Liquid storage tank bottom sediment sampler

Abstract

The invention discloses a sampler for sediment at the bottom of a liquid storage tank, and belongs to the technical field of petrochemical equipment. The sampler for the sediment at the bottom of the liquid storage tank comprises a counterweight base, a sampling sealing cap, a sampling tube and a locking assembly, the sampling sealing cap is arranged on the counterweight base, the sampling tube is detachably arranged on the counterweight base, and the sampling tube is embedded in the sampling sealing cap in a matched manner, so that opening and closing of a port in one side of the sampling tube are controlled through opening and closing of the sampling sealing cap; the locking assembly is connected between the sampling tube and the counterweight base so as to lock the sampling tube on the counterweight base or unlock the sampling tube from the locking base. The sampler for the sediment at the bottom of the liquid storage tank can stably obtain the sediment sample to a certain extent.

Description

Technical Field

[0001] The present application belongs to the technical field of petrochemical equipment, and in particular relates to a sediment sampler at the bottom of a liquid storage tank. Background Art

[0002] In the petrochemical industry, thicker sediments will gradually form at the bottom of large-capacity storage tanks that store liquid media such as crude oil. For reliable sampling and testing, it is usually necessary to collect a certain amount of sediment. For this purpose, sampling can be carried out by opening the pipeline in the storage tank or by lowering a sampler from the top of the tank.

[0003] However, the fluidity of the sediment at the bottom of the tank is not ideal, and the amount of samples released through the pipeline is very small, or even impossible to discharge, which is not conducive to the reliability of detection. The self-filling top-down sampler needs to use a traction rope or a rod. The sampler lowered by the rope is easily affected by the buoyancy of the liquid medium and often falls on the surface of the sediment layer, and the sediment excavated is limited; the sampler is lowered by the rod, which is usually long and heavy, and inconvenient to operate. Summary of the invention

[0004] The present application provides a liquid tank bottom sediment sampler, which aims to at least to some extent solve the technical problems of inconvenient sampling of bottom sediments in large tanks and unsatisfactory sampling volume.

[0005] The embodiment of the present application provides a liquid storage tank bottom sediment sampler, comprising: a weighted base, a sampling cap, a sampling tube, and a locking assembly;

[0006] The sampling sealing cap is arranged on the counterweight base, the sampling tube is detachably arranged on the counterweight base, and the sampling tube is matched and embedded in the sampling sealing cap, so that the opening and closing of a port on one side of the sampling tube can be controlled by opening and closing the sampling sealing cap;

[0007] The locking assembly is connected between the sampling tube and the counterweight base to lock the sampling tube on the counterweight base or unlock the sampling tube from the locking base.

[0008] In some embodiments, the counterweight base includes a seat body and a counterweight;

[0009] The counterweight is connected to the seat body, and the counterweight includes a variety of weight specifications;

[0010] The sampling sealing cap is connected to the seat body, and the locking assembly is connected between the seat body and the sampling tube.

[0011] In some embodiments, the seat body includes a plurality of supports, the plurality of supports are connected to the circumferential side wall of the sampling cap, and the locking assembly is connected between the plurality of supports and the sampling tube.

[0012] In some embodiments, the lower end surface of the support is formed into a conical surface.

[0013] In some embodiments, the sampling cap comprises: a barrel and a cover;

[0014] The cylinder is connected to the counterweight base, and the cover is hinged at the top port of the cylinder to close or open the top port of the cylinder by deflection.

[0015] In some embodiments, the sealing cover is in two pieces, and the two sealing covers are arranged opposite to each other at the mouth of the cylinder, so that the two sealing covers can be deflected and assembled to seal the mouth of the cylinder or deflected and separated to open the mouth of the cylinder.

[0016] In some embodiments, the locking assembly includes a locking pin, a pulling member, and a spring;

[0017] The locking pin is embedded in a pin hole opened on the counterweight base, the pull ring is connected to one end of the locking pin, and the spring abuts between the other end of the locking pin and the counterweight base to elastically push the locking pin to move toward the locking hole opened on the sampling tube and keep the locking pin in a state of being inserted in the locking hole.

[0018] In some embodiments, the pin hole is a stepped hole, and one end of the spring abuts against a stepped surface of the stepped hole.

[0019] In some embodiments, the liquid storage tank bottom sediment sampler further comprises a connecting piece and a sling;

[0020] The connecting piece is connected to the counterweight base, and the sling is connected to the connecting piece.

[0021] In some embodiments, the sling is an anti-static thick cotton rope with metal wire or a stainless steel wire rope.

[0022] The embodiments of the present application have at least the following beneficial effects:

[0023] The sediment sampler for the bottom of a liquid storage tank provided in the embodiment of the present application adopts a sampling tube as a sampling container, and deep sampling is achieved by inserting the sampling tube into the sediment layer to obtain a certain amount of sediment, thereby improving the comprehensiveness and reliability of sampling; and a counterweight base is provided to install and fix the sampling tube, thereby increasing the weight of the sampler as a whole, and using the larger deadweight to reduce the resistance of the liquid medium, so that it can fall into place at a certain speed and be inserted into a certain depth of the sediment layer, thereby stably obtaining the sediment sample; at the same time, the counterweight base can be installed to adjust the number and specifications of the counterweights, so that the counterweight can also be adjusted for different liquid media, thereby improving the stability and reliability of sampling. On the other hand, by using the sampling tube as a sampling container, it is also convenient to clean up after sampling, which is convenient to improve the efficiency of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of the structure of a sediment sampler at the bottom of a liquid storage tank in an embodiment of the present application is shown;

[0026] Figure 2 Shows Figure 1 Schematic diagram of the sampling cap opening state of the sediment sampler at the bottom of the liquid storage tank;

[0027] Figure 3 Shows Figure 1 Schematic diagram of the closed state of the sampling cap of the sediment sampler at the bottom of the liquid storage tank;

[0028] Figure 4 Shows Figure 1 A top view of

[0029] Figure 5 Shows Figure 1 A schematic diagram of the connection between a sampling sealing cap and a seat body of a sediment sampler at the bottom of a liquid storage tank;

[0030] Figure 6 Shows Figure 1 A schematic diagram of the structure of a support for a sediment sampler at the bottom of a liquid storage tank;

[0031] Figure 7 Shows Figure 1 A schematic diagram of the structure of a cylinder of a sampling cap of a sediment sampler at the bottom of a liquid storage tank;

[0032] Figure 8 Shows Figure 1 Schematic diagram of the structure of the cover body of the sampling cap of the liquid storage tank bottom sediment sampler.

[0033] Reference numerals:

[0034] 100-counterweight base, 110-base, 111-support, 111a-pin hole, 111a1-step table, 111b-installation plane, 111c-flow guide slope, 111d-conical surface, 120-counterweight, 121-flow guide wing plate, 130-head bolt;

[0035] 200-sampling sealing cap, 210-cylinder body, 211-mounting hole, 212-supporting ear, 220-sealing cover, 221-cover body, 222-hinged cylinder;

[0036] 300-sampling tube;

[0037] 400-locking assembly, 410-locking pin, 420-pulling member, 430-spring;

[0038] 500-connector;

[0039] 600 - Sling. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0041] In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those of ordinary skill in the art may recognize the application of other processes and / or the use of other materials.

[0042] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0043] Since the sediment at the bottom of large storage tanks is dense and has poor fluidity, it is impossible to sample by discharging it through the bottom pipeline. Instead, sampling is usually done by lowering a sampler from the top of the tank to dig and sample. However, the sampler is usually connected by a rod or a sling, and then lowered from the top. Among them, due to the high height of the tank body, the rod is long, which makes operation inconvenient; the sampler under the sling is greatly affected by the buoyancy and other resistance of the liquid medium, so that after the sampler is in place, it is only on the surface of the sediment layer and cannot obtain enough sediment samples, making the reliability of sampling and detection unsatisfactory.

[0044] To this end, an embodiment of the present application provides a liquid storage tank bottom sediment sampler, which reduces the influence of the liquid medium to a certain extent, stably obtains tank bottom sediment samples, and improves the reliability of the sampling operation.

[0045] Figure 1 The schematic diagram of the structure of the sediment sampler at the bottom of the liquid storage tank in the embodiment of the present application is shown; Figure 1 The liquid storage tank bottom sediment sampler provided in the embodiment of the present application can be lowered into the storage tank, overcome the resistance of the liquid medium to a certain extent, and inserted into the sediment layer to a certain depth, thereby comprehensively obtaining a certain amount of sediment samples.

[0046] The liquid storage tank bottom sediment sampler may include: a weighted base 100 , a sampling cap 200 , a sampling tube 300 , and a locking assembly 400 .

[0047] The sampling tube 300 can be detachably connected to the counterweight base 100 and the sampling cap 200 respectively. The sampling tube 300 and the counterweight base 100 are connected via the locking assembly 400 to achieve flexible locking and unlocking; the sampling cap 200 can be connected to the counterweight base 100.

[0048] Among them, the counterweight base 100 is the installation base of the sampler, which is used to install other components; and as a counterweight, it lifts the weight of the sampler as a whole to obtain a relatively larger falling gravity, and improves the ability of the sampler to break through the resistance of the liquid medium, so that the sampling tube 300 can be gradually accelerated during the falling process, and still maintain a certain speed when contacting the sediment layer, so that the sampling tube 300 can be inserted to a certain depth in the sediment layer to obtain sufficient sampling samples.

[0049] Considering that in different stages of the entire sampling process, the main contents in the sampling tube 300 are liquid medium and sediment respectively; specifically, during the lowering process of the sampling tube 300, the sampling tube 300 mainly contains liquid medium, which enters from the lower end of the sampling tube 300 and is discharged from the upper end. During this process, the fluidity of the sampling tube 300 should be maintained to avoid the formation of falling resistance; when the sampling tube 300 is inserted into the sediment layer and the upper body of the sampler is taken out of the sediment sample, the risk of the sediment sample detaching due to its own weight should be considered, and the top port of the sampling tube 300 can be closed to reduce the risk of the sample in the tube falling and detaching by maintaining the internal pressure of the sampling tube 300.

[0050] Therefore, the sampling sealing cap 200 is connected to one end of the sampling tube 300, and can be specifically arranged at the top of the sampling tube 300, and the sampling sealing cap 200 can be arranged as a sealing cap structure that can be flexibly opened and closed, so as to control the opening and closing of a port on one side of the sampling tube 300; thereby, the top port of the sampling tube 300 is opened during the falling process of the sampling tube 300, and when the sampling tube 300 carrying the sediment sample is lifted up, the sampling sealing cap 200 should close the top port of the sampling tube 300.

[0051] In order to facilitate the removal of the sediment sample in the sampling tube 300, the sampling tube 300 can be locked on the counterweight base 100 by the locking assembly 400. After the sampler is taken out, the locking assembly 400 is operated to unlock the sampling tube 300, and then the sampling tube 300 is removed to obtain the sediment sample; after cleaning the sampling tube 300, the sampling tube 300 can be reinstalled and locked on the counterweight base 100 by operating the locking assembly 400.

[0052] In some embodiments, the weight base 100 is used as a weight piece, and its specifications can be set to a series of weight-adjustable pieces of different weights, so that the weight can be selected according to different liquid media in the storage tank to ensure the sampling volume.

[0053] In some embodiments, the counterweight base 100 can be configured as a combination structure of a base body 110 and a counterweight 120 , that is, the base body 110 serves as a mounting structure for the counterweight 120 , and can also serve as a mounting structure for the sampling cap 200 , the sampling tube 300 , and the locking assembly 400 .

[0054] Correspondingly, the counterweight 120 may be composed of a plurality of counterweight elements that are set as standard parts, and the number of the counterweight elements in the counterweight 120 may be selected according to actual needs to meet the requirements of different liquid medium storage tanks.

[0055] Generally speaking, when the viscosity and density of the liquid medium are relatively high, a larger number of counterweight elements can be selected to make the overall weight of the counterweight 120 larger, so that it can have greater gravity to break through the resistance of the liquid medium, so that the sampling tube 300 can be stably inserted into the sediment layer to a certain depth to ensure the sampling amount.

[0056] In some embodiments, the counterweight 120 can be fixed to the base body 110 by a head bolt 130 or other fasteners; accordingly, corresponding bolt holes can be opened on the counterweight 120. When multiple counterweights are configured, the multiple counterweights 120 can be stacked and then pressed and locked on the base body 110 by a head bolt.

[0057] Figure 4 Shows Figure 1 top view of; see Figure 1 and Figure 4 In some embodiments, in order to maintain the stability of the falling posture, a wing plate 121 may be provided on the circumferential side of the counterweight 120 to form a flow guide structure.

[0058] When the counterweight 120 is a combination of a plurality of counterweight elements stacked together, the wing plate 121 may be disposed on the topmost counterweight element.

[0059] Figure 5 Shows Figure 1 A schematic diagram of the connection between a sampling sealing cap and a seat body of a sediment sampler at the bottom of a liquid storage tank; Figure 6 Shows Figure 1 Schematic diagram of the structure of the support of the sediment sampler at the bottom of the liquid storage tank.

[0060] See also Figure 5 and Figure 6 In some embodiments, the seat body 110 can be set as a combination structure of multiple independent supports 111, and the multiple supports 111 are arranged around the circumferential side of the sampling cap 200 and independently connected to the sampling cap 200; accordingly, the sampling tube 300 is also correspondingly arranged in the central area surrounded by the multiple supports 111; so that during the falling process, the liquid medium in the storage tank can pass through the gaps between the sampling tube 300, the sampling cap 200 and the multiple supports 111, thereby forming a stable material flow, maintaining the overall force balance of the sampler, reducing tilting and shaking, and maintaining the stability of its falling posture.

[0061] On the other hand, by forming a stable material flow of the liquid medium, the overall permeability of the sampler can be improved, the resistance can be reduced, the descent speed can be improved, and the embedding depth of the sampling tube 300 can be ensured.

[0062] The locking members 400 may be correspondingly disposed on the plurality of supports 111 to lock the sampling tube 300 on the supports 111 .

[0063] In some embodiments, in order to improve the passability of the support 111 and reduce the falling resistance, the lower end of the support 111 can be opened into a conical surface 111d.

[0064] Figure 3 Shows Figure 1 Schematic diagram of the closed state of the sampling cap of the sediment sampler at the bottom of the liquid storage tank; Figure 7 Shows Figure 1 Schematic diagram of the structure of the cylinder of the sampling cap of the bottom sediment sampler of the liquid storage tank.

[0065] See also Figure 3 , Figure 6 and Figure 7 In some embodiments, the locking assembly 400 may include a locking pin 410 , a pulling member 420 , and a spring 430 .

[0066] A pin hole 111a is provided on the counterweight base 100, and can be specifically arranged on the support 111. The locking pin 410 can be movably arranged in the pin hole 111a. The spring 430 abuts against one end of the locking pin 410 and the counterweight base 100 or can specifically abut against the support 111. The spring 430 pushes the locking pin 410 to move toward the locking hole provided on the sampling tube 300, so that the locking pin 410 passes through the locking hole provided on the sampling tube 300 to lock the sampling tube 300.

[0067] The pulling member 420 may be fixed to the other end of the locking pin 410 to pull the locking pin 410 .

[0068] Generally speaking, the pulling member 420 can be connected to the side of the support 111 away from the sampling tube 300, and the spring 430 can be compressed between the end of the locking pin 410 close to the sampling tube 300 and the support 111, so that the locking pin 410 can be stably installed on the support 111, and the pulling member 420 can be pulled to compress the spring 430 and retract the locking pin 410 into the pin hole 111a, thereby releasing the sampling tube 300 and achieving unlocking.

[0069] Alternatively, the pulling member 420 may be released, so that under the push of the compressed spring 430, the locking pin 410 moves toward the locking hole on the sampling tube 300 and finally passes through the locking hole to complete the locking operation.

[0070] In some embodiments, the pin hole 111a can be set as a stepped hole, and the spring 430 can be set as a coil spring, which is sleeved on the pin shaft 410, and the coil spring can be set in the stepped hole, and specifically one end of the spring 430 can be abutted against the stepped table 111a1 of the stepped hole, so as to constrain and protect the spring 430.

[0071] See also Figure 1 and Figure 4 In some embodiments, the number of the supports 111 may be two, which are symmetrically arranged on both sides of the sampling cap 200 and the sampling tube 300 .

[0072] Figure 2 Shows Figure 1 Schematic diagram of the sampling cap opening state of the sediment sampler at the bottom of the liquid storage tank; Figure 3 Shows Figure 1 Schematic diagram of the closed state of the sampling cap of the sediment sampler at the bottom of the liquid storage tank.

[0073] See also Figure 2 and Figure 3 In some embodiments, the sampling cap 200 is configured as a combination structure of a cylinder 210 and a cover 220 , and the cover 220 is hinged at the top mouth of the cylinder 210 to deflect, block or open the mouth of the cylinder 210 .

[0074] When the sampling tube 300 is embedded in the cylinder 210 , the port of the sampling tube 300 can be closed and opened by deflecting the cover 220 .

[0075] Figure 7 Shows Figure 1 A schematic diagram of the structure of a cylinder of a sampling cap of a sediment sampler at the bottom of a liquid storage tank; Figure 8 Shows Figure 1 Schematic diagram of the structure of the cover body of the sampling cap of the liquid storage tank bottom sediment sampler.

[0076] See also Figure 7 and Figure 8 In some embodiments, a mounting hole 211 may be opened on the wall of the cylinder body 210 to facilitate the locking pin 410 to pass through and be inserted into the locking hole on the sampling tube 300 .

[0077] A support ear 212 with a hole may also be provided on the top of the cylinder 210 to facilitate hinged connection with the cover 220 .

[0078] In coordination, the cover 220 may include a cover body 221 , and a hinge cylinder 222 is provided on one side of the cover body 221 to cooperate with a hinge pin to be hinged with the support ear 212 .

[0079] In some embodiments, the sealing cover 220 can be provided in plurality and deflected and assembled into a large sealing cover structure to close the cylinder 210 or open the cylinder 210 .

[0080] See also Figure 6 In some embodiments, the side of the support 111 close to the sampling cap 200 can be opened into a plane, namely, the installation plane 111b, and the cylinder 210 can be set as a square cylinder so as to match and install it on the support 111.

[0081] In some embodiments, the upper side of the side surface of the support 111 close to the sampling cap 200 can also be set as a guide slope 111c, and the guide slope 111c is inclined toward the sampling cap 200, so that the liquid medium flowing out of the sampling cap 200 can be gathered to the middle, thereby forming a high-speed material flow, which can accelerate the sampler to fall to a certain extent.

[0082] See also Figure 1 and Figure 4 In some embodiments, in order to facilitate the lowering of the sampler, a connecting piece 500 may be provided on the top of the counterweight base 100 , and a matching sling 600 may be provided and connected to the connecting piece 500 .

[0083] When the sampling operation is performed, the suspension rope 600 can be pulled, and then the sampler can be thrown down and allowed to fall freely until it reaches the bottom and is inserted into the sediment layer, and part of the sediment enters the sampling tube 300. During the descent, the cover 220 is deflected and raised under the impact of the liquid medium flow, and the sampling cover 200 is opened.

[0084] After the sampler is in place, the cover 220 is reset and blocks the cylinder 210 under the action of gravity, thereby closing the port of the sampling tube 300, so as to block the two ends of the sampling tube 300 with the sediment in the tube cavity to form a chamber to maintain a certain internal pressure; thereby, the sampler can be slowly pulled up, and under the action of the internal pressure, the sediment can be stably maintained in the sampling tube 300.

[0085] The embodiments of the present application have at least the following beneficial effects:

[0086] The sediment sampler for the bottom of a liquid storage tank provided in the embodiment of the present application adopts a sampling tube as a sampling container, and deep sampling is achieved by inserting the sampling tube into the sediment layer to obtain a certain amount of sediment, thereby improving the comprehensiveness and reliability of sampling; and a counterweight base is provided to install and fix the sampling tube, thereby increasing the weight of the sampler as a whole, and using the larger deadweight to reduce the resistance of the liquid medium, so that it can fall into place at a certain speed and be inserted into a certain depth of the sediment layer, thereby stably obtaining the sediment sample; at the same time, the counterweight base can be installed to adjust the number and specifications of the counterweights, so that the counterweight can also be adjusted for different liquid media, thereby improving the stability and reliability of sampling. On the other hand, by using the sampling tube as a sampling container, it is also convenient to clean up after sampling, which is convenient to improve the efficiency of use.

[0087] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0088] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0089] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0090] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0091] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0093] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0094] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A liquid storage tank bottom sediment sampler, characterized in that: include: Weighted base, sampling cap, sampling tube and locking assembly; The sampling sealing cap is arranged on the counterweight base, the sampling tube is detachably arranged on the counterweight base, and the sampling tube is matched and embedded in the sampling sealing cap, so that the opening and closing of a port on one side of the sampling tube can be controlled by opening and closing the sampling sealing cap; The locking assembly is connected between the sampling tube and the counterweight base to lock the sampling tube on the counterweight base or unlock the sampling tube from the locking base.

2. The liquid storage tank bottom sediment sampler according to claim 1, characterized in that: The counterweight base includes a base body and a counterweight; The counterweight is connected to the seat body, and the counterweight includes a variety of weight specifications; The sampling sealing cap is connected to the seat body, and the locking assembly is connected between the seat body and the sampling tube.

3. The liquid storage tank bottom sediment sampler according to claim 2, characterized in that: The seat body comprises a plurality of supports, the plurality of supports are connected to the circumferential side wall of the sampling sealing cap, and the locking assembly is connected between the plurality of supports and the sampling tube.

4. The liquid storage tank bottom sediment sampler according to claim 3, characterized in that: The lower end surface of the support is formed into a conical surface.

5. The liquid storage tank bottom sediment sampler according to claim 1, characterized in that: The sampling cap comprises: a cylinder and a sealing cover; The cylinder is connected to the counterweight base, and the cover is hinged at the top port of the cylinder to close or open the top port of the cylinder by deflection.

6. The liquid storage tank bottom sediment sampler according to claim 5, characterized in that: The sealing cover is composed of two pieces, and the two sealing covers are arranged oppositely at the barrel opening of the barrel, so that the two sealing covers can be deflected and assembled to seal the barrel opening of the barrel, or deflected and separated to open the barrel opening of the barrel.

7. The liquid storage tank bottom sediment sampler according to claim 1, characterized in that: The locking assembly includes a locking pin, a pulling member and a spring; The locking pin is embedded in a pin hole opened on the counterweight base, the pull ring is connected to one end of the locking pin, and the spring abuts between the other end of the locking pin and the counterweight base to elastically push the locking pin to move toward the locking hole opened on the sampling tube and keep the locking pin in a state of being inserted in the locking hole.

8. The liquid storage tank bottom sediment sampler according to claim 7, characterized in that: The pin hole is a stepped hole, and one end of the spring abuts against a stepped surface of the stepped hole.

9. The liquid storage tank bottom sediment sampler according to any one of claims 1 to 8, characterized in that: The liquid storage tank bottom sediment sampler also includes a connecting piece and a sling; The connecting piece is connected to the counterweight base, and the sling is connected to the connecting piece.

10. The liquid storage tank bottom sediment sampler according to claim 9, characterized in that: The sling is an anti-static thick cotton rope with metal wire or a stainless steel wire rope.

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