Liquid injection valve

Abstract

The utility model discloses a liquid injection valve which comprises a valve body, a valve rod and a valve rod, the valve body comprises a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are communicated through a liquid inlet channel, a moving channel and a liquid outlet channel; the valve rod is movably connected to the interior of the moving channel, a communicating channel is formed in the valve rod, and the communicating channel can communicate with the liquid inlet channel and the liquid outlet channel; the two valve body sealing rings are arranged on the two opposite sides of the liquid inlet channel respectively and arranged on the valve rod in a sleeving mode, and the valve rod can move in a reciprocating mode relative to the valve body sealing rings; the driving mechanism is connected with the valve rod and can drive the valve rod to move in the moving channel in a reciprocating mode. The utility model discloses a liquid injection valve to solve the problem that the using effect of an existing liquid injection valve is not ideal.

Description

Technical Field

[0001] The present application relates to the technical field of flow control, and more specifically, to a liquid injection valve. Background Art

[0002] In the secondary battery industry, an injection valve is required during the process of filling the battery with electrolyte, and the flow of the injected electrolyte is controlled by opening and closing the injection valve.

[0003] The injection valve currently used is mainly a membrane plug structure, which blocks the electrolyte from entering the cylinder through the membrane to increase the life of the cylinder. The valve port is opened and closed through the cone structure in the center of the membrane and the valve port is sealed. Since the seal between the cone structure and the valve port is usually surface contact or line contact, the crystals in the electrolyte will adhere to the sealing surface or line after precipitation, resulting in the valve body not closing tightly and the service life cannot meet the customer's use requirements.

[0004] Therefore, a liquid injection valve is needed to solve the above problems. Utility Model Content

[0005] In view of this, the purpose of the present application is to propose a liquid injection valve to solve the problem that the existing liquid injection valves provide unsatisfactory use effects.

[0006] Based on the above purpose, the present application provides a liquid injection valve, including:

[0007] A valve body, the valve body comprising a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet being connected via a liquid inlet channel, a moving channel and a liquid outlet channel;

[0008] a valve stem, the valve stem being movably connected in the movable channel, the valve stem being provided with a communication channel, the communication channel being able to connect the liquid inlet channel and the liquid outlet channel;

[0009] Two valve body sealing rings, which are respectively arranged on opposite sides of the liquid inlet channel and are both sleeved on the valve stem, and the valve stem can reciprocate relative to the valve body sealing rings;

[0010] A driving mechanism is connected to the valve stem and can drive the valve stem to move back and forth in the moving channel.

[0011] Optionally, two first installation grooves are arranged in the valve body, and the two first installation grooves are respectively arranged on opposite sides of the liquid inlet channel and are both arranged around the movable channel; the valve body sealing ring is arranged in the first installation groove.

[0012] Optionally, the communication channel includes an axial channel and at least one radial channel communicating with the axial channel, the axial channel is communicating with the liquid outlet channel, and the radial channel can be communicating with the liquid inlet channel.

[0013] Optionally, the valve stem is provided with flow guide grooves distributed along the circumferential direction, and the inlet end of the radial channel is arranged in the flow guide grooves.

[0014] Optionally, the driving mechanism includes a cylinder assembly and a piston movably connected in the cylinder assembly, the cylinder assembly is connected to the valve body, and the piston is connected to the valve stem.

[0015] Optionally, the cylinder assembly includes a cylinder, an end cover and a stopper, the end cover is connected to the cylinder via the stopper to form an active chamber for the reciprocating movement of the piston; the active chamber is connected to the moving channel; the cylinder is connected to the valve body, and the valve stem is passed through the end cover and connected to the piston.

[0016] Optionally, the outer surface of the end cover is provided with at least one second installation groove distributed along the circumferential direction, and an end cover sealing ring is provided in the second installation groove.

[0017] Optionally, the inner surface of the end cover is provided with at least one third installation groove distributed along the circumferential direction, a valve stem sealing ring is provided in the third installation groove, and the valve stem sealing ring is sleeved on the valve stem.

[0018] Optionally, the stopper is a stop ring, the stop ring is sleeved and fixed on the end cover, a stop groove is provided in the cylinder barrel, and the stop ring is disposed in the stop groove.

[0019] In addition, optionally, at least one fourth installation groove distributed along the circumferential direction is provided on the piston, and a piston sealing ring is provided in the fourth installation groove.

[0020] From the above, it can be seen that the injection valve provided by the present application has the following advantages compared with the prior art: when the valve stem reciprocates in the valve body, the position of the connecting channel is controlled to connect or disconnect the liquid inlet channel and the liquid outlet channel. The valve body sealing ring can not only isolate the liquid from overflowing and control the crystallization range on the valve stem, but also apply force to the valve stem to remove the existing crystals, thereby ensuring the sealing effect of the injection valve and extending the service life of the injection valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above-mentioned features and technical advantages of the present application will become clearer and easier to understand through the following description of its embodiments in conjunction with the accompanying drawings.

[0022] Figure 1This is a schematic diagram of the liquid injection valve used in the specific embodiment of the present application.

[0023] Figure 2 for Figure 1 Schematic diagram of the valve stem of the filling valve shown.

[0024] The reference numerals are:

[0025] 1. Valve body; 2. Stop ring; 3. End cover seal; 4. Cylinder assembly; 5. Valve stem; 6. Piston seal; 7. Valve stem seal; 8. Valve body seal. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. The same parts are represented by the same figure numerals. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the accompanying drawings. The words "inside" and "outside" used refer to the direction toward or away from the geometric center of a specific component, respectively.

[0027] Figure 1 This is a schematic diagram of the liquid injection valve used in the specific embodiment of the present application. Figure 2 for Figure 1 Schematic diagram of the valve stem of the injection valve shown in FIG. Figure 1 to Figure 2 As shown, the liquid injection valve comprises a valve body 1, a valve stem 5, two valve body sealing rings 8 and a driving mechanism.

[0028] The valve body 1 comprises a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are connected through a liquid inlet channel, a moving channel and a liquid outlet channel; the liquid inlet channel and the liquid outlet channel are both connected with the moving channel.

[0029] Generally, the valve body 1 is in the shape of a cube or a cuboid, and the liquid inlet and the liquid outlet are respectively arranged on the adjacent two side surfaces of the valve body 1. In one embodiment of the present application, the top of the valve body 1 is provided with a liquid inlet, which is connected to the moving channel through a liquid inlet channel extending in the vertical direction, and the right end of the valve body 1 is provided with a liquid outlet, which is connected to the moving channel through a liquid outlet channel extending in the horizontal direction, and the moving channel runs through the left end of the valve body 1, and the liquid inlet channel and the liquid outlet channel are substantially the same in shape, and their diameters are both smaller than the diameter of the moving channel.

[0030] The valve stem 5 is movably connected in the moving channel. A communication channel is provided on the valve stem 5. The communication channel can connect the liquid inlet channel and the liquid outlet channel. The valve stem 5 moves back and forth along the moving channel to adjust the position of the communication channel. The communication channel of the valve stem 5 is kept in communication with the liquid outlet channel. When the valve stem 5 moves to the point where the communication channel is connected to the liquid inlet channel, the liquid in the liquid inlet channel enters the liquid outlet channel through the communication channel. When the valve stem 5 moves to the point where the communication channel is offset from the liquid inlet channel, that is, when the valve stem 5 contacts the liquid inlet channel, the valve stem 5 blocks the liquid in the liquid inlet channel from flowing out.

[0031] The two valve body sealing rings 8 are respectively arranged on the opposite sides of the liquid inlet channel and are both sleeved on the valve stem 5. The valve stem 5 can move back and forth relative to the valve body sealing ring 8; the two valve body sealing rings 8 can isolate the liquid flowing out of the liquid inlet channel from overflowing; when there are crystals on the valve body 1, when the valve stem 5 moves relative to the valve body sealing ring 8, the valve body sealing ring 8 has a clearing effect on the crystals on the valve stem 5.

[0032] The driving mechanism is connected to the valve stem 5 and can drive the valve stem 5 to move back and forth in the moving channel. The driving mechanism drives the valve stem 5 to move back and forth to adjust whether the moving channel is connected to the liquid inlet channel.

[0033] The driving mechanism drives the valve stem 5 to move back and forth along the moving channel to adjust the position of the connecting channel. The connecting channel of the valve stem 5 remains connected with the liquid outlet channel. When the valve stem 5 moves to the point where the connecting channel is connected with the liquid inlet channel, the liquid in the liquid inlet channel enters the liquid outlet channel through the connecting channel. The two valve body sealing rings 8 isolate the liquid flowing out of the liquid inlet channel from overflowing. When the valve stem 5 moves to the point where the connecting channel is staggered with the liquid inlet channel, that is, when the valve stem 5 contacts the liquid inlet channel, the valve stem 5 blocks the liquid in the liquid inlet channel from flowing out. During the movement of the valve stem 5, since the valve stem 5 and the valve body sealing ring 8 always have relative movement, when the crystals precipitated in the electrolyte are attached to the valve stem 5, they can be removed by the friction of the valve body sealing ring 8, ensuring that there is no foreign matter attached between the valve body sealing ring 8 and the valve stem 5, maintaining the sealing performance, and extending the life of the liquid injection valve. That is, when there are crystals on the valve stem 5, when the valve stem 5 moves relative to the valve body sealing ring 8, the valve body sealing ring 8 can remove the crystals on the valve stem 5.

[0034] With the above-mentioned injection valve, the valve stem 5 can connect or cut off the liquid inlet channel and the liquid outlet channel by controlling the position of the communication channel during the reciprocating movement of the valve stem 5 in the valve body 1. The valve body sealing ring 8 can not only isolate the liquid from overflowing and control the crystallization range on the valve stem 5, but also apply force to the valve stem 5 to remove the existing crystals, thereby ensuring the sealing effect of the injection valve and extending the service life of the injection valve.

[0035] Optionally, two first mounting grooves are provided in the valve body 1, and the two first mounting grooves are respectively provided on opposite sides of the liquid inlet channel, and are both provided around the movable channel; the valve body sealing ring 8 is provided in the first mounting groove. The two first mounting grooves can be relatively distributed along the liquid inlet channel, or can be provided according to the moving range of the valve stem 5 in the movable channel. When the valve body sealing ring 8 is installed in the first mounting groove, the valve body sealing ring 8 is deformed to improve the connection stability. At the same time, the valve body sealing ring 8 protrudes from the first mounting groove and is squeezed against the valve stem 5 to ensure the isolation of the liquid. During the movement of the valve stem 5, the valve body sealing ring 8 rubs against the valve stem 5 to remove the crystals on the valve stem 5. The above structure can reduce the difficulty of installing the valve body sealing ring 8, while improving the installation stability of the valve body sealing ring 8, which helps to improve the sealing performance and facilitate the elimination of crystals.

[0036] Optionally, the connecting channel includes an axial channel and at least one radial channel connected to the axial channel, the axial channel is connected to the liquid outlet channel, and the radial channel can be connected to the liquid inlet channel. The left end of the valve stem 5 is the driving end, the right end is the connecting end, the axial channel runs through the right end face, the radial channel is connected to the axial channel, and when the radial channel is connected to the liquid inlet channel, the liquid in the liquid inlet channel enters the radial channel through the axial channel and enters the liquid outlet channel. When the radial channel is staggered with the liquid inlet channel, that is, when the valve stem 5 contacts the liquid inlet channel, the valve stem 5 blocks the liquid in the liquid inlet channel from flowing out. With the above connecting channel, the structure is relatively simple and easy to manufacture.

[0037] Optionally, the valve stem 5 is provided with flow guide grooves distributed along the circumferential direction, and the inlet end of the radial channel is arranged in the flow guide groove. The flow guide groove provides a buffer space for the liquid, and the liquid flowing out of the liquid inlet channel flows into the radial channel through the flow guide groove. Moreover, the flow guide groove provides an escape space for the valve body sealing ring 8 to avoid damage to the valve body sealing ring 8. With the above-mentioned valve stem 5, when the liquid inlet channel is connected with the radial channel, the liquid flows smoothly, and the service life of the valve body sealing ring 8 is extended.

[0038] In one embodiment of the present application, the radial channel can be set to one or more. When the number is multiple, the multiple radial channels are evenly distributed along the axial channel. When the liquid moves along the guide groove, it can enter the axial channel from radial channels in different directions at the same time.

[0039] Optionally, the driving mechanism includes a cylinder assembly 4 and a piston movably connected in the cylinder assembly 4, the cylinder assembly 4 is connected to the valve body 1, and the piston is connected to the valve stem 5. Gas or liquid drives the piston to reciprocate in the cylinder assembly 4, and the piston drives the valve stem 5 to reciprocate in the valve body 1 to adjust the position of the connecting channel. With the above-mentioned driving mechanism, the structure is relatively simple and easy to operate.

[0040] Optionally, the cylinder assembly 4 includes a cylinder, an end cover and a stopper, the end cover is connected to the cylinder through the stopper to form an active chamber for the reciprocating movement of the piston; the active chamber is connected to the moving channel; the cylinder is connected to the valve body 1, and the valve stem 5 is inserted through the end cover and connected to the piston. When the cylinder and the valve body 1 are connected together, the end cover is fixed in the cylinder through the stopper, the piston is located in the active chamber formed by the end cover and the cylinder, and the valve stem 5 is inserted through the end cover and enters the moving channel of the valve body 1. The piston drives the valve stem 5 to reciprocate synchronously to adjust the position of the connecting channel. With the above-mentioned cylinder assembly 4, the structure is relatively simple and can meet the driving requirements of the valve stem 5.

[0041] Optionally, the outer surface of the end cover is provided with at least one second mounting groove distributed along the circumferential direction, and the end cover sealing ring 3 is provided in the second mounting groove. When the end cover sealing ring 3 is installed in the second mounting groove, the end cover sealing ring 3 is deformed to improve the connection stability. At the same time, the end cover sealing ring 3 protrudes from the second mounting groove and is squeezed with the cylinder barrel to improve the sealing performance of the end cover.

[0042] Optionally, the inner surface of the end cover is provided with at least one third mounting groove distributed along the circumferential direction, and a valve stem sealing ring 7 is provided in the third mounting groove, and the valve stem sealing ring 7 is sleeved on the valve stem 5. When the valve stem 5 is inserted into the end cover, the valve stem sealing ring 7 is sleeved on the valve stem 5 and installed in the third mounting groove. With the above structure, the valve stem sealing ring 7 can prevent the valve stem 5 from carrying the driving medium in the cylinder into the moving channel.

[0043] Optionally, the stopper is a stop ring 2, which is sleeved and fixed on the end cover, and a stop groove is provided in the cylinder, in which the stop ring 2 is arranged. The stop ring 2 is sleeved on the end cover, and the end cover is connected to the stop groove through the stop ring 2, so that the end cover can be relatively fixed in the cylinder to avoid movement as the valve stem 5 moves.

[0044] In addition, optionally, at least one fourth mounting groove distributed along the circumferential direction is provided on the piston, and a piston sealing ring 6 is provided in the fourth mounting groove. When the piston sealing ring 6 is installed in the fourth mounting groove, the piston sealing ring 6 is deformed to improve the connection stability. At the same time, the piston sealing ring 6 protrudes from the fourth mounting groove and is squeezed with the cylinder barrel to improve the sealing performance of the piston.

[0045] The following further introduces the use process of the injection valve.

[0046] The piston moves in the cylinder toward the side away from the valve body 1, so that the valve stem 5 moves to the connecting channel to connect with the liquid inlet channel, and the connecting channel of the valve stem 5 is connected with the liquid outlet channel, and the liquid in the liquid inlet channel enters the liquid outlet channel through the connecting channel, that is, the injection valve is opened.

[0047] The piston moves toward the valve body 1 in the cylinder, so that the valve stem 5 moves to the connecting channel and the liquid inlet channel. Because the valve stem 5 contacts the liquid inlet channel, the valve stem 5 blocks the liquid in the liquid inlet channel from flowing out, that is, the injection valve is closed.

[0048] The two valve body sealing rings 8 prevent the liquid flowing out of the liquid inlet channel from overflowing. When there are crystals on the valve stem 5 and the valve stem 5 moves relative to the valve body sealing ring 8, the valve body sealing ring 8 can remove the crystals on the valve stem 5.

[0049] The piston seal ring 6, the valve stem seal ring 7 and the end cover seal ring 3 can provide sealing for the drive mechanism to prevent leakage of the drive medium.

[0050] From the above description and practice, it can be seen that the injection valve provided by the present application has the following advantages compared with the prior art: when the valve stem reciprocates in the valve body, the position of the connecting channel is controlled to connect or disconnect the liquid inlet channel and the liquid outlet channel. The valve body sealing ring can not only isolate the liquid from overflowing and control the crystallization range on the valve stem, but also apply force to the valve stem to remove the existing crystals, thereby ensuring the sealing effect of the injection valve and extending the service life of the injection valve.

[0051] A person skilled in the art should understand that the above description is only a specific embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present application should be included in the protection scope of the present application.

Claims

1. A liquid injection valve, characterized in that: include: A valve body, the valve body comprising a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet being connected via a liquid inlet channel, a moving channel and a liquid outlet channel; a valve stem, the valve stem being movably connected in the movable channel, the valve stem being provided with a communication channel, the communication channel being able to connect the liquid inlet channel and the liquid outlet channel; Two valve body sealing rings, which are respectively arranged on opposite sides of the liquid inlet channel and are both sleeved on the valve stem, and the valve stem can reciprocate relative to the valve body sealing rings; A driving mechanism is connected to the valve stem and can drive the valve stem to move back and forth in the moving channel.

2. The liquid injection valve according to claim 1, characterized in that: Two first installation grooves are arranged in the valve body, and the two first installation grooves are respectively arranged on opposite sides of the liquid inlet channel and are both arranged around the moving channel; the valve body sealing ring is arranged in the first installation groove.

3. The liquid injection valve according to claim 1 or 2, characterized in that: The communication channel includes an axial channel and at least one radial channel communicating with the axial channel, the axial channel is communicating with the liquid outlet channel, and the radial channel can be communicating with the liquid inlet channel.

4. The liquid injection valve according to claim 3, characterized in that: The valve stem is provided with flow guide grooves distributed along the circumferential direction, and the inlet end of the radial channel is arranged in the flow guide grooves.

5. The liquid injection valve according to claim 1 or 2, characterized in that: The driving mechanism comprises a cylinder assembly and a piston movably connected in the cylinder assembly, wherein the cylinder assembly is connected to the valve body, and the piston is connected to the valve stem.

6. The liquid injection valve according to claim 5, characterized in that: The cylinder assembly includes a cylinder, an end cover and a stopper, wherein the end cover is connected to the cylinder through the stopper to form an active chamber for the reciprocating movement of the piston; the active chamber is connected to the moving channel; the cylinder is connected to the valve body, and the valve stem is passed through the end cover and connected to the piston.

7. The liquid injection valve according to claim 6, characterized in that: The outer surface of the end cover is provided with at least one second installation groove distributed along the circumferential direction, and an end cover sealing ring is arranged in the second installation groove.

8. The liquid injection valve according to claim 7, characterized in that: The inner surface of the end cover is provided with at least one third installation groove distributed along the circumferential direction, a valve stem sealing ring is provided in the third installation groove, and the valve stem sealing ring is sleeved on the valve stem.

9. The liquid injection valve according to claim 6, characterized in that: The stopper is a stop ring, the stop ring is sleeved and fixed on the end cover, a stop groove is arranged in the cylinder, and the stop ring is arranged in the stop groove.

10. The liquid injection valve according to claim 5, characterized in that: The piston is provided with at least one fourth installation groove distributed along the circumferential direction, and a piston sealing ring is provided in the fourth installation groove.

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