Liquid sampling device and flow battery energy storage system

Abstract

The utility model provides a liquid sampling device and a flow battery energy storage system. The liquid sampling device comprises a sampling connecting part and a liquid flow battery energy storage part, the sampling body is of a long cylindrical structure and is provided with a through hollow part; the valve body comprises a sealing body and a selection shaft, the sealing body is located in the hollow part of the sampling body, the sealing body is provided with a through part, and the first end of the selection shaft is fixedly connected with a non-through area of the sealing body; the piston mechanism comprises a plug and a pull rod, and the pull rod is fixedly connected with the second end of the plug; wherein the plug is arranged in the hollow part of the sampling body, is in contact with the interior of the hollow part, and can move in the hollow part under the push-pull action of the pull rod; the second end of the sampling connecting part sleeves the first end of the sampling body; the sampling body further comprises a mounting hole penetrating through the side wall of the long-barrel-shaped structure, and the selection shaft penetrates through the mounting hole and extends to the outer part of the side wall of the long-barrel-shaped structure; the diameter of the through part of the sealing body is larger than or equal to that of the plug.

Description

Technical Field

[0001] The utility model mainly relates to the field of liquid sampling and analysis, and in particular to a liquid sampling device and a liquid flow battery energy storage system. Background Art

[0002] During the operation of a liquid flow battery energy storage system, such as an all-vanadium liquid flow battery energy storage system, it is necessary to monitor the vanadium ion concentration of the positive and negative electrolytes in real time. The usual practice is to sample the electrolyte in the liquid flow battery energy storage system online and then perform chemical analysis on the components in the electrolyte.

[0003] However, there is no suitable online electrolyte sampling device at present, and the electrolyte sampling environment is often exposed to the air. Different gas components in the air will have a negative impact on the electrolyte sample. Especially in the all-vanadium liquid flow battery system, the components of the negative electrode electrolyte cannot be sampled. The divalent vanadium ions in the negative electrode electrolyte are easily oxidized when exposed to air. It is impossible to obtain the actual situation of electrolyte charging and discharging, titration test electrolyte state, actual utilization rate of electrolyte, and test electrolyte attenuation. Therefore, it can only rely on theoretical calculations, which do not fit the actual situation. Therefore, it is a problem that needs to be solved to provide a liquid sampling device and a liquid flow energy storage system to realize real-time and effective sampling of electrolyte during the operation of the liquid flow battery energy storage system. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a liquid sampling device and a liquid flow battery energy storage system, so as to realize real-time sampling of electrolyte during the operation of the liquid flow battery energy storage system and ensure the sampling quality of the electrolyte.

[0005] In order to solve the above technical problems, the utility model provides a liquid sampling device, comprising: a sampling connection part; a sampling body, the sampling body is a long cylindrical structure and has a through hollow part; a valve body, comprising a sealing body and a selection shaft, the sealing body is located in the hollow part of the sampling body, the sealing body has a through part, and the first end of the selection shaft is fixedly connected to the non-through area of ​​the sealing body; a piston mechanism, comprising a plug and a pull rod, the pull rod is fixedly connected to the second end of the plug; wherein the plug is installed in the hollow part of the sampling body and contacts with the inside of the hollow part, and can move in the hollow part under the push and pull action of the pull rod; the second end of the sampling connection part is sleeved on the first end of the sampling body; the sampling body also includes a mounting hole passing through the side wall of the long cylindrical structure, the selection shaft passes through the mounting hole and extends to the outside of the side wall of the long cylindrical structure; the diameter of the through part of the sealing body is greater than or equal to the diameter of the plug.

[0006] In an embodiment of the present invention, the sampling connection portion further includes a second hollow structure, and the second hollow structure is integrally connected with the hollow portion of the sampling body and has the same inner diameter.

[0007] In an embodiment of the present utility model, the valve body further includes a handle body, and the handle body is fixedly connected to the second end of the selection shaft.

[0008] In an embodiment of the present invention, a bayonet structure is further installed at the second end of the sampling body to lock the plug so that the plug does not fall out of the hollow portion of the sampling body.

[0009] In one embodiment of the present invention, a sealing plug is further installed at the first end of the plug, and the diameter of the sealing plug is larger than the diameter of the plug; the sealing plug is made of elastic material.

[0010] In an embodiment of the present invention, a sealing ring is further provided around the outer periphery of the plug; and the sealing plug is made of elastic material.

[0011] In one embodiment of the present invention, the end surface of the first end of the sampling body has a recessed portion, and a second sealing ring is provided in the recessed portion; the end surface of the second end of the sampling connection portion contacts the second sealing ring.

[0012] In an embodiment of the present invention, a pull ring structure is provided at the tail of the pull rod, and the diameter of the pull ring structure is greater than the diameter of the pull rod.

[0013] In one embodiment of the utility model, the sampling body further comprises an extension hole structure provided outside the side wall of the long cylindrical structure, the mounting hole and the extension hole structure are integrally connected; the selection shaft passes through the mounting hole and the extension hole structure.

[0014] In an embodiment of the present invention, the front end of the sampling connection portion further includes an extended contact portion, the extended contact portion is fixedly connected to the first end of the second hollow structure, and the inner diameter of the extended contact portion is greater than the inner diameter of the second hollow structure.

[0015] The utility model also provides a liquid flow battery energy storage system, comprising a liquid sampling device and a ball valve as described in any of the preceding items, wherein the ball valve is installed on an operating pipeline of the liquid flow battery energy storage system; an extended contact portion of a sampling connection portion of the liquid sampling device is connected to an output interface of the ball valve to implement sampling of electrolyte in the operating pipeline of the liquid flow battery energy storage system.

[0016] Compared with the prior art, the utility model has the following advantages: the liquid sampling device and liquid flow battery energy storage system of the present application can realize real-time and high-quality sampling of the electrolyte during the operation of the liquid flow battery energy storage system, so as to facilitate the accuracy of subsequent chemical analysis of the electrolyte. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are provided to provide a further understanding of the present application. They are included in and constitute a part of the present application. The accompanying drawings illustrate embodiments of the present application and together with the description serve to explain the principles of the present application.

[0018] In the attached figure:

[0019] Figure 1 It is a schematic diagram of the overall structure of a liquid sampling device according to an embodiment of the present application.

[0020] Figure 2 It is a schematic structural diagram of a sampling connection portion of a liquid sampling device according to an embodiment of the present application.

[0021] Figure 3 It is a structural cross-sectional view of a sampling body of a liquid sampling device according to an embodiment of the present application.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the valve body of the liquid sampling device according to one embodiment of the present application.

[0023] Figure 5 It is a structural side view of a valve body of a liquid sampling device according to an embodiment of the present application.

[0024] Figure 6 Schematic diagram of a piston mechanism of a liquid sampling device according to an embodiment of the present application.

[0025] Figure 7 This is a schematic diagram of a piston mechanism of a liquid sampling device according to an embodiment of the present application being in a first front position.

[0026] Figure 8 This is a schematic diagram of the piston mechanism of the liquid sampling device according to one embodiment of the present application being in the second rear position.

[0027] Fig. 9 It is a schematic diagram of the state when the liquid sampling device of one embodiment of the present application is connected to the ball valve of the liquid flow battery energy storage system. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0029] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0030] Unless otherwise specifically stated, the relative arrangement of the components and steps, the numerical expressions and the numerical values ​​described in these embodiments do not limit the scope of the present application. Meanwhile, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0031] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0032] The embodiments of the present application describe a liquid sampling device and a liquid flow battery energy storage system.

[0033] Figure 1 It is a schematic diagram of the overall structure of a liquid sampling device according to an embodiment of the present application. Figure 2 It is a schematic structural diagram of a sampling connection portion of a liquid sampling device according to an embodiment of the present application. Figure 3 It is a schematic structural diagram of a sampling body of a liquid sampling device according to an embodiment of the present application. Figure 4 It is a schematic diagram of the three-dimensional structure of the valve body of the liquid sampling device according to one embodiment of the present application. Figure 5 It is a structural side view of a valve body of a liquid sampling device according to an embodiment of the present application. Figure 6 Schematic diagram of a piston mechanism of a liquid sampling device according to an embodiment of the present application.

[0034] refer to Figures 1 to 6 The liquid sampling device 100 includes a sampling connection portion 101 , a sampling body 102 , a valve body 103 and a piston mechanism 104 .

[0035] The sampling body 102 is a long cylindrical structure and has a through hollow portion 111. The valve body 103 includes a sealing body 121 and a selection shaft 122. The sealing body 121 is located in the hollow portion 111 of the sampling body 102. The sealing body 121 has a through portion 124. The first end of the selection shaft 122 is fixedly connected to the non-through region of the sealing body 121. The piston mechanism 104 includes a plug 131 and a pull rod 132. The pull rod 132 is fixedly connected to the second end of the plug 131.

[0036] In some embodiments, the plug 131 is installed in the hollow portion 111 of the sampling body 102 and contacts the interior of the hollow portion 111 , and can move in the hollow portion 111 under the push-pull action of the pull rod 132 .

[0037] The second end of the sampling connection part 101 is sleeved on the first end of the sampling body 102. The sampling body 102 also includes a mounting hole 113 passing through the side wall of the long cylindrical structure, and the selection shaft 122 passes through the mounting hole 113 and extends to the outside of the side wall of the long cylindrical structure. The diameter of the through portion 124 of the sealing body 121 is greater than or equal to the diameter of the plug 131.

[0038] In some embodiments, the sampling connection portion 101 further includes a second hollow structure 108 , and the second hollow structure 108 is integrally connected with the hollow portion 111 of the sampling body 102 and has the same inner diameter.

[0039] In some embodiments, the second end of the sampling body 102 is further provided with a bayonet structure 117 to lock the plug 131 so that the plug 131 does not fall out of the hollow portion 111 of the sampling body 102. The bayonet structure 117 is made of, for example, PVC (polyvinyl chloride) or other materials with specific strength and corrosion resistance.

[0040] A sealing plug 133 is also provided at the first end of the plug 131, and the diameter of the sealing plug 133 is larger than the diameter of the plug 131. In some embodiments, a sealing ring 134 is also provided around the outer periphery of the plug 131. The sealing ring 134 and the plug 131 are, for example, an integrated structure. The sealing plug 131 is, for example, made of an elastic material, specifically, for example, rubber or other types of elastic materials. The sealing plug 131 also has, for example, anti-corrosion properties. The plug 131 is, for example, made of plastic material and has corrosion resistance. The material of the sealing ring 134 is, for example, FPM (fluororubber) material, or other elastic and corrosion-resistant materials.

[0041] In some embodiments, the end surface 115 of the first end of the sampling body 102 has a recessed portion 112, and a second sealing ring 116 is disposed in the recessed portion 112. The end surface 110 of the second end of the sampling connection portion 101 contacts the second sealing ring 116. A pull ring structure 135 is disposed at the tail of the pull rod 132, and the diameter of the pull ring structure 135 is greater than the diameter of the pull rod 132.

[0042] In some embodiments, the sampling body 102 further includes an extension hole structure 114 disposed outside the side wall of the long cylindrical structure, and the mounting hole 113 is integrally connected with the extension hole structure 114. The selection shaft 122 passes through the mounting hole 113 and the extension hole structure 114. The extension hole structure 114 has a corresponding extension side wall 119. Figure 3 The figure also shows the rotating space 120 corresponding to the sealing body 121 of the valve body 103. The rotation of the sealing body 121 in the rotating space 120 realizes different structural relationships between the through-portion 124 of the sealing body 121 and the hollow portion 111 of the sampling body 102. When the through-portion 124 of the sealing body 121 and the hollow portion 111 of the sampling body 102 are distributed in the same direction, the plug 131 of the piston mechanism 104 can move freely in the hollow portion 111 of the sampling body 102 through push-pull action, thereby realizing the functions of extracting, storing and exhausting liquid. When the through-portion 124 of the sealing body 121 and the hollow portion 111 of the sampling body 102 are distributed in a vertical direction, the non-through-portion area of ​​the sealing body 121 realizes the truncation of the hollow portion 111 of the sampling body 102, thereby realizing the corresponding sealing effect.

[0043] In some embodiments, the front end of the sampling connection portion 101 further includes an extended contact portion 109 , which is fixedly connected to the first end of the second hollow structure 108 , and the inner diameter of the extended contact portion 109 is greater than the inner diameter of the second hollow structure 108 .

[0044] In some embodiments, the valve body 103 further includes a handle body 123 , and the handle body 123 is fixedly connected to the second end of the selection shaft 122 .

[0045] Figure 7 This is a schematic diagram of a piston mechanism of a liquid sampling device according to an embodiment of the present application being in a first front position. Figure 8 This is a schematic diagram of the piston mechanism of the liquid sampling device according to one embodiment of the present application being in the second rear position. Fig. 9 It is a schematic diagram of the state when the liquid sampling device of one embodiment of the present application is connected to the ball valve of the liquid flow battery energy storage system.

[0046] refer to Fig. 9 The liquid flow battery energy storage system includes the liquid sampling device 100 and the ball valve 801 described above. The ball valve 801 is installed in the operation pipeline of the liquid flow battery energy storage system ( Fig. 9 (not shown).

[0047] The extended contact portion 109 of the sampling connection portion 101 of the liquid sampling device 100 is connected to the output interface 802 of the ball valve 801, specifically, for example, connected via a threaded structure, so as to sample the electrolyte in the operating pipeline of the liquid flow battery energy storage system.

[0048] Before the front end of the sampling connection part 101 of the liquid sampling device is connected to the ball valve 801, for example, the piston mechanism of the liquid sampling device is pushed to the first front position, and the first front position actually protrudes the sampling body and the sampling connection part, thereby minimizing the gap generated when connecting with the ball valve of the liquid flow battery energy storage system, so that the hollow part and the second hollow structure of the liquid sampling device are completely isolated from the air before extracting the electrolyte.

[0049] When the front end of the sampling connection part 101 of the liquid sampling device is connected to the ball valve 801, the output interface 802 of the ball valve 801 on the liquid flow battery system is opened, and the piston mechanism 104 is pulled. After the electrolyte fills the sampling body, the ball valve 801 on the operating pipeline of the liquid flow battery energy storage system is closed, and the valve body of the liquid sampling device is closed (that is, the through part of the sealing body of the valve body is adjusted to a position offset from the hollow part of the sampling body), and the connection is disconnected. At this time, the electrolyte sealed in the sampling body is the obtained vacuum electrolyte sample.

[0050] The liquid sampling device of the present application can achieve real-time and high-quality sampling of the negative electrode electrolyte in the operating pipeline for the liquid flow battery energy storage system, especially the all-vanadium liquid flow battery energy storage system, and titrate the divalent and trivalent vanadium electrolytes to avoid the electrolyte from affecting the subsequent chemical analysis of the electrolyte components due to oxidation reactions in the open space.

[0051] The chemical analysis of the electrolyte can be used to measure the utilization rate of the electrolyte in actual charging and discharging and the composition ratio of the electrolyte under different operating conditions. The data obtained from the actual composition of the electrolyte can be used to provide a basis for further optimization of the formulation of the electrolyte and the development of electrolyte active catalysts. Therefore, the liquid sampling device and liquid flow battery energy storage system of the present application, through real-time and high-quality sampling of the electrolyte, are also conducive to the detection of the operating status of the liquid flow battery energy storage system and the improvement of equipment performance.

[0052] The basic concepts have been described above. Obviously, for those skilled in the art, the above utility model disclosure is only used as an example and does not constitute a limitation of the present application. Although not explicitly stated here, those skilled in the art may make various modifications, improvements and corrections to the present application. Such modifications, improvements and corrections are suggested in the present application, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of the present application.

[0053] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0054] Similarly, it should be noted that in order to simplify the description disclosed in this application and thus help understand one or more utility model embodiments, in the above description of the embodiments of this application, multiple features are sometimes combined into one embodiment, drawing or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0055] Although the present application has been described with reference to the current specific embodiments, ordinary technicians in this technical field should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions may be made without departing from the spirit of the present application. Therefore, as long as the changes and modifications to the above embodiments are within the essential spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. A liquid sampling device, characterized in that: include: Sampling connection; A sampling body, wherein the sampling body is a long cylindrical structure and has a through hollow portion; The valve body comprises a sealing body and a selection shaft, wherein the sealing body is located in the hollow portion of the sampling body, the sealing body has a through portion, and the first end of the selection shaft is fixedly connected to the non-through region of the sealing body; The piston mechanism comprises a plug and a pull rod, wherein the pull rod is fixedly connected to the second end of the plug; Wherein, the plug is installed in the hollow part of the sampling body and contacts the inside of the hollow part, and can move in the hollow part under the push and pull action of the pull rod; The second end of the sampling connection part is sleeved on the first end of the sampling body; the sampling body also includes a mounting hole passing through the side wall of the long cylindrical structure, and the selection axis passes through the mounting hole and extends to the outside of the side wall of the long cylindrical structure; the diameter of the through part of the sealing body is greater than or equal to the diameter of the plug.

2. The liquid sampling device according to claim 1, characterized in that: The sampling connection part further includes a second hollow structure, which is integrally connected with the hollow part of the sampling body and has the same inner diameter as the second hollow structure.

3. The liquid sampling device according to claim 1, characterized in that: The valve body further comprises a handle body, and the handle body is fixedly connected to the second end of the selection shaft.

4. The liquid sampling device according to claim 1, characterized in that: The second end of the sampling body is also provided with a bayonet structure to hold the plug in place so that the plug does not fall out of the hollow portion of the sampling body.

5. The liquid sampling device according to claim 1, characterized in that: A sealing plug is also installed at the first end of the plug, and the diameter of the sealing plug is larger than the diameter of the plug; the sealing plug is made of elastic material.

6. The liquid sampling device according to claim 1, characterized in that: A sealing ring is also arranged around the outer periphery of the plug; the sealing ring and the plug are an integrated structure.

7. The liquid sampling device according to claim 1, characterized in that: The end surface of the first end of the sampling body has a recessed portion, in which a second sealing ring is arranged; the end surface of the second end of the sampling connection portion contacts the second sealing ring.

8. The liquid sampling device according to claim 1, characterized in that: A pull ring structure is provided at the tail of the pull rod, and the diameter of the pull ring structure is greater than the diameter of the pull rod.

9. The liquid sampling device according to claim 1, characterized in that: The sampling body further comprises an extension hole structure arranged outside the side wall of the long cylindrical structure, the mounting hole and the extension hole structure are integrally connected; the selection shaft passes through the mounting hole and the extension hole structure.

10. The liquid sampling device according to claim 2, characterized in that: The front end of the sampling connection portion further includes an extended contact portion, the extended contact portion is fixedly connected to the first end of the second hollow structure, and the inner diameter of the extended contact portion is greater than the inner diameter of the second hollow structure.

11. A liquid flow battery energy storage system, comprising the liquid sampling device according to any one of claims 1 to 10 and a ball valve, wherein the ball valve is installed on an operating pipeline of the liquid flow battery energy storage system; The extended contact portion of the sampling connection portion of the liquid sampling device is connected to the output interface of the ball valve to achieve sampling of the electrolyte in the operating pipeline of the liquid flow battery energy storage system.

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