A contact injection needle structure

Abstract

The application relates to the technical field of food processing and discloses a contact type injection needle structure which comprises a stroke driving module, a plurality of injection needle bodies, a plurality of pressure detection units and a liquid delivery module. The liquid delivery module comprises a liquid inlet end, a plurality of valve bodies and a liquid outlet end, the output end of each valve body is in communication with the injection needle body, and the injection needle body is fixedly arranged at the driving end of the stroke driving module. The needle head end of each injection needle body is provided with a pressure detection unit, and when the pressure between the pressure detection unit and a to-be-injected body reaches a specified threshold value, the valve body is driven to open to inject liquid into the to-be-injected body through the injection needle body. The stroke driving module can drive different injection needle bodies to be pressed down respectively, the valve body is controlled to be turned on and turned off by the pressure detection unit, and injection is started only when the needle head enters the to-be-injected body. A plurality of to-be-cured products can be independently injected with brine, the injection of the brine does not affect each other, the scale quantity can be adjusted according to requirements, and waste of the injection liquid is avoided.

Description

Technical Field

[0001] This application relates to the technical field of food processing, and in particular to a contact injection needle structure. Background Technology

[0002] With the rapid development of the food industry, traditional needle injection devices can no longer fully meet the current needs in the process of injecting liquid into food ingredients for marinating. Traditional needle injection devices often adopt the control concept of opening and closing all needles at the same time, which often results in problems such as inaccurate dosage control and uneven injection.

[0003] Traditional needle injection devices have a simple structure, making it difficult to adapt to the shape variations of different raw materials. This can easily lead to injection position deviation. Furthermore, traditional needle injection cannot flexibly adjust the amount of liquid and the injection force according to the size, thickness, and shape of the raw materials, resulting in liquid overflow or insufficient dosage. In such cases, the quality of the final pickled product will be affected, leading to waste of raw materials, significantly increasing production costs, lengthening production time, and resulting in low production efficiency. Summary of the Invention

[0004] To address the issues of inaccuracy and low efficiency in traditional needle injection methods, this application provides a contact needle injection structure.

[0005] This utility model provides a contact injection needle structure, which adopts the following technical solution:

[0006] A contact injection needle structure includes a stroke drive module, multiple injection needle bodies, multiple pressure detection units, and a liquid delivery module;

[0007] The liquid delivery module includes an inlet end, multiple valve bodies, and an infusion end. The output end of each valve body is connected to the injection needle body, and the injection needle body is fixedly mounted on the drive end of the stroke drive module.

[0008] Each of the injection needles is equipped with a pressure detection unit at its tip. When the pressure between the pressure detection unit and the body to be injected reaches a specified threshold, the pressure detection unit drives the valve to open and inject liquid into the body through the injection needle.

[0009] By adopting the above technical solution, the stroke drive module can drive different injection needles to press down, and the pressure detection unit controls the valve body to open and close. Multiple products to be pickled can be injected with salt solution independently without affecting each other, and the scale and quantity can be adjusted according to needs. In addition, the setting of the pressure detection unit enables the injection needle to start injecting only when the needle tip enters the product to be injected, avoiding liquid waste caused by premature injection.

[0010] Optionally, the pressure detection unit includes a pressure plate and an injection drive assembly, the injection drive assembly including a valve stem, a valve plate, a valve seat, and a connecting rod;

[0011] The valve plate is fixed to one end of the connecting rod, the pressure plate is fixed to the other end of the connecting rod, and the valve rod is detachably connected to the valve plate;

[0012] The connecting rod and the valve stem are arranged in parallel and are both elastically slidably disposed in the valve seat.

[0013] By adopting the above technical solution, the pressure detection unit controls the operation of the injection drive assembly through the signal detected by the pressure plate. When the pressure plate contacts the body to be injected, it is subjected to the reverse pressure of the body to be injected, and the pressure plate is lifted. The spring on the connecting rod drives the valve plate to move upward along with the pressure plate. As the valve plate moves upward, the valve rod opens the valve body through the valve rod spring.

[0014] Optionally, the pressure detection unit includes a pressure sensing unit, a processing drive unit, an air valve, and an air supply pipe; each injection needle body is provided with the pressure sensing unit at its needle tip end, the air valve and the valve body are electrically connected to the processing drive unit, and the air supply pipe is connected to the connection between the injection needle body and the valve body through the air valve;

[0015] When the pressure between the pressure sensing unit and the injectable body reaches the specified threshold, the processing drive unit then drives the valve body to open.

[0016] When the pressure is less than the specified threshold and greater than or equal to the stop threshold, the processing drive unit drives the valve body to close while simultaneously driving the air valve to open.

[0017] When the pressure is less than the specified threshold and less than the stop threshold, the processing drive unit then drives the air valve to close.

[0018] By adopting the above technical solution, when the stroke drive module drives the injection needle away from the body to be injected, the pressure will decrease. When the pressure decreases to a range that is less than the specified threshold and greater than or equal to the stop threshold, the needle has not yet left the body to be injected. At this time, the drive air valve opens and air is introduced through the air supply pipe to discharge the liquid remaining in the injection needle and avoid liquid residue.

[0019] Optionally, the injection needle body includes a needle tip, a needle tube, and a locking handle. The pressure plate is detachably connected to the needle tube, and the loading and unloading of the injection needle body is controlled by shaking the locking handle.

[0020] By adopting the above technical solution, it is convenient to change the pressure plate of different shapes according to the shape and material of the body to be injected, which is conducive to the accurate control of the injection liquid volume.

[0021] Optionally, the infusion end includes multiple drainage tubes and multiple hose connectors, with one end of each drainage tube connected to the output end of the valve body via the hose connector, and the other end connected to the needle tube.

[0022] By adopting the above technical solution, the hose connector can be tightly connected to the valve tube to avoid liquid leakage, and the drainage tube transports the liquid to the needle tube to ensure smooth liquid flow.

[0023] Optionally, when the pressure between the pressure sensing unit and the body to be injected reaches the specified threshold, the processing drive unit pauses the downward pressure drive in driving the stroke drive module.

[0024] By adopting the above technical solution, when the pressure between the pressure sensing unit and the injectable body reaches the specified threshold, the processing drive unit stops the downward pressure drive of the stroke drive module, thus avoiding excessive compression of the injectable body by the pressure plate and affecting the liquid injection effect.

[0025] Optionally, the pressure detection unit further includes a flow detection unit connected to the processing drive unit. The flow detection unit is installed at the needle tip of the injection needle body and is used to obtain the liquid output volume of the injection needle body. When the pressure increases from zero, the processing drive unit drives the valve body to open. When the liquid output volume is greater than a specified pause flow threshold, the processing drive unit drives the valve body to close.

[0026] By adopting the above technical solution, the early opening of the valve body can prepare for the injection of liquid into the injection needle body. The residual air in the needle tube is emptied by liquid compression, avoiding uneven or insufficient liquid injection caused by residual air.

[0027] Optionally, when the liquid output exceeds a specified flow stop threshold, the processing drive unit drives the valve body to close.

[0028] By adopting the above technical solution, the early closing of the valve body can avoid excessive liquid release, and at the same time, it can avoid the problem of excessive liquid residue in the pipeline, while ensuring that the injectable body will not be over-injected.

[0029] The beneficial effects of this utility model are:

[0030] (1) The stroke drive module of this utility model can drive different injection needles to press down, and the pressure detection unit controls the valve body to open and close. It can independently inject salt solution into multiple products to be pickled without affecting each other, and the scale and quantity can be adjusted according to needs. In addition, the setting of the pressure detection unit can make the injection needle start injecting only when the needle tip enters the product to be injected, avoiding liquid waste caused by premature injection of the injection needle.

[0031] (2) In this utility model, when the stroke drive module drives the injection needle body away from the body to be injected, the pressure will decrease. When the pressure decreases to a range that is less than the specified threshold and greater than or equal to the stop threshold, the needle has not yet left the body to be injected. At this time, the drive air valve is opened and air is introduced through the air supply pipe to discharge the liquid remaining in the injection needle body and avoid liquid residue.

[0032] (3) This utility model is equipped with multiple independent pressure plates and injection needles, which makes it easy to replace pressure plates of different shapes according to the shape and material of the body to be injected, which is beneficial to the accurate control of the injection volume. The infusion end includes multiple drainage tubes and multiple hose connectors. The hose connectors can be tightly connected to the valve tube to avoid liquid leakage. The drainage tubes transport the liquid to the needle tube to ensure smooth flow of the liquid.

[0033] (4) The present invention is provided with a pressure sensing unit. When the pressure between the pressure sensing unit and the body to be injected reaches the specified threshold, the processing drive unit stops the downward pressure drive in driving the stroke drive module, so as to avoid the pressure plate from excessively squeezing the body to be injected and affecting the liquid injection effect.

[0034] (5) In this utility model, the early opening of the valve body can prepare for the injection of liquid by the injection needle body. The residual air in the needle tube is emptied by liquid squeezing, so as to avoid uneven or insufficient liquid injection caused by residual air. The early closing of the valve body can avoid the situation of excessive liquid release, and at the same time, it can avoid the problem of excessive liquid remaining in the pipeline, and ensure that the injectable body will not be over-injected. Attached Figure Description

[0035] Figure 1 This is a frontal overall structural cross-sectional view of the contact injection needle structure in this application;

[0036] Figure 2 This is a side view of the overall structure of the contact injection needle in this application;

[0037] Figure 3 This is a partial structural schematic diagram of Embodiment 1 of the contact injection needle structure in this application;

[0038] Figure 4 This is a schematic diagram of the pressure sensing unit in Embodiment 1 of the contact injection needle structure in this application;

[0039] Figure 5 This is a schematic diagram of the air valve related structure of Embodiment 2 of the contact injection needle structure in this application.

[0040] Reference numerals: 1. Pressure plate; 2. Valve body; 3. Pressure sensing unit; 4. Air valve; 5. Injection needle body; 6. Pipeline; 22. Valve plate; 23. Valve stem spring; 24. Valve seat; 25. Connecting rod; 26. Spring; 27. Liquid inlet; 28. Infusion end; 41. Air inlet tube; 51. Needle; 52. Needle tube; 53. Locking handle; 61. Drainage tube; 62. Hose connector. Detailed Implementation

[0041] The embodiments of this application are described in detail below, and examples of the embodiments are shown in the accompanying drawings.

[0042] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] This utility model discloses a contact injection needle structure. Please refer to the attached drawings. Figure 1 and Figure 2 As shown, it includes a stroke drive module, multiple injection needles 5, multiple pressure detection units, and a liquid delivery module. The stroke drive module uses a cylinder or an electric cylinder to drive the injection needles and related structures to move up and down.

[0044] The injection needle body 5 includes a needle tip 51, a needle tube 52, and a locking handle 53, which can be used to install and fix the injection needle body 5. The liquid delivery module includes an inlet end 27, multiple valve bodies 2, and an infusion end 28. The infusion end 28 includes multiple drainage tubes 61 and multiple hose connectors 62. One end of each drainage tube 61 is connected to the output end of the valve body 2 through the hose connector 62, and the other end is connected to the needle tube 52.

[0045] Each of the injection needles 5 is equipped with a pressure detection unit at the tip 51. When the pressure between the pressure detection unit and the body to be injected reaches a specified threshold, the pressure detection unit drives the valve body 2 to open and inject liquid into the body to be injected through the injection needle 5.

[0046] As an embodiment of this utility model, please refer to the accompanying drawings. Figure 2 and Figure 3 As shown, the pressure detection unit includes a pressure plate 1 and an injection drive assembly. The pressure plate 1 is detachably connected to the needle tube 52. The injection drive assembly includes a valve body 2, a valve stem 21, a valve plate 22, a valve stem spring 23, a valve seat 24, a connecting rod 25, and a spring 26.

[0047] For one of the pressure detection units, please refer to the accompanying drawings. Figure 3 As shown, the pressure detection unit includes a pressure plate 1 and an injection drive assembly. The injection drive assembly includes a valve stem 21, a valve plate 22, a valve seat 24, and a connecting rod 25. The valve plate 22 is fixed to one end of the connecting rod 25, and the pressure plate 1 is fixed to the other end of the connecting rod 25. The valve stem 21 is detachably connected to the valve plate 22. The connecting rod 25 and the valve stem 21 are arranged in parallel and are elastically slidably disposed in the valve seat 24. Both ends of the connecting rod 25 are connected to the spring 26 by a hinge, allowing the connecting rod 25 to move freely within the elastic range of the spring 26 and also providing a buffering effect. The valve stem 21 is also hinged to the valve stem spring 23, which also provides shock absorption for the valve stem 21. In this embodiment, the specified threshold is set based on the directional force of the injectable material on the pressure plate 1, which is related to the expected injection depth of the injectable material and the stroke of other related structures such as the valve stem spring 23. In this embodiment, the specified threshold is set to 10N and the stop threshold is set to 9.5N.

[0048] In this embodiment, the working process is as follows:

[0049] When the cylinder drives the injection needle body 5 and the pressure plate 1 to press down simultaneously, the pressure plate 1 contacts the body to be injected and is subjected to the reverse pressure of the body to be injected, causing the pressure plate 1 to lift up and simultaneously drive the connecting rod 25 and the valve plate 22 to move upward against the elastic force of the spring 26. The valve plate 22 drives the valve rod 21 to move upward synchronously against the elastic force of the valve rod spring 23. When the pressure plate 1 receives a pressure value that reaches the specified threshold, the needle 51 also reaches the specified depth of the body to be injected. At this time, the valve body 2 is just opened by the valve rod 21, and the cylinder also reaches the maximum downward limit stroke. Liquid can be injected into the body to be injected through the injection needle body 5.

[0050] When the injection drive assembly moves upward, the pressure plate 1 gradually moves away from the body to be injected, and the spring 26 on the connecting rod 25 generates a downward force that acts on the valve stem 21, causing the valve stem 21 to close the valve body 2, thereby blocking the flow of brine.

[0051] As a second embodiment of this utility model, please refer to the accompanying drawings. Figure 4 and Figure 5 As shown, the pressure detection unit includes a pressure sensing unit 3, a processing and driving unit, an air valve 4, and an air supply pipe 41; the processing and driving unit can be a 51 microcontroller; the pressure sensing unit 3 can be a positive or negative pressure sensor, which is set on the outer wall of the needle tube 52 near the end of the needle tip 51.

[0052] Each needle tube 52 is provided with a pressure sensing unit 3 near the end of the needle tip 51. The air valve 4 and the valve body 2 are electrically connected to the processing drive unit. The air supply tube 41 is connected to the injection needle body 5 and the valve body 2 through the air valve 4.

[0053] It also includes a flow detection unit 7 connected to the processing drive unit. The flow detection unit 7 may be a throttling flow meter, which is installed on the inner wall of the end of the needle tube 52 near the needle tip 51, and is used to obtain the liquid output of the injection needle body 5.

[0054] In this embodiment, the working process is as follows:

[0055] When the cylinder drives the injection needle body 5 and the pressure sensing unit 3 to press down, the pressure sensing unit 3 comes into contact with the body to be injected and is subjected to the reverse pressure of the body to be injected. The pressure sensing unit 3 transmits the pressure signal to the processing drive unit for processing.

[0056] When the pressure increases from zero, it indicates that the needle 51 has just come into contact with the body to be injected and the syringe 52 is filled with air. The syringe needs to be filled with liquid. At this time, the processing drive unit drives the valve body 2 to open, and the valve body 2 begins to input liquid into the drainage tube 61. When the liquid output is equal to the specified pause flow threshold of 0.001 ml (set according to the volume of the syringe), the processing drive unit drives the valve body 2 to close, and the syringe is filled with liquid.

[0057] When the pressure between the pressure sensing unit 3 and the body to be injected reaches the specified threshold, the processing drive unit drives the cylinder to stop pressing down and simultaneously drives the valve body 2 to open, continuing to inject liquid; when the liquid output exceeds the specified flow stop threshold of 10ml (set according to the liquid injection requirements of the body to be injected), the processing drive unit drives the valve body 2 to close, and the valve body 2 no longer inputs liquid; in this way, the injection volume of saline can be controlled to avoid over-injection.

[0058] When the cylinder drives the injection needle body 5 and the pressure sensing unit 3 to rise, the pressure will decrease. When the pressure is less than the specified threshold of 10N and greater than or equal to the stop threshold of 9.5N (configured according to the timing that the injection should stop and the liquid in the syringe should be emptied during the process of the needle leaving the body to be injected, that is, the needle has not completely left the body to be injected), the processing drive unit drives the valve body 2 to close and the air valve 4 to open, so as to discharge the residual liquid in the syringe, reduce liquid waste and avoid liquid residue.

[0059] When the pressure is less than the stop threshold of 9.5N, the processing drive unit drives the air valve 4 to close, stopping the action of purging liquid through gas (the opening time of the air valve 4 is related to the syringe volume and gas flow rate). More precisely, when the liquid output exceeds the specified flow stop threshold of 10ml, the air valve 4 is driven to close, which can more accurately stop the purging of liquid and prevent air from being injected into the injectable body.

[0060] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A contact injection needle structure, characterized in that, Includes a stroke drive module, multiple injection needles (5), multiple pressure detection units, and a liquid delivery module; The liquid delivery module includes an inlet end (27), multiple valve bodies (2), and an infusion end (28). The output end of each valve body (2) is connected to the injection needle body (5), and the injection needle body (5) is fixedly installed at the drive end of the stroke drive module. Each of the injection needles (5) is provided with a pressure detection unit at the tip (51). When the pressure between the pressure detection unit and the body to be injected reaches a specified threshold, the valve body (2) is driven to open and liquid is injected into the body to be injected through the injection needle (5).

2. The contact injection needle structure according to claim 1, characterized in that, For one of the pressure detection units, the pressure detection unit includes a pressure plate (1) and an injection drive assembly, the injection drive assembly including a valve stem (21), a valve plate (22), a valve seat (24) and a connecting rod (25). The valve plate (22) is fixed to one end of the connecting rod (25), the pressure plate (1) is fixed to the other end of the connecting rod (25), and the valve rod (21) is detachably connected to the valve plate (22). The connecting rod (25) and the valve stem (21) are arranged in parallel and are elastically slidably disposed in the valve seat (24).

3. The contact injection needle structure according to claim 1, characterized in that, The pressure detection unit includes a pressure sensing unit (3), a processing drive unit, an air valve (4), and an air supply pipe (41). Each of the injection needle bodies (5) is provided with a pressure sensing unit (3) at the tip (51) end. The air valve (4) and the valve body (2) are electrically connected to the processing drive unit. The air supply pipe (41) is connected to the injection needle body (5) and the valve body (2) through the air valve (4). When the pressure between the pressure sensing unit (3) and the injectable body reaches the specified threshold, the processing drive unit drives the valve body (2) to open. During the pressure reduction process, when the pressure is less than the specified threshold and greater than or equal to the stop threshold, the processing drive unit drives the valve body (2) to close and the air valve (4) to open at the same time. When the pressure is less than the specified threshold and less than the stop threshold, the processing drive unit drives the air valve (4) to close.

4. The contact injection needle structure according to claim 2, characterized in that, The injection needle body (5) includes a needle tip (51), a needle tube (52) and a locking handle (53). The pressure plate (1) is detachably connected to the needle tube (52). The loading and unloading of the injection needle body (5) is controlled by shaking the locking handle (53).

5. The contact injection needle structure according to claim 4, characterized in that, The infusion end includes a tubing (6), which includes multiple drainage tubes (61) and multiple hose connectors (62). One end of each drainage tube (61) is connected to the output end of the valve body (2) through the hose connector (62), and the other end is connected to the needle tube (52).

6. The contact injection needle structure according to claim 3, characterized in that, When the pressure between the pressure sensing unit (3) and the body to be injected reaches the specified threshold, the processing drive unit pauses the downward pressure drive in driving the stroke drive module.

7. The contact injection needle structure according to claim 3, characterized in that, The pressure detection unit also includes a flow detection unit (7) connected to the processing drive unit. The flow detection unit (7) is installed at one end of the injection needle body near the needle tip (51) and is used to obtain the liquid output volume of the injection needle body. When the pressure increases from zero, the processing drive unit drives the valve body (2) to open; when the liquid output exceeds the specified pause flow threshold, the processing drive unit drives the valve body (2) to close.

8. The contact injection needle structure according to claim 7, characterized in that, When the liquid output exceeds the specified flow stop threshold, the processing drive unit drives the valve body (2) to close.

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