Application number: CN202121640722.5U
Authority: CN
Inventors: 李德新; 郑雯; 姜秀秀; 胡锡明; 张惠强; 徐承甫; 童庆中; 顾曙斌; 何江波; 钱春燕
Original assignee: Zhejiang Petroleum and Chemical Co Ltd
Current assignee: Zhejiang Petroleum and Chemical Co Ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2022-01-07
Anticipated expiration: 2031-07-19

Abstract

The utility model discloses a nitrogen-sealed storage tank combining a locking valve and closed metering sampling equipment, which comprises a nitrogen-sealed storage tank, wherein the nitrogen-sealed storage tank comprises a storage tank main body, a nitrogen-sealed system, a guide pipe, a locking valve and a closed metering sampling equipment connecting device; the top end surface of the storage tank main body is provided with a metering port, the upper end of the guide pipe penetrates through the metering port and is in sealing connection with the metering port, the lower end of the guide pipe extends into the storage tank main body and is connected with the storage tank main body, the bottom of the guide pipe is sealed, a plurality of holes are uniformly formed in the side wall of the guide pipe, the top end of the guide pipe is provided with a first flange and a second flange, the second flange is provided with threads, the guide pipe is connected with the locking valve through the threads of the second flange, and the upper end of the locking valve is connected with a closed metering sampling equipment connecting device.

Description

Nitrogen-sealed storage tank combining locking valve and closed metering sampling equipment

Technical Field

The utility model relates to a nitrogen-sealed storage tank, in particular to a nitrogen-sealed storage tank combining a locking valve and closed metering sampling equipment, and belongs to the field of equipment in the petroleum and petrochemical industry.

Background

The nitrogen-sealed storage tank is a storage tank with pressure regulated by a self-operated regulating valve, wherein the pressure of the storage tank is lower than a set value, the self-operated regulating valve automatically supplements nitrogen, the nitrogen supplementation is stopped when the pressure of the storage tank is higher than the set value, so that the tank pressure is kept stable by the nitrogen, a guide pipe is arranged on the tank top of the existing nitrogen-sealed storage tank, a metering cover plate is arranged on the guide pipe, and the metering cover plate is opened for pressure relief during tank top metering/sampling. Typically, nitrogen-sealed tanks are metered by a level meter, sampling is performed by an under-tank auto-sampler, but nitrogen-sealed tanks require top-of-tank metering/sampling in several ways: firstly, when a product storage tank for trade handover is involved, a liquid level meter needs to be checked regularly, and a tank top check ruler needs to be used for metering; secondly, when the storage tank of the export product is involved, customs requirements need to go to a tank inspection ruler to measure a front ruler/a rear ruler, and a tank top is required to sample; third, when involving tank bottoms automatic sampler trouble, need tank deck sampling, above operation all need be through measurement mouth pressure release, causes nitrogen gas waste and environmental pollution, and the storage tank has oxygen, moisture etc. to get into simultaneously, can lead to the product to take place the physical chemistry and change the influence quality, has improved the security that the product was stored.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the pressure of the existing nitrogen-sealed storage tank must be relieved through a metering port under the condition of metering/sampling of the tank top, the utility model provides a nitrogen-sealed storage tank combining a locking valve and a closed metering and sampling device.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

a nitrogen-sealed storage tank combining a locking valve and a closed metering sampling device comprises the nitrogen-sealed storage tank, wherein the nitrogen-sealed storage tank comprises a storage tank main body, a nitrogen-sealed system, a guide pipe, the locking valve and a closed metering sampling device connecting device; the storage tank is characterized in that a metering port is formed in the end face of the top of the storage tank body, the upper end of the guide pipe penetrates through the metering port and is in sealing connection with the metering port, the lower end of the guide pipe extends into the storage tank body and is connected with the storage tank body, a plurality of holes are uniformly formed in the bottom sealing part and the side wall of the guide pipe, a first flange and a second flange are arranged on the top end of the guide pipe, the second flange is provided with threads, the guide pipe is in threaded connection with the locking valve through the second flange, and the upper end of the locking valve is connected with a closed metering sampling device connecting device.

Preferably, the latching valve comprises a valve rod, a valve cover group, a handle, a latching valve shell with a cavity and a ball with a through hole, the ball is arranged inside the latching valve shell, the valve cover group is installed at the top end of the latching valve shell, one end of the valve rod penetrates through the latching valve shell and is connected with the ball, the other end of the valve rod is connected with the handle, and the valve rod drives the ball to rotate through the handle to realize the communication and isolation of the upper end and the lower end of the latching valve shell.

Preferably, closed measurement sampling equipment connecting device includes protective shroud and protection tube and the quick connecting device who is connected with the protection tube, quick connecting device includes two claws at least, the latching valve top is provided with the draw-in groove, and the draw-in groove upper end is provided with protruding structure, the claw can block in the draw-in groove of the upper end of latching valve, the protective shroud has the internal thread, be equipped with the external screw thread on the protection tube, the protective shroud cover is located on the protective shroud and can with protection tube threaded connection.

Preferably, nitrogen is sealed the headtotail on the top end face of storage tank main part, nitrogen is sealed the system and is included the pipeline No. one, be connected with stop valve, No. two stop valves on the pipeline No. one, be connected with the control valve between stop valve, No. two, be connected with the pipeline No. two between stop valve entrance point and No. two stop valve exit ends, still be connected with No. three stop valves on being close to the pipeline of No. two stop valve exit ends departments, be connected with two stop valves No. four on No. two pipelines at least.

Preferably, the bottom end of the guide pipe is provided with a fixed support ring, and the fixed support ring is fixedly connected with a support plate fixed on the storage tank main body.

Preferably, the lower end of the guide pipe is connected with the fixed support ring through a set screw and a nut.

Preferably, a plurality of holes are uniformly formed in the side wall of the guide pipe from top to bottom.

Has the advantages that: the utility model utilizes the quick connection function of the locking valve to connect the closed metering/sampling equipment and the storage tank, thereby realizing the metering/sampling of the tank top of the nitrogen-sealed storage tank under the condition of complete closure.

The utility model carries out tank top metering/sampling under the condition of complete sealing, pressure relief through a metering port is not needed, nitrogen and product gas phase in the tank are not discharged to the atmospheric environment, the loss of the nitrogen is reduced, the pollution to the environment caused by the discharge of the product gas phase to the atmosphere is avoided, and the harm to the health of operators is reduced.

The utility model carries out tank top metering/sampling under the condition of complete sealing, does not need to release pressure through a metering port, keeps the pressure state in the tank, avoids oxygen, moisture and the like in the air from entering the storage tank to influence the product quality, simultaneously prevents the oxygen and the product gas phase from forming explosive mixed gas, and improves the safety of product storage.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Figure 2 is a schematic cross-sectional view of a latching valve of the present invention.

Fig. 3 is a schematic structural diagram of the connecting device of the closed metering sampling device of the utility model.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "connected", and the like are to be construed broadly, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; may be mechanically coupled, may be directly coupled, or may be indirectly coupled through an intermediary. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 1-3 show an embodiment of a nitrogen-sealed storage tank using a combination of a locking valve and a closed metering sampling device, which includes a nitrogen-sealed storage tank including a tank body 11, a nitrogen sealing system 10, a guide pipe 5, a locking valve 9, and a closed metering sampling device connection device 6; be equipped with the measurement mouth on the 11 top end faces of storage tank main part, 5 upper ends of stand pipe pass the measurement mouth and stand pipe 5 and measurement mouth department sealing connection, the lower extreme of stand pipe 5 stretches into in the storage tank main part 11 and is connected with storage tank main part 11, evenly open on 5 bottom seal of stand pipe and the lateral wall has a plurality of holes, 5 tops of stand pipe are provided with flange 7 and No. two flanges 8, No. two flanges 8 have the screw thread, 5 and the locking valve 9 are through the threaded connection of No. two flanges 8, locking valve 9 upper end is connected closed measurement sampling equipment connecting device 6.

As shown in figure 1, the nitrogen-sealed storage tank comprises a storage tank body 11, a nitrogen sealing system 10, a guide pipe 5, a locking valve 9 and a closed metering/sampling device connecting device 6, wherein the nitrogen sealing system 10 is fixed on the top end face of the storage tank body 11, a metering opening is further arranged on the top end face of the storage tank body 11, the upper end of the guide pipe 5 penetrates through the metering opening and is fixedly connected with the storage tank body 11, a fixed support ring 4 is arranged at the bottom end of the guide pipe 5 (the lower end of the guide pipe 5 is connected with the fixed support ring 4 through a set screw 2 and a nut 3), the fixed support ring 4 is fixedly connected with a support plate 1 fixed on the storage tank body 11, a plurality of holes are uniformly formed in the side wall of the guide pipe 5, a flange 7 and a flange 8 are arranged at the top end of the guide pipe 5, wherein the flange 8 is provided with threads, the guide pipe 5 is in threaded connection with the locking valve 9 through the flange 8, as shown in figure 2, and the locking valve 9 comprises a ball 13, A valve rod 15, a valve cover group 16 and a handle 17, wherein, a ball 13 is arranged inside the locking valve 9, the handle 17 is arranged outside the locking valve 9, the valve cover group 16 is arranged at the vertical axial top end of the locking valve 9, two ends of the valve rod 15 are respectively fixedly connected with the handle 17 and the ball 13, the valve rod 15 drives the ball 13 to rotate along the axis thereof through the handle 17, the handle 17 drives the valve rod 15 to rotate, the valve rod 15 drives the ball 13 to rotate along the water skin axis, thereby achieving the purpose of opening and closing the ball valve, the top end of the locking valve 9 is provided with a clamping groove, the upper end of the clamping groove is provided with a bulge structure, the locking valve 9 is connected with a closed metering/sampling device connecting device 6, as shown in figure 3, the closed metering/sampling device connecting device 6 comprises a quick connecting device 18, a protective ring 19 and a protective tube 20, the quick connecting device 18 is provided with two claws which can be placed into the clamping groove, the claws can be clamped in the clamping groove at the upper end of the locking valve 9, one side of the protection tube 20, which is attached to the upper end of the clamping groove, is provided with a groove structure matched with the convex structure and is provided with an external thread, the convex structure at the upper end of the clamping groove of the locking valve 9 is matched with a groove of the protection tube 20, and the retainer ring 19 is provided with an internal thread and can be connected with the protection tube 20 in a threaded mode.

The operation steps of tank top metering/sampling by using the novel nitrogen-sealed storage tank with the 'locking valve + closed metering/sampling device' are as follows: by adopting the structure, when the tank top is measured/sampled, the valve cover group 16 at the upper part of the locking valve 9 is opened, two claws of the quick connecting device 18 of the closed measuring/sampling device are oppositely placed in the clamping groove at the upper end of the locking valve 9, the locking valve 9 is opened, the locking ring 19 is fixedly connected through threads, the pre-fixing is realized, the electrostatic grounding clamp is correctly connected, the locking valve 19 is opened, the locking ring 19 is not connected with the protection pipe 20, the tape sensor probe is put down, when the sensor probe descends, the protection pipe 20 (the length of the protection pipe 20 is designed according to requirements) descends along with the sensor probe due to the gravity effect, the protection pipe 20 prevents the ball valve from being closed (the protection pipe 20 is arranged in the through hole of the ball 13 and cannot rotate the ball 13), finally, the protection pipe 20 completely enters the guide pipe 5, an independent side amount range is circled in the guide pipe 5 (preferably, the protection pipe 20 is attached to the inner wall of the guide pipe 5, shielding all holes on the guide tube 5), when the measuring tape is rolled up, the protection tube 20 is kept still until the measuring tape is pushed upwards by the sensor probe, after the detector of the metering/sampling device is completely withdrawn, the metering/sampling work is finished, the protection tube 20 is extended, the locking valve 9 is closed, the electrostatic grounding clamp is removed, the closed metering/sampling device is removed, the valve cover group 16 on the upper part of the locking valve is closed, and the tank top metering/sampling of the nitrogen-sealed storage tank under the condition of complete closing is realized.

In a preferred embodiment, the latching valve 9 includes a valve stem 15, a valve cap set 16, a handle 17, a latching valve housing with a cavity, and a ball 13 with a through hole, the ball 13 is disposed inside the latching valve housing, the valve cap set 16 is mounted on the top end of the latching valve housing, one end of the valve stem 15 penetrates through the latching valve housing and is connected with the ball 13, the other end of the valve stem 15 is connected with the handle 17, the valve stem 15 rotates the ball 13 through the handle 17 to achieve communication and isolation of the cavity inside the latching valve housing, and the inner wall of the lower end of the latching valve housing is also provided with threads and is directly connected with the guide pipe 5.

A preferred embodiment mode, closed measurement sampling equipment connecting device 6 includes protective shroud 19 and protection tube 20 and the quick connecting device 18 of being connected with protection tube 20, quick connecting device 18 includes two claws at least, locking valve 9 top is provided with the draw-in groove, and the draw-in groove upper end is provided with protruding structure, the claw can block in the draw-in groove of the upper end of locking valve 9, protective shroud 19 has the internal thread, be equipped with the external screw thread on the protection tube 20, protective shroud 19 cover is located on the protection tube 20 and can be with protection tube 20 threaded connection, one side of protection tube 20 and the laminating of draw-in groove upper end can also be equipped with groove structure, protruding structure and the groove structure of protection tube 20 of draw-in groove upper end cooperate, and there is protruding structure and the recess of protection tube to correspond on the draw-in groove, is convenient for ensure to aim at.

An embodiment mode of preferred, nitrogen system 10 is connected on the terminal surface of the top of storage tank main part 11, nitrogen system 10 includes the pipeline No. one, be connected with stop valve, No. two stop valves on the pipeline, be connected with the control valve between stop valve, No. two stop valves, be connected with the pipeline No. two between stop valve entrance point and No. two stop valve outlet ends, still be connected with the stop valve No. three on being close to the pipeline of No. two stop valve outlet ends departments, be connected with two stop valves No. four on No. two pipelines at least.

In a preferred embodiment, the bottom end of the guide tube 5 is provided with a fixed support ring 4, and the fixed support ring 4 is fixedly connected with the support plate 1 fixed on the storage tank main body 11.

In a preferred embodiment, the lower end of the guide tube 5 is connected with the fixed support ring 4 through the set screw 2 and the nut 3.

In a preferred embodiment, a plurality of holes are uniformly formed on the side wall of the guide tube 5 from top to bottom.

Finally, it should be noted that the present invention is not limited to the above embodiments, and many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the utility model.

Claims

1. A nitrogen-sealed storage tank combining a locking valve and a closed metering sampling device comprises the nitrogen-sealed storage tank, and is characterized in that: the nitrogen-sealed storage tank comprises a storage tank main body (11), a nitrogen-sealed system (10), a guide pipe (5), a locking valve (9) and a closed metering sampling device connecting device (6); be equipped with the measurement mouth on storage tank main part (11) top end face, the measurement mouth is passed and stand pipe (5) and measurement mouth department sealing connection to stand pipe (5) upper end, the lower extreme of stand pipe (5) stretches into in storage tank main part (11) and is connected with storage tank main part (11), evenly open on stand pipe (5) bottom seal and the lateral wall has a plurality of holes, stand pipe (5) top is provided with flange (7) and No. two flange (8), No. two flange (8) have the screw thread, stand pipe (5) and lock valve (9) are through the threaded connection of No. two flange (8), closed measurement sampling equipment connecting device (6) are connected to lock valve (9) upper end.

2. A nitrogen-sealed storage tank employing a combination of a latching valve and a closed metering sampling device as claimed in claim 1, wherein: the locking valve (9) comprises a valve rod (15), a valve cover group (16), a handle (17), a locking valve shell with a cavity and a ball body (13) with a through hole, wherein the ball body (13) is arranged inside the locking valve shell, the valve cover group (16) is installed at the top end of the locking valve shell, one end of the valve rod (15) penetrates through the locking valve shell and is connected with the ball body (13), the other end of the valve rod (15) is connected with the handle (17), and the valve rod (15) drives the ball body (13) to rotate through the handle (17) so that the upper end and the lower end of the locking valve shell can be communicated and isolated.

3. A nitrogen-sealed tank employing a combination of a latching valve and a closed metering sampling device as claimed in claim 1 or 2, wherein: closed measurement sampling equipment connecting device (6) include protective shroud (19) and protection tube (20), quick connecting device (18), protective shroud (19) all overlap locate protection tube (20) on, quick connecting device (18) include two claws at least, latching valve (9) top is provided with the draw-in groove, and the draw-in groove upper end is provided with protruding structure, the claw can block in the draw-in groove of the upper end of latching valve (9), protective shroud (19) have the internal thread, be equipped with the external screw thread on protection tube (20), protective shroud (19) can with protection tube (20) threaded connection.

4. A nitrogen-sealed storage tank employing a combination of a latching valve and a closed metering sampling device as claimed in claim 1, wherein: the nitrogen sealing system (10) is connected on the top end face of the storage tank main body (11), the nitrogen sealing system (10) comprises a pipeline, a stop valve and two stop valves are connected on the pipeline, a control valve is connected between the stop valve and the two stop valves, a pipeline is connected between the inlet end of the stop valve and the outlet end of the two stop valves, a pipeline close to the outlet end of the two stop valves is further connected with three stop valves, and at least two stop valves are connected on the pipeline.

5. A nitrogen-sealed storage tank employing a combination of a latching valve and a closed metering sampling device as claimed in claim 1, wherein: the bottom of stand pipe (5) is provided with fixed support ring (4), fixed support ring (4) and backup pad (1) fixed on storage tank main part (11) fixed connection.

6. A nitrogen-sealed storage tank employing a combination of a latching valve and a closed metering sampling device as claimed in claim 5, wherein: the lower end of the guide pipe (5) is connected with the fixed support ring (4) through a set screw (2) and a nut (3).

7. A nitrogen-sealed storage tank employing a combination of a latching valve and a closed metering sampling device as claimed in claim 1, wherein: a plurality of holes are uniformly formed on the side wall of the guide pipe (5) from top to bottom.