WO2020259242A1

WO2020259242A1 - Anti-crystallization liquid injection pump

Info

Publication number: WO2020259242A1
Application number: PCT/CN2020/094247
Authority: WO
Inventors: 何司宇; 罗跃荣; 何仁雄; 谌荥荣
Original assignee: 深圳市恒瑞兴自动化设备有限公司
Priority date: 2019-06-28
Filing date: 2020-06-03
Publication date: 2020-12-30
Also published as: CN110159506A

Abstract

An anti-crystallization liquid injection pump comprises a pump head (1), a plunger (2), and a driving assembly (4) for driving the plunger (2) to reciprocate relative to the pump head (1). The driving assembly (4) is connected to the plunger (2) by means of a connecting member (5). A liquid storage hole (11) is provided on the pump head (1). A seal assembly (3) is provided in the liquid storage hole (11). One end of the plunger (2) passes through the seal assembly (3), and a first cavity (30) is formed therebetween. A through-hole (31) for communicating the first cavity (30) with the liquid storage hole (11) is provided on the seal assembly (3). A liquid injection hole (131) for injecting an anti-crystallization medium into the liquid storage hole (11) so as to prevent crystallization of an electrolyte is further provided on the pump head (1), thereby preventing crystallization of an electrolyte, preventing a seal ring from being damaged, and improving the reliability and the service life of the liquid injection pump.

Description

Anti-crystallization injection pump

Technical field

The invention belongs to the technical field of fluid transportation, and particularly relates to an anti-crystallization liquid injection pump.

Background technique

In the battery electrolyte filling industry, a liquid injection pump is usually used to fill the battery electrolyte.

technical problem

In the actual injection process, since the electrolyte is easy to crystallize, electrolyte crystallization will appear in the plunger of the injection pump, and the crystallized electrolyte will damage the seal ring of the plunger and affect the injection pump. The reliability and longevity of the use.

Technical solutions

The purpose of the present invention is to overcome one of the above technical problems and provide an anti-crystallization liquid injection pump, which can prevent electrolyte crystallization, avoid damage to the sealing ring, and improve the reliability and life of the liquid injection pump.

The technical solution of the present invention is: an anti-crystallization liquid injection pump, comprising a pump head, a plunger, and a drive assembly for driving the plunger to move back and forth relative to the pump head. The drive assembly is connected to the pump head through a connecting piece. The plunger is connected, the pump head is provided with a liquid storage hole, the liquid storage hole is provided with a sealing component, one end of the plunger penetrates the sealing component, and a first cavity is formed between the two The sealing assembly is provided with a through hole connecting the first cavity and the liquid storage hole, and the pump head is also provided with an anti-crystallization medium for inputting the liquid storage hole to prevent The injection hole for electrolyte crystallization.

Specifically, the sealing assembly includes a body, a plunger hole is opened in the body, one end of the plunger is penetrated in the plunger hole, and the through hole is opened on the body and is connected to the plunger hole. The first cavity communicates.

Further, the sealing assembly further includes a first sealing ring, two ends of the body and a side close to the plunger are respectively provided with sealing steps, and the first sealing steps are respectively provided in the two sealing steps. A sealing ring.

Further, the sealing assembly further includes a second sealing ring, two sealing grooves are respectively provided on both ends of the body and on the side opposite to the inner wall of the liquid storage hole, and the two sealing grooves are respectively provided with The second sealing ring.

Specifically, the pump head is provided with a plurality of the liquid storage holes, and each of the liquid storage holes is provided with the sealing component.

Specifically, the inner wall of each liquid storage hole is provided with a communication hole for communicating with the liquid injection hole.

Specifically, a plurality of the plungers are provided, and each plunger is evenly distributed on the connecting member on a circumference, and is fixedly connected to the connecting member through a clamping assembly.

Specifically, a plurality of fixing holes for accommodating and installing the plunger are provided on the connecting piece, and the clamping assembly includes a shrinking nozzle for clamping the plunger and a clamp for driving the shrinking nozzle To tighten the locking member of the plunger, the shrinking nozzle is arranged in the fixing hole.

Specifically, the constriction nozzle includes a body and a plurality of clamping pieces arranged at intervals, one end of each clamping piece is fixedly connected to the body, and the other end is extended; one end of the plunger is arranged on each of the Between clamping pieces.

Specifically, the driving assembly includes a driving member and a ball screw, the driving member is connected with the ball screw, and the ball screw penetrates the connecting member.

Beneficial effect

The invention provides an anti-crystallization plunger pump. The pump head is provided with a liquid storage hole, a sealing component is arranged in the liquid storage hole, and one end of the plunger penetrates the sealing component, and a first Cavity. By using a through hole connecting the first cavity and the liquid storage hole on the sealing assembly, and at the same time, the pump head is also provided with an anti-crystallization medium for inputting the anti-crystallization medium into the liquid storage hole to at least prevent electrolysis in the liquid storage hole. Liquid injection hole for liquid crystals. In this way, by injecting the anti-crystallization medium into the liquid injection hole, the anti-crystallization medium can enter the liquid storage hole and enter the first cavity through the through hole. Therefore, under the action of the anti-crystallization medium, the electrolyte crystallization can be avoided in the liquid storage hole and on the plunger, and the sealing ring can be prevented from being worn by the crystallized electrolyte, which improves the use of the liquid injection pump. Reliability and longevity.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings.

Figure 1 is an exploded schematic diagram of an anti-crystallization liquid injection pump provided by an embodiment of the present invention;

2 is a cross-sectional view in a first direction of the anti-crystallization liquid injection pump provided by an embodiment of the present invention;

Figure 3 is a cross-sectional view in a second direction of the anti-crystallization liquid injection pump provided by an embodiment of the present invention;

4 is a schematic diagram of the three-dimensional structure of the body in the sealing assembly provided by the embodiment of the present invention;

Figure 5 is a cross-sectional view of the body in the sealing assembly provided by an embodiment of the present invention;

6 is a schematic diagram of the three-dimensional structure of the mounting block provided by the embodiment of the present invention;

Fig. 7 is a partial enlarged schematic diagram of A in Fig. 2;

8 is a cross-sectional view of the anti-crystallization liquid injection pump provided by an embodiment of the present invention in the third direction;

Figure 9 is a schematic structural diagram of a connector provided by an embodiment of the present invention;

Fig. 10 is a schematic structural diagram of a constriction nozzle provided by an embodiment of the present invention.

The best mode of the invention

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

It should be noted that the terms "setting" and "connection" should be understood in a broad sense. For example, they can be directly arranged and connected, or indirectly arranged and connected through a centered component or a centered structure.

In addition, if there are "longitudinal", "horizontal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "left" in the embodiment of the present invention The terms “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner” and “outer” indicate the orientation or positional relationship, which are based on the orientation or positional relationship or convention shown in the drawings The placement state or use state is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the structure, feature, device or element referred to must have a specific orientation or positional relationship, nor must it be constructed in a specific orientation And operation, therefore cannot be understood as a limitation of the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

The specific technical features and embodiments described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different specific technical features/embodiments can be combined to form different implementations. In order to avoid unnecessary repetition, various possible combinations of specific technical features/embodiments in the present invention will not be described separately.

As shown in Figures 1 and 2, an anti-crystallization liquid injection pump provided by an embodiment of the present invention is mainly used for quantitative injection of electrolyte in a battery. The anti-crystallization liquid injection pump includes a pump head 1, a plunger 2, and a drive assembly 4 for driving the plunger 2 to reciprocate relative to the pump head 1. The drive assembly 4 is connected to the plunger 2 through a connecting piece 5, and the connecting piece 5 It is used to transmit the driving force generated by the driving assembly 4 to the plunger 2 so that the plunger 2 can reciprocate. Specifically, the pump head 1 is provided with a liquid storage hole 11, the liquid storage hole 11 is provided with a sealing assembly 3, and one end of the plunger 2 penetrates the sealing assembly 3, and a first cavity 30 is formed between the two. (Refer to Figure 7). In this way, the driving assembly 4 drives the plunger 2 to move in the liquid storage hole 11, and the plunger 2 is sealed by the sealing assembly 3 to ensure that the electrolyte will not leak during the working process and can be sucked first. The liquid storage hole 11 is then squeezed out from the liquid storage hole 11. The plunger 2 can reciprocate relative to the sealing assembly 3 during the process of sucking and outputting the electrolyte, and the sealing assembly 3 provides a reliable sliding seal to the plunger 2.

As shown in Figure 1 and Figure 2, in the actual suction and injection process, the electrolyte is prone to crystallize, and the material produced by the crystallization is harder. During the reciprocating movement of the plunger 2, it will continue to interact with the sealing assembly 3. There is a problem of damaging the sealing assembly 3 due to friction. Therefore, in order to prevent the electrolyte from crystallizing, referring to Figures 4 and 7, in the embodiment of the present invention, the sealing assembly 3 is provided with a through hole 31 connecting the first cavity 30 and the liquid storage hole 11. At the same time, the pump The head 1 is also provided with a liquid injection hole 131 (refer to FIG. 6) for inputting an anti-crystallization medium into the liquid storage hole 11 to prevent crystallization of the electrolyte. With this arrangement, the anti-crystallization medium enters the liquid storage hole 11 through the liquid injection hole 131, and can enter the first cavity 30 through the through hole 31 on the sealing assembly 3, and a part of the column located in the pump head 1 The plug 2 is directly in the first cavity 30. Therefore, the anti-crystallization medium can coat the part of the plunger 2 located in the first cavity 30 and other parts located in the liquid storage hole 11, that is, adhere to the outer peripheral wall of the part of the plunger 2 that extends into the pump head 1. With anti-crystallization medium. In this way, under the action of the anti-crystallization medium, it is possible to prevent the generation of electrolyte crystalline material on the plunger 2 and the inner wall of the liquid reservoir 11, thereby avoiding the occurrence of damage to the sealing assembly 3 by the crystalline material, and improving the actual Reliability of use. In the embodiment of the present invention, the anti-crystallization medium is dimethyl carbonate, which has excellent solubility and can effectively prevent the crystallization of the electrolyte and reduce the problem of pump jams. At the same time, the anti-crystallization medium also has a lubricating effect, which can reduce the wear of the sealing assembly 3 and improve the smoothness of the reciprocating movement of the plunger 2.

As shown in Figures 2 to 5, the sealing assembly 3 includes a body 32. The body 32 is provided with a plunger hole 321. One end of the plunger 2 is inserted into the plunger hole 321, and the through hole 31 is opened on the body 32 and connected with The first cavity 30 (refer to FIG. 7) communicates. In the specific arrangement, facing the direction after the plunger 2 is installed, a first sinking groove 324 lower than both ends is provided at the middle position of the inner wall of the body 32 (the middle position refers to the length direction along the body 32 , In the area where the two ends are not connected, and the ends refer to the two end points of the body 32) so as to be combined with the plunger 2 to form the first cavity 30 described above, and the first cavity 30 formed by the combination is closed Structure; and the through hole 31 is opened on the body 32 at a position that can communicate with the first cavity 30 to ensure that the anti-crystallization medium can enter the first cavity 30 to perform the plunger 2 located in the first cavity 30 Anti-crystallization protection.

Furthermore, as shown in FIGS. 2 to 5, a second sinking groove 325 is also provided on the other side of the body 32 where the first sinking groove 324 is formed, that is, in the direction toward the inner wall of the liquid storage hole 11, The middle position of the outer wall of the main body 32 is provided with a second sinking groove 325 lower than the two ends, (the middle position refers to the area along the length of the main body 32 that is not connected to the two ends, and the end refers to the main body 32 Two endpoints). In this way, the first sinking groove 324 and the second sinking groove 325 communicate with each other under the connection of the through hole 31. Therefore, the anti-crystallization medium can first enter the second sinking groove 325 and then flow into the first air through the through hole 31. With this arrangement, the second sinking groove 325 serves the purpose of storing the anti-crystallization medium, ensuring that there is always enough anti-crystallization medium on the plunger 2 to effectively prevent crystalline substances from appearing at the corresponding position of the plunger 2.

Further, as shown in Figures 2 to 7, in order to achieve reliable sealing of the moving plunger 2, the sealing assembly 3 further includes a first sealing ring 33, which is located near the plunger at both ends of the body 32 A sealing step 322 is respectively provided on one side of 2 and a first sealing ring 33 is respectively provided in the two sealing steps 322. In this way, the two first sealing rings 33 are directly sleeved on the plunger 2 and are located at both ends of the body 32 in the longitudinal direction. The gap between the plunger 2 and the body 32 is sealed at both ends to ensure the reliability of the sealing effect.

Further, as shown in FIGS. 2 to 7, the sealing assembly 3 further includes a second sealing ring 34, and correspondingly, sealing grooves 323 are respectively provided at both ends of the body 32 and on the side opposite to the inner wall of the liquid storage hole 11. , The two sealing grooves 323 are respectively provided with a second sealing ring 34. In this way, the second sealing ring 34 is used to seal the gap between the main body 32 and the wall of the liquid storage hole 11 at the corresponding position to avoid leakage of electrolyte and ensure the reliability of liquid injection.

In order to improve the efficiency of liquid injection, a plurality of liquid storage holes 11 are provided in the pump head 1, and each liquid storage hole 11 is provided with a sealing assembly 3 respectively. At the same time, as shown in FIG. 8, a plurality of plungers 2 are correspondingly provided, and each plunger 2 is evenly distributed on the connecting member 5 on the circumference, and is fixedly connected to the connecting member 5 (refer to FIG. 3) through a clamping assembly. In the specific setting, the number of plungers 2 and the number of liquid storage holes 11 are kept matching. In this way, each plunger 2 is uniformly driven by the connecting member 5, which can realize the suction and output of the electrolyte by a plurality of plungers 2, so that the efficiency of injecting the battery electrolyte can be improved. The pump head 1 is also provided with a liquid inlet pipe and a liquid outlet pipe for communicating with the corresponding liquid storage hole 11, the suction of the electrolyte is realized through the liquid inlet pipe, and the pumped electrolyte is output through the liquid outlet pipe fittings, and the amount Inject into the battery.

Specifically, as shown in FIGS. 2 to 6, the pump head 1 includes a pump body 12 and a mounting block 13, and the pump body 12 and the mounting block 13 are fixedly connected by bolts. The pump body 12 and the mounting block 13 are respectively provided with a first hole 121 and a second hole 132 at the same position. The first hole 121 and the second hole 132 are combined to form the aforementioned liquid storage hole 11, and the sealing component 3 is installed in the second hole 132 Inside. According to the arrangement, there are a plurality of first holes 121 and second holes 132, and the liquid injection holes 131 are arranged on the mounting block 13, and both are communicated with each second hole 132.

Specifically, in order to realize the delivery of the anti-crystallization medium into each liquid storage hole 11, in the embodiment of the present invention, the inner wall of each liquid storage hole 11 is provided with a communication hole 133 for communicating with the liquid injection hole 131 (refer to FIG. 6). In this way, the anti-crystallization medium entered through the liquid injection hole 131 can enter the corresponding liquid storage hole 11 through the communication of each communication hole 133, so as to realize the anti-crystallization protection in each liquid storage hole 11. It is understandable that a structure interconnected between the liquid storage holes 11 can also be used to realize the flow of the anti-crystallization medium in the liquid storage holes 11, which can also meet the requirements of use.

As shown in FIGS. 3 and 8, the plungers 2 are evenly distributed on the connecting member 5 on the circumference, and the plungers 2 are fixedly connected to the connecting member 5 through the clamping assembly 6. In this way, the plungers 2 are arranged in a circumferentially uniform manner, thereby saving the space occupied by the plungers 2 and improving the compactness of the overall structure, thereby reducing the volume of the entire anti-crystallization liquid injection pump , Easy to install and use. If the plungers 2 are fixedly connected to the connecting piece 5, the connecting piece 5 can drive the plungers 2 to move uniformly. At the same time, by fixing each plunger 2 with the connecting piece 5 through the clamping assembly 6, the clamping assembly 6 can always clamp and fix the plunger 2. In this way, under the clamping and fixing of the clamping assembly 6, the stability of the connection of the plungers 2 is ensured, and there will be no deviation or looseness during the working process, which improves the reliability of use.

Preferably, as shown in FIG. 8, in the embodiment of the present invention, four plungers 2 are provided, and the four plungers 2 are distributed circumferentially. Of course, in other embodiments, according to actual design needs, the plungers 2 can also be set to other numbers, and the plungers 2 are arranged in a circumferentially uniform manner. The plunger 2 is not set here. The number is limited.

As shown in Figures 8 to 10, the connecting member 5 is provided with a plurality of fixing holes 51 for receiving and installing the plunger 2, and the clamping assembly 6 (refer to Figure 3) includes a shrinking nozzle 61 for holding the plunger 2 And a locking member 62 for driving the shrinking nozzle 61 to clamp the plunger 2, and the shrinking nozzle 61 is arranged in the fixing hole 51. The shrinking nozzle 61 clamps one end of the plunger 2; and the locking member 62 can be connected to the plunger 2 or connected to the shrinking nozzle 61. In this way, during the fixed connection, through the pulling of the locking member 62, the clamping part of the shrinking nozzle 61 can be finally reduced, and the plunger 2 can be clamped and fixed. Preferably, the locking member 62 is connected with the shrinking nozzle 61, and the shrinking nozzle 61 is pulled by the locking member 62 to move in the fixed hole 51. During the movement, the shrinking nozzle 61 can be squeezed and contracted by the restriction of the fixed hole 51. The plunger 2 can be clamped and fixed. The locking member 62 can be a bolt.

Specifically, in the actual installation, in order to achieve reliable clamping and fixing, the fixing hole 51 is set perpendicular to the axis of the fixing hole 51 so that its cross-sectional area gradually decreases from the end close to the pump head 1 to the end far away from the pump head 1. In this way, the shrinking nozzle 61 has an open structure, one end of the plunger 2 is inserted into the shrinking nozzle 61 from the open, and under the pulling of the locking member 62, the open structure of the shrinking nozzle 61 is gradually contracted to realize the clamping column Plug 2.

In order to improve the stability of the clamping plunger 2, the outer side wall of the shrinking nozzle 61 is set as an inclined surface, and the inclined direction is set to be the same as the inclined direction of the inner side wall of the fixing hole 51. In this way, after the shrinking nozzle 61 is arranged in the fixing hole 51, the outer side wall of the shrinking nozzle 61 is matched with the inner side wall of the fixing hole 51, and during the locking and clamping process, it can slide relatively smoothly to realize shrinking and clamping.

As shown in FIG. 10, the shrinking nozzle 61 includes a shrinking body 611 and a plurality of clamping pieces 612 arranged at intervals. One end of each clamping piece 612 is fixedly connected to the shrinking body 611, and the other end is extended. Specifically, each clamping piece The extended ends of the 612 are combined to form the above-mentioned open structure. One end of the plunger 2 (refer to FIG. 3) is arranged between the clamping pieces 612, that is, one end of the plunger 2 is arranged in the open structure. In addition, each clamping piece 612 can be elastically deformed, so that it can be squeezed and deformed elastically in the fixing hole 51 to realize that each clamping piece 612 clamps and fixes the plunger 2 together.

As shown in FIGS. 1 and 3, the driving assembly 4 includes a driving member 41 and a ball screw 42. The driving member 41 is connected to the ball screw 42, and the ball screw 42 penetrates the connecting member 5. In the specific arrangement, the connecting member 5 is provided with a connecting hole 52 (refer to FIG. 4). The connecting hole 52 is provided with a driving block 10 threadedly connected with the ball screw 42. The ball screw 42 is threaded with the driving block 10 to realize Drive the connecting piece 5 to move. The driving member 41 is a servo motor, and the rotation of the servo motor drives the rotation of the ball screw 42, and the ball screw 42 and the driving block 10 are screwed together. Therefore, the rotating ball screw 42 will drive the drive block 10 to move, and the drive block 10 will drive the connecting member 5 to move, thereby driving the plungers 2 to move back and forth to achieve the suction or output of the electrolyte. In this manner, the mutual cooperation of the servo motor and the ball screw 42 realizes the precise driving of each plunger 2 to move, thereby achieving the purpose of accurately controlling the liquid injection amount. The connecting holes are arranged at the center positions of the plungers 2 distributed on each circumference, so that the plungers 2 can be provided with a balanced driving force, so that the plungers 2 can move synchronously and smoothly.

As shown in Figures 1 and 3, the liquid injection pump also includes a mounting frame 7. The mounting frame 7 is provided with a first support plate 71, a second support plate 72 and a third support plate 73, and the pump head 1 is fixed to the first On the support plate 71, specifically the mounting block 13 is fixed on the first support plate 71, the pump head 1 is fixedly connected to the mounting block 13; the ball screw 42 is inserted between the first support plate 71 and the second support plate 72 , The driving member 41 is fixedly installed on the third supporting plate 73. Through this arrangement, each component is fixed and supported by the mounting frame 7 to ensure the stability of the overall structure.

Further, as shown in FIGS. 1 and 3, a guide rod 8 for guiding the movement of the connecting member 5 is also provided between the first supporting plate 71 and the second supporting plate 72, and the connecting member 5 is movably sleeved on the guide rod 8. In this way, the connecting member 5 is correspondingly provided with a guide hole 53 for the guide rod 8 to pass through (refer to FIG. 9 ), and the guide rod 8 is movable through the guide hole 53. In this way, the guide rod 8 provides a guiding function for the movement of the connecting member 5, which ensures that when the connecting member 5 drives the plungers 2 to move, the movement positions of the plungers 2 will not be offset, and the accurate moving positions are maintained. Preferably, two guide rods 8 are provided and arranged oppositely, and each plunger 2 and/or ball screw 42 is located between the two guide rods 8.

Further, as shown in FIG. 1, the liquid injection pump further includes a casing 9, and the casing is arranged above the mounting frame 7. In this way, the cover of the housing 9 can protect the internal parts, and at the same time improve the overall aesthetics of the liquid injection pump.

In the anti-crystallization plunger pump provided in the embodiment of the present invention, a liquid storage hole is opened on the pump head, a sealing component is arranged in the liquid storage hole, and one end of the plunger penetrates the sealing component, and a second A cavity. By using a through hole connecting the first cavity and the liquid storage hole on the sealing assembly, and at the same time, the pump head is also provided with an anti-crystallization medium for inputting the anti-crystallization medium into the liquid storage hole to at least prevent electrolysis in the liquid storage hole. Liquid injection hole for liquid crystals. In this way, by injecting the anti-crystallization medium into the liquid injection hole, the anti-crystallization medium can enter the liquid storage hole and enter the first cavity through the through hole. Therefore, under the action of the anti-crystallization medium, the electrolyte crystallization can be avoided in the liquid storage hole and on the plunger, and the sealing ring can be prevented from being worn by the crystallized electrolyte, which improves the use of the liquid injection pump. Reliability and longevity.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included in the protection of the present invention. Within range.

Claims

An anti-crystallization liquid injection pump, comprising a pump head, a plunger, and a drive assembly for driving the plunger to reciprocate relative to the pump head. The drive assembly is connected to the plunger through a connector, and is characterized in A liquid storage hole is opened on the pump head, a sealing component is arranged in the liquid storage hole, one end of the plunger penetrates the sealing component, and a first cavity is formed between the two; The sealing assembly is provided with a through hole connecting the first cavity and the liquid storage hole, and the pump head is also provided with an anti-crystallization medium for inputting the liquid storage hole to prevent the electrolyte from crystallization Of the injection hole.
The anti-crystallization liquid injection pump according to claim 1, wherein the sealing assembly comprises a body, a plunger hole is opened in the body, and one end of the plunger is penetrated in the plunger hole, The through hole is opened on the body and communicates with the first cavity.
The anti-crystallization liquid injection pump according to claim 2, wherein the sealing assembly further comprises a first sealing ring, and both ends of the body and the side close to the plunger are respectively provided with sealing steps , The first sealing ring is respectively arranged in the two sealing steps.
The anti-crystallization liquid injection pump according to claim 2, wherein the sealing assembly further comprises a second sealing ring, and both ends of the body and located on the side opposite to the inner wall of the liquid storage hole are respectively provided There is a sealing groove, and the second sealing ring is respectively arranged in the two sealing grooves.
The anti-crystallization liquid injection pump according to claim 1, wherein a plurality of the liquid storage holes are provided in the pump head, and the sealing components are respectively provided in each of the liquid storage holes.
The anti-crystallization liquid injection pump according to claim 5, wherein the inner wall of each liquid storage hole is provided with a communication hole for communicating with the liquid injection hole.
The anti-crystallization liquid injection pump according to claim 5, wherein the plunger is provided with a plurality of plungers, each of the plungers is evenly distributed on the connecting member on a circumference, and is connected to the connecting member through a clamping assembly Pieces are fixedly connected.
The anti-crystallization liquid injection pump of claim 7, wherein the connecting member is provided with a plurality of fixing holes for receiving and installing the plunger, and the clamping assembly includes A shrinking nozzle of the plunger and a locking member for driving the shrinking nozzle to clamp the plunger, and the shrinking nozzle is arranged in the fixing hole.
The anti-crystallization liquid injection pump according to claim 8, wherein the shrinking nozzle comprises a body and a plurality of clamping pieces arranged at intervals, one end of each clamping piece is fixedly connected to the body, and the other end Extending; one end of the plunger is arranged between the clamping pieces.
The anti-crystallization liquid injection pump according to any one of claims 1 to 9, wherein the driving assembly includes a driving member and a ball screw, the driving member is connected with the ball screw, and the ball The screw rod penetrates the connecting piece.