Piezoelectric injection valve with limiting function

Abstract

The utility model relates to the field of piezoelectric injection valves, and discloses a piezoelectric injection valve with a limiting function, the piezoelectric injection valve comprises an injection valve body and a liquid filling pipe, the injection valve body is provided with an assembly interface, the bottom of the liquid filling pipe is provided with an assembly pipe connected with the assembly interface in an inserted mode, and a sealing ring is arranged outside the assembly pipe and is flexible; the assembling connector is located between the assembling pipe and the sealing ring. The sealing ring is arranged outside the assembling pipe and matched with the first limiting assembly, the second limiting assembly and the driving assembly, the driving assembly enables the first limiting assembly and the second limiting assembly to move synchronously, and the sealing ring and the second limiting assembly are matched to better adapt to tiny unevenness or gaps between the assembling connector and the assembling pipe; therefore, the sealing effect is improved, the risk of liquid leakage is reduced, meanwhile, in the assembling process, positioning of the liquid containing pipe and tight butt joint of the assembling connector and the assembling pipe can be achieved at the same time, the assembling steps are simplified, and the running stability of the injection valve body is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of piezoelectric injection valves, and particularly relates to a piezoelectric injection valve with a limiting function. BACKGROUND

[0002] The piezoelectric injection valve is used for driving equipment by mechanical force generated by voltage through the characteristics of piezoelectric material, thereby realizing the opening and closing of the valve. Because the valve port space of the on-off valve is extremely small, and the mechanical operation of the piezoelectric driving striker is extremely high, the piezoelectric injection valve can realize the high-speed injection of a small amount of liquid material. Therefore, the piezoelectric injection valve is widely used in the field of high-precision and high-reliability dispensing. However, it is found in the assembly process of the piezoelectric injection valve that the assembly of the liquid filling pipe is realized by the thread connection between the traditional assembly port and the thread on the inner wall of the pipe port of the traditional liquid filling pipe. In the replacement process of the liquid filling pipe, the residual glue liquid in the pipe flows into the thread gap of the assembly port and solidifies. Such residual glue is not easy to clean, which makes the assembly of the liquid filling pipe difficult to fit well with the assembly port in the next time, thereby bringing great difficulty to the work of the staff.

[0003] The existing piezoelectric injection valve with publication number CN218655224U includes a valve body and a limiting device. The lower surface of the valve body is fixedly connected with a jet port. The surface of the valve body is provided with an assembly port. The circular surface of the assembly port is slidably connected with a liquid filling pipe. The inner wall of the pipe port of the liquid filling pipe is slidably connected with the circular surface of the assembly port. The circular surface of the liquid filling pipe is slidably connected with the surface of the valve body. The side of the valve body close to the liquid filling pipe is provided with the limiting device. The limiting device includes a limiting column. The surface of the limiting column is uniformly fixedly connected with two limiting plates. The surface of the two limiting plates is fixedly connected with the surface of the valve body. The surface of the two limiting plates is provided with two threaded holes. The problem that the residual glue liquid is left in the assembly port when the liquid filling pipe is replaced, thereby increasing the difficulty and workload of the assembly of the liquid filling pipe in the next time is solved.

[0004] In view of the above prior art, although the circular surface of the liquid filling pipe is slidably connected with the surface of the valve body, the assembly of the liquid filling pipe and the assembly port of the valve body is a sliding connection. Although the limiting assembly is provided, the limiting assembly is used for keeping the position of the liquid filling pipe stable. When a liquid with strong fluidity is used, the liquid will overflow from the connection between the liquid filling pipe and the valve body with the operation of the valve body. The overflow liquid not only wastes resources, but also causes the unstable injection amount of the valve body, thereby affecting the injection quality. In order to solve the above problems, the present application provides a piezoelectric injection valve with a limiting function.

[0005] The above information disclosed in this BACKGROUND section is only for increasing the understanding of the background of the present application, and therefore, it can include information that is not prior art known to those of ordinary skill in the art. Utility model content

[0006] In order to solve the problem of piezoelectric injection valve, the application provides a piezoelectric injection valve with limiting function.

[0007] The piezoelectric injection valve with limiting function provided by the application adopts the following technical scheme:

[0008] A piezoelectric injection valve with limiting function, comprising a injection valve body and a liquid filling pipe, the injection valve body is provided with an assembly interface, the bottom of the liquid filling pipe is provided with an assembly pipe which is inserted into the assembly interface, the outside of the assembly pipe is provided with a sealing ring, the sealing ring is flexible, the assembly interface is located between the assembly pipe and the sealing ring, the side of the injection valve body close to the liquid filling pipe is provided with a limiting assembly one for limiting and fixing the liquid filling pipe and a limiting assembly two for limiting and fixing the insertion part of the assembly pipe and the assembly interface, and a driving assembly is further arranged between the limiting assembly one and the limiting assembly two to synchronize the movement of the limiting assembly one and the limiting assembly two.

[0009] Preferably, the limiting assembly one comprises a connecting frame one, a guide groove one, a sliding block one, a bidirectional screw rod one and a clamping plate one, the connecting frame one is fixed on the side of the injection valve body close to the liquid filling pipe, the guide groove one is arranged on the connecting frame one, the sliding block one slides in the guide groove one, the bidirectional screw rod one rotates on the connecting frame one, the sliding block one is threadedly connected with the bidirectional screw rod one, and the clamping plate one is fixed on the side of the sliding block one away from the guide groove one.

[0010] Preferably, the limiting assembly two comprises a connecting frame two, a guide groove two, a sliding block two, a bidirectional screw rod two, a clamping plate two and an antiskid pad, the connecting frame two is fixed on the side of the injection valve body close to the liquid filling pipe, the guide groove two is arranged on the connecting frame two, the bidirectional screw rod two rotates on the connecting frame two, the sliding block two slides in the guide groove two, the sliding block two is threadedly connected with the bidirectional screw rod two, the clamping plate two is fixed on the side of the sliding block two away from the guide groove two, and the antiskid pad is fixed on the inner side of the clamping plate two.

[0011] Preferably, the driving assembly comprises a belt pulley one, a belt pulley two, a belt and a rocker, the belt pulley one is fixed with the bidirectional screw rod one, the belt pulley two is fixed with the bidirectional screw rod two, the belt is sleeved on the belt pulley one and the belt pulley two at the same time, the rocker is fixed with the belt pulley two, the belt pulley one rotates on one side of the connecting frame one, and the belt pulley two rotates on one side of the connecting frame two.

[0012] Preferably, the clamping plate one and the clamping plate two are provided with two, and the two clamping plate one and the two clamping plate two can be synchronized to each other or away from each other.

[0013] Preferably, the injection valve body bottom is provided with a liquid injection port.

[0014] In summary, compared with the related art, the utility model has the beneficial effects that:

[0015] By setting the sealing ring outside the assembly pipe, cooperating with the limiting assembly one, the limiting assembly two and the driving assembly, the driving assembly enables the limiting assembly one and the limiting assembly two to move synchronously, compared with the related art, the cooperation of the sealing ring and the limiting assembly two can better adapt to the slight unevenness or gap between the assembly interface and the assembly pipe, thereby improving the sealing effect and reducing the risk of liquid leakage, at the same time, during the assembly process, the positioning of the liquid filling pipe and the close butt joint of the assembly interface and the assembly pipe can be realized at the same time, which not only simplifies the assembly steps, but also improves the stability of the operation of the injection valve body. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall structure schematic diagram of the application embodiment;

[0017] Figure 2 It is Figure 1 the enlarged structure schematic diagram of A in the figure.

[0018] Figure 3 It is the local side cross-sectional structure schematic diagram of the application embodiment;

[0019] Figure 4 It is the limiting assembly side cross-sectional structure schematic diagram of the application embodiment;

[0020] Figure 5 It is the limiting assembly overhead structure schematic diagram of the application embodiment;

[0021] Figure 6 It is the sealing ring structure schematic diagram of the application embodiment.

[0022] The figure mark explanation: 1, the injection valve body; 2, liquid filling pipe; 3, liquid injection port; 4, assembly pipe; 5, sealing ring; 6, connecting frame one; 7, guide groove one; 8, sliding block one; 9, two-way screw rod one; 10, clamping plate one; 11, connecting frame two; 12, guide groove two; 13, sliding block two; 14, two-way screw rod two; 15, clamping plate two; 16, non-slip pad; 17, pulley one; 18, pulley two; 19, belt; 20, rocker; 21, assembly interface. DETAILED DESCRIPTION

[0023] The following will be combined with the Figures 1-6 The application is further described in detail.

[0024] The embodiment of the application discloses a piezoelectric injection valve with a limiting function. Figures 1-6 The piezoelectric injection valve with the limiting function comprises an injection valve body 1 and a liquid filling pipe 2, the injection valve body 1 is provided with an assembly interface 21, the bottom of the liquid filling pipe 2 is provided with an assembly pipe 4 which is inserted into the assembly interface 21, the assembly pipe 4 is externally provided with a sealing ring 5, the sealing ring 5 is flexible, the assembly interface 21 is located between the assembly pipe 4 and the sealing ring 5, one side of the injection valve body 1 close to the liquid filling pipe 2 is provided with a limiting assembly one for limiting and fixing the liquid filling pipe 2 and a limiting assembly two for limiting and fixing the insertion part of the assembly pipe 4 and the assembly interface 21, and a driving assembly for synchronously moving the limiting assembly one and the limiting assembly two is further arranged between the limiting assembly one and the limiting assembly two.

[0025] It should be noted that, since the sealing ring 5 is flexible, the sealing ring 5 can better maintain the sealing property of the connection part of the assembly pipe 4 and the assembly interface 21 under the action of the limiting assembly two, and the sealing ring 5 can be turned over for internal cleaning during subsequent cleaning.

[0026] By adopting the above technical scheme, when the assembly pipe 4 is inserted into the assembly interface 21, the sealing ring 5 can seal the connection part of the assembly pipe 4 and the assembly interface 21 by cooperating with the outer wall of the assembly pipe 4, the limiting assembly one and the limiting assembly two are synchronously moved by the driving assembly, the limiting assembly one supports and limits the position of the liquid filling pipe 2, and the limiting assembly two limits and fixes the connection part of the sealing ring 5, namely the connection part of the assembly pipe 4 and the assembly interface 21.

[0027] The limiting assembly one comprises a connecting frame one 6, a guide groove one 7, a sliding block one 8, a bidirectional screw rod one 9 and a clamping plate one 10. Figure 4 The connecting frame one 6 is fixed on one side of the injection valve body 1 close to the liquid filling pipe 2, the guide groove one 7 is arranged on the connecting frame one 6, the sliding block one 8 slides in the guide groove one 7, the bidirectional screw rod one 9 rotates on the connecting frame one 6, the sliding block one 8 is threadedly connected with the bidirectional screw rod one 9, and the clamping plate one 10 is fixed on one side of the sliding block one 8 away from the guide groove one 7.

[0028] It should be noted that one part of the threads on the bidirectional screw rod one 9 is left-handed thread and the other part is right-handed thread, and the two sliding blocks one 8 are threadedly connected with the left-handed thread and the right-handed thread respectively.

[0029] By adopting the above technical scheme, when the assembly pipe 4 is inserted into the assembly interface 21, the sealing ring 5 can seal the connection part of the assembly pipe 4 and the assembly interface 21 by cooperating with the outer wall of the assembly pipe 4, the limiting assembly one and the limiting assembly two are synchronously moved by the driving assembly, the limiting assembly one supports and limits the position of the liquid filling pipe 2, and the limiting assembly two limits and fixes the connection part of the sealing ring 5, namely the connection part of the assembly pipe 4 and the assembly interface 21.

[0030] The limiting assembly two comprises a connecting frame two 11, a guide groove two 12, a sliding block two 13, a bidirectional screw rod two 14 and a clamping plate two 15. Figure 4The second limiting assembly comprises a connecting frame 11, a guide groove 12, a sliding block 13, a bidirectional screw rod 14, a clamping plate 15 and an antiskid pad 16, the connecting frame 11 is fixed on one side of the injection valve body 1 close to the liquid filling pipe 2, the guide groove 12 is arranged on the connecting frame 11, the bidirectional screw rod 14 is rotatably arranged on the connecting frame 11, the sliding block 13 is slidably arranged in the guide groove 12, the sliding block 13 is threadedly connected with the bidirectional screw rod 14, the clamping plate 15 is fixed on one side of the sliding block 13 away from the guide groove 12, and the antiskid pad 16 is fixed on the inner side of the clamping plate 15.

[0031] It should be noted that the threaded connection relationship between the bidirectional screw rod 14 and the two sliding blocks 13 is the same as that between the bidirectional screw rod 9 and the two sliding blocks 8.

[0032] Through the above technical scheme, when assembling, the driving assembly drives the bidirectional screw rod 14 to rotate, and the two clamping plates 15 are guided by the guide groove 12 to approach each other until the antiskid pad 16 is attached to the surface of the sealing ring 5, thereby limiting and fixing the connection between the sealing ring 5, the assembly pipe 4 and the assembly interface 21, and the cooperation between the antiskid pad 16 and the sealing ring 5 can further maintain the sealing effect of the connection between the sealing ring 5, the assembly pipe 4 and the assembly interface 21.

[0033] With reference to Figure 2 The driving assembly comprises a belt pulley 17, a belt pulley 18, a belt 19 and a rocker 20, the belt pulley 17 is fixed with the bidirectional screw rod 9, the belt pulley 18 is fixed with the bidirectional screw rod 14, the belt 19 is sleeved on the belt pulley 17 and the belt pulley 18, and the rocker 20 is fixed with the belt pulley 18; the belt pulley 17 is rotatably arranged on one side of the connecting frame 6, and the belt pulley 18 is rotatably arranged on one side of the connecting frame 11.

[0034] The two clamping plates 10 and the two clamping plates 15 can approach or move away from each other synchronously.

[0035] Through the above technical scheme, rotating the rocker 20 drives the belt pulley 18 to rotate the bidirectional screw rod 14, and under the transmission of the belt 19, the belt pulley 17 synchronously drives the bidirectional screw rod 9 to rotate, thereby realizing the synchronous movement of the two clamping plates 10 and the two clamping plates 15, and further realizing the simultaneous support and limiting of the liquid filling pipe 2 and the limiting and fixing of the connection between the assembly pipe 4 and the assembly interface 21.

[0036] With reference to Figure 1 The bottom of the injection valve body 1 is provided with a liquid injection port 3.

[0037] Through the above technical scheme, the liquid in the liquid filling pipe 2 flows into the injection valve body 1 through the assembly pipe 4 and is sprayed out from the liquid injection port 3 through the internal liquid conveying pipe.

[0038] The implementation principle of the piezoelectric injection valve with the limiting function is as follows: during assembly, the assembly pipe 4 is inserted into the assembly interface 21, the sealing ring 5 covers the connection between the assembly pipe 4 and the assembly interface 21 at the same time, the rocker 20 is shaken to drive the belt pulley two 18 to rotate the bidirectional screw rod two 14, under the transmission of the belt 19, the belt pulley one 17 is synchronously driven to rotate the bidirectional screw rod one 9, the two clamping plates one 10 and the two clamping plates two 15 are synchronously close to each other, the two clamping plates one 10 are close to each other to be attached to the surface of the liquid filling pipe 2, and the liquid filling pipe 2 is limited and supported, the two clamping plates two 15 are close to each other to be attached to the surface of the sealing ring 5, and the sealing ring 5, i.e., the connection between the assembly pipe 4 and the assembly interface 21, is limited and fixed.

[0039] Finally, it should be pointed out that: first, in the description of the application, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be broadly understood, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change;

[0040] Secondly: the utility model discloses the embodiment of the drawings, only relate to the structure involved in the embodiment of the present disclosure, other structures can refer to the usual design, under the condition of no conflict, the same embodiment and different embodiments of the utility model can be combined with each other.

[0041] Finally: the above only for the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement etc.

[0042] The above are the preferred embodiments of the present application, and are not used to limit the protection scope of the present application, so: any equivalent change made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A piezoelectric injection valve with a limiting function, comprising an injection valve body (1) and a liquid loading pipe (2), characterized in that: The injection valve body (1) is provided with an assembly interface (21). The bottom of the liquid filling tube (2) is provided with an assembly tube (4) that is inserted into the assembly interface (21). The assembly tube (4) is provided with a sealing ring (5) on the outside. The sealing ring (5) is flexible. The assembly interface (21) is located between the assembly tube (4) and the sealing ring (5). The side of the injection valve body (1) near the liquid filling tube (2) is provided with a limiting component one for limiting and fixing the liquid filling tube (2) and a limiting component two for limiting and fixing the insertion point of the assembly tube (4) and the assembly interface (21). A driving component is also provided between the limiting component one and the limiting component two to make the limiting component one and the limiting component two move synchronously.

2. The piezoelectric injection valve with a limiting function according to claim 1, characterized in that: The limiting component includes a connecting frame (6), a guide groove (7), a slider (8), a two-way screw (9), and a clamping plate (10). The connecting frame (6) is fixed on the side of the injection valve body (1) near the liquid filling pipe (2). The guide groove (7) is opened on the connecting frame (6). The slider (8) slides in the guide groove (7). The two-way screw (9) rotates on the connecting frame (6). The slider (8) is threadedly connected to the two-way screw (9). The clamping plate (10) is fixed on the side of the slider (8) away from the guide groove (7).

3. A piezoelectric injection valve with a limiting function according to claim 2, characterized in that: The limiting component two includes a connecting frame two (11), a guide groove two (12), a slider two (13), a two-way screw two (14), a clamping plate two (15), and an anti-slip pad (16). The connecting frame two (11) is fixed on the side of the injection valve body (1) near the liquid filling pipe (2). The guide groove two (12) is opened on the connecting frame two (11). The two-way screw two (14) rotates on the connecting frame two (11). The slider two (13) slides in the guide groove two (12). The slider two (13) is threadedly connected to the two-way screw two (14). The clamping plate two (15) is fixed on the side of the slider two (13) away from the guide groove two (12). The anti-slip pad (16) is fixed inside the clamping plate two (15).

4. A piezoelectric injection valve with a limiting function according to claim 3, characterized in that: The drive assembly includes a pulley one (17), a pulley two (18), a belt (19), and a rocker arm (20). The pulley one (17) is fixed to a double-acting lead screw one (9), the pulley two (18) is fixed to a double-acting lead screw two (14), the belt (19) is simultaneously sleeved on the pulley one (17) and the pulley two (18), the rocker arm (20) is fixed to the pulley two (18), the pulley one (17) rotates on one side of the connecting frame one (6), and the pulley two (18) rotates on one side of the connecting frame two (11).

5. A piezoelectric injection valve with a limiting function according to claim 3, characterized in that: Two clamps (10) and two clamps (15) are provided, and the two clamps (10) and the two clamps (15) can move closer to each other or move further away from each other simultaneously.

6. A piezoelectric injection valve with a limiting function according to claim 1, characterized in that: The bottom of the injection valve body (1) is provided with a liquid injection port (3).

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