Distribution structure and semen deposition gun

Abstract

The utility model relates to the technical field of livestock and poultry artificial insemination, and discloses a distribution structure and a semen deposition gun, the distribution structure adopts a pump structure and is provided with a pump body and a piston rod, the piston rod is matched in a pump cavity of the pump body to realize automatic suction or pumping of semen with a preset volume, manual suction by an operator is not needed, and the labor intensity of the operator is reduced. Automatic semen transfer in the artificial insemination process is achieved, and the semen transfer efficiency is effectively improved.

Description

Technical Field

[0001] This application relates to the field of artificial insemination technology for livestock and poultry, and in particular to a delivery structure and an insemination gun. Background Technology

[0002] In poultry and livestock farming, artificial insemination can improve reproductive efficiency and genetic quality. Artificial insemination procedures (e.g., collection, dilution, preservation, transfer, and insemination) typically rely on manual operation. Operators usually use pipettes for semen transfer, but pipettes are prone to wear and tear during use, and the low efficiency of manual semen transfer limits the cost and efficiency of large-scale farming. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art. Therefore, the main objective of this application is to propose a delivery structure and an insemination gun, designed to solve the problem of low efficiency in semen transfer operations during artificial insemination of poultry and livestock.

[0004] To achieve the above objectives, this application proposes a delivery structure for use with insemination guns for poultry or livestock, the delivery structure comprising:

[0005] A pump body having a pump chamber for containing semen and an outlet communicating with the pump chamber;

[0006] A piston rod, the first end of which slides within the pump chamber to draw or pump a preset volume of semen through the outlet of the pump chamber;

[0007] An adjusting component, which is mounted on the pump body or the piston rod, is used to adjust the length of the sliding stroke of the piston rod in the pump chamber.

[0008] Optionally, the piston rod has a second end extending outside the pump body;

[0009] The adjusting element includes:

[0010] A first limiting block is connected to the second end and its relative distance to the pump body is adjustable; the first limiting block approaches and abuts against the pump body under the action of the piston rod to restrict the piston rod from continuing to extend into the pump body.

[0011] Optionally, the piston rod has a second end extending outside the pump body;

[0012] The adjusting element includes:

[0013] The second limiting block is connected to the pump body and its relative distance to the end of the second end of the piston rod is adjustable; when the second end of the piston rod moves in a direction away from the pump body, the end of the second end of the piston rod approaches and abuts against the second limiting block.

[0014] Optionally, the piston rod has a second end extending outside the pump body;

[0015] The adjusting element includes:

[0016] The third limiting block is connected to the pump body and its relative distance to the end of the second end of the piston rod is adjustable; when the second end of the piston rod moves in the direction of extending into the pump body, the end of the second end of the piston rod approaches and abuts against the third limiting block.

[0017] Optionally, the delivery structure further includes:

[0018] An indicator, mounted on the pump body or the adjusting member, is used to indicate the magnitude of the sliding stroke of the piston rod.

[0019] Optionally, the indicator includes:

[0020] A base block, which is mounted on the pump body;

[0021] A scale is mounted on the adjusting member; the scale is provided with graduations for marking a preset capacity, and the scale is used to indicate the graduations.

[0022] Optionally, the delivery structure further includes:

[0023] An elastic reset element; the second end of the piston rod extends out of the pump body and is connected to the elastic reset element; the piston rod moves along the direction extending out of the pump body under the elastic force of the elastic reset element.

[0024] Optionally, the delivery structure further includes:

[0025] A three-way connector is installed on the pump body; the three-way connector has a first port, a second port and a third port that are interconnected, and the first port is connected to the outlet of the pump cavity.

[0026] Optionally, the delivery structure further includes:

[0027] A first one-way valve is installed on the three-way connector and is connected to the second port; the first one-way valve is used to allow semen to be unidirectionally input into the pump chamber; and / or,

[0028] The second one-way valve is installed on the three-way connector and is connected to the third port; the second one-way valve is used to allow the semen in the pump chamber to be discharged in one direction.

[0029] Another technical solution proposed in this application is as follows: an insemination gun, including the delivery structure described above.

[0030] This application provides a delivery structure and an insemination gun. The delivery structure adopts a pump structure, which has a pump body and a piston rod. The piston rod cooperates in the pump chamber of the pump body to realize automatic aspiration or pumping of a preset volume of semen, eliminating the need for manual aspiration by the operator. This automates the semen transfer process in artificial insemination and effectively improves the semen transfer efficiency. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 A three-dimensional structural diagram of the insemination gun provided in this application;

[0033] Figure 2 A three-dimensional structural diagram of the insemination gun provided in this application from another perspective;

[0034] Figure 3 A three-dimensional exploded structural diagram of the insemination gun provided in this application;

[0035] Figure 4 A three-dimensional schematic diagram showing the cross-section of the insemination gun provided in this application;

[0036] Figure 5 An exploded three-dimensional structural diagram of the delivery structure in the insemination gun provided in this application;

[0037] Figure 6 A three-dimensional schematic diagram showing the cross-sectional view of the delivery structure in the insemination gun provided in this application;

[0038] Figure 7 A three-dimensional schematic diagram showing the deformed cross-section of the delivery structure in the insemination gun provided in this application;

[0039] Figure 8 A three-dimensional schematic diagram showing the deformed cross-section of the delivery structure in the insemination gun provided in this application.

[0040] Explanation of icon numbers:

[0041] 10. Distribution structure;

[0042] 11. Pump body; 111. Pump chamber; 112. Outlet;

[0043] 12. Piston rod; 121. First end; 122. Second end;

[0044] 13. Elastic reset component;

[0045] 14. Adjusting component; 141. First limiting block; 142. Second limiting block; 143. Third limiting block;

[0046] 15. Indicator; 151. Base block; 152. Scale;

[0047] 16. T-connector; 161. First port; 162. Second port; 163. Third port;

[0048] 17. First check valve;

[0049] 20. Insemination gun; 21. Storage structure; 22. Injection structure; 221. Dispensing section; 23. Cleaning structure; 24. Frame. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0051] This application addresses the problem of low efficiency in semen transfer during artificial insemination of poultry and livestock by providing a delivery structure and an insemination gun. The delivery structure employs a pump design, comprising a pump body and a piston rod. The piston rod, working within the pump chamber of the pump body, automatically aspirates or pumps a preset volume of semen, eliminating the need for manual aspiration by the operator. This automates semen transfer during artificial insemination, effectively improving semen transfer efficiency. See the following embodiments for details.

[0052] Please refer to the following: Figures 1 to 4The first embodiment of this application provides an insemination gun 20 for insemination of poultry or livestock. The insemination gun 20 includes a delivery structure 10, which can deliver a preset volume of semen for insemination. The delivery structure 10 employs a pump structure, comprising a pump body 11 and a piston rod 12. The piston rod 12 cooperates within the pump chamber 111 of the pump body 11 to automatically aspirate and pump the preset volume of semen, eliminating the need for manual aspiration and automating semen transfer during artificial insemination, effectively improving semen transfer efficiency. Furthermore, the mechanical pump structure offers greater durability and extended service life compared to existing pipettes, contributing to cost reduction. The preset volume refers to the amount of semen to be inseminated in each artificial insemination of poultry or livestock. For example, for chickens, the optimal insemination volume is 0.02ml-0.04ml, i.e., a preset volume of 0.02ml-0.04ml, to ensure an effective fertilization rate.

[0053] Furthermore, to achieve a one-step completion of semen storage, delivery, and injection into the insemination site during artificial insemination, thereby improving operator convenience and efficiency, the insemination gun 20 is equipped with a semen storage structure 21 and an injection structure 22 for injecting semen into the insemination site. These structures work in conjunction with the semen delivery structure 10 to automate the storage, transfer, and injection of semen into the insemination site of poultry or livestock. This improves the consistency of artificial insemination operations, effectively increases efficiency, meets the high-efficiency insemination needs of large-scale farms, and helps increase the success rate of artificial insemination. The insemination gun 20 also includes a frame 24. The frame 24, as the supporting and fixing structure in the insemination gun 20, serves to install and fix components such as the storage structure 21 and the delivery structure 10, ensuring the normal operation of functions such as semen storage, delivery, and insemination. The frame 24 can be composed of a base and a shell to install and fix components such as the delivery structure 10 and the injection structure 22, and to provide protection. It can also be other structures. This application does not limit the shape, size, and structure of the frame 24, as long as it can ensure the normal operation of the delivery structure 10 and the injection structure 22. The storage structure 21 has a liquid storage chamber that maintains a preset storage temperature, which can store semen at the preset storage temperature to extend the semen preservation time and improve the success rate of artificial insemination. The preset storage temperature is determined according to the target insemination. Taking poultry as an example: for artificial insemination of chickens, the preset storage temperature for semen preservation is set to 35℃-40℃, which is close to the chicken's body temperature, to ensure sperm motility and fertilization capacity. The delivery structure 10 is connected to the storage structure 21 and the injection structure 22 respectively. It is used to deliver semen stored at a preset storage temperature to the injection structure 22 in a preset volume. The preset volume is the amount of semen to be inseminated in each artificial insemination of poultry and livestock. Taking poultry as an example, the amount of semen to be inseminated in chickens should be 0.02ml-0.04ml, that is, the preset volume is 0.02ml-0.04ml, so as to ensure an effective fertilization rate. The insemination gun 20 injects a preset volume of semen into the insemination site of poultry or livestock through the outlet section 221 of the injection structure 22. The outlet section 221 of the injection structure 22 is movably and retractably configured relative to the frame 24. When the insemination gun 20 inseminates the poultry or livestock, the outlet section 221 is inserted into the insemination site in a movably and retractably manner and injects the preset volume of semen, ensuring accurate and precise injection of the required volume of semen into the insemination site, thus helping to improve the insemination success rate. To maintain the cleanliness and hygiene of the insemination process and improve the insemination success rate, the insemination gun 20 also has a cleaning structure 23. At least a portion of the cleaning structure 23 is fitted onto the outlet section 221 and is used to clean the outlet section 221. When artificially inseminating multiple poultry and livestock, the outlet section 221 will come into contact with the insemination sites of different individuals, making it prone to contamination with bacteria, impurities, etc.The cleaning structure 23 can clean the discharge section 221 in a timely manner to prevent cross-infection and ensure the hygiene of each insemination operation. For example, in a large-scale chicken farm, when artificially inseminating multiple chickens, the cleaning structure 23 can clean the discharge section 221 before and after each insemination to ensure that the semen is not contaminated and improve the insemination success rate.

[0054] Please refer to the following: Figures 3 to 5 In some embodiments, the delivery structure 10 includes a pump body 11 and a piston rod 12. The pump body 11 has a pump chamber 111 specifically for containing semen and an outlet 112 for semen to enter and exit the pump chamber 111, which helps the delivery structure 10 to accurately control the amount of semen output. The first end 121 of the piston rod 12 is slidably configured to cooperate with the pump chamber 111, and the second end 122 of the piston rod 12 extends out of the pump chamber 111 of the pump body 11. When the piston rod 12 slides away from the outlet 112 of the pump chamber 111, that is, when the second end 122 moves away from the pump body 11, the volume of the pump chamber 111 increases and the pressure inside the chamber decreases. Under the action of external atmospheric pressure, semen is drawn into the pump chamber 111 from the outlet 112. When the second end 122 of the piston rod 12 moves toward the outlet 112 of the pump chamber 111, the volume of the pump chamber 111 decreases and the pressure inside the chamber increases, and the semen is pumped out. The change in volume of pump chamber 111 is the preset capacity for each aspiration and pumping of semen by delivery structure 10; while the sliding stroke of piston rod 12 in pump chamber 111 determines the change in volume of pump chamber 111. The driving force for piston rod 12 to move in pump chamber 111 can be realized by an external power source connected to pump body 11, such as a hydraulic source or a pneumatic source, using hydraulic or pneumatic drive to drive piston rod 12 to slide in pump chamber 111.

[0055] To achieve precise adjustment of the semen volume pumped each time, the delivery structure 10 is also equipped with an adjusting component 14. The adjusting component 14 is installed on the pump body 11 or the piston rod 12. By adjusting the adjusting component 14, the length of the sliding stroke of the piston rod 12 in the pump chamber 111 is changed, thereby achieving precise control of the pumped semen volume. Using the adjusting component 14 allows the insemination gun 20 to adjust the preset volume of output semen to adapt to the insemination volume requirements of different breeds of poultry and livestock, improving the versatility of the insemination gun 20. It also meets the differentiated insemination needs of different individuals and at different stages of insemination. For example, in artificial insemination of chickens, factors such as the breed characteristics, egg-laying cycle, and health status of the hen need to be comprehensively considered. The sliding stroke of the piston rod 12 is precisely adjusted to the appropriate value using the adjusting component 14 to ensure that a precise preset volume of semen is delivered to the injection component each time, meeting the differentiated insemination needs of different hens and at different insemination stages, significantly improving the accuracy and success rate of artificial insemination operations.

[0056] The delivery structure 10 also includes an elastic reset member 13. The first end 121 of the piston rod 12 slides within the pump chamber 111, while the second end 122 extends out of the pump body 11 and connects to the elastic reset member 13. When the piston rod 12 slides towards the outlet 112 of the pump chamber 111 (i.e., the liquid outlet direction of the pump body 11) under the drive of an external power source (e.g., a hydraulic or pneumatic source) of the delivery structure 10, to pump semen, the elastic reset member 13 is compressed. When the external driving force is removed, the piston rod 12 moves along the direction extending out of the pump body 11 under the elastic force of the elastic reset member 13, achieving automatic reset and preparing for the next semen aspiration process. Using the elastic reset member 13 in conjunction with the piston rod 12 to achieve automatic reset improves the continuity of the insemination operation, reduces manual operation steps, increases work efficiency, and ensures the stability of each semen aspiration, thus guaranteeing the insemination effect. The elastic reset element 13 can be a compression spring or a compression leaf spring. The compression spring is sleeved on the end of the piston rod 12 that extends out of the pump body 11, and the two ends of the compression leaf spring or compression spring abut against the pump body 11 and the end of the piston rod 12 that extends out of the pump body 11, respectively.

[0057] To provide operators with a reference when adjusting the preset capacity, the delivery structure 10 is also equipped with an indicator 15. The indicator 15 is installed on the delivery structure 10 and can clearly indicate the sliding stroke of the piston rod 12, that is, clearly indicate the preset capacity of the semen pumped by the delivery structure 10. This ensures that the operator can accurately adjust the amount of semen pumped by the delivery structure 10 to meet the preset capacity requirements through the adjusting component 14, thereby improving the controllability and accuracy of the artificial insemination operation.

[0058] Please refer to the following: Figures 4 to 8In some embodiments, the adjusting member 14 has various structural forms. The first type involves a first limiting block 141. The first limiting block 141 connects to the second end 122 of the piston rod 12 extending outside the pump body 11, and its relative distance to the pump body 11 is adjustable. When the second end 122 of the piston rod 12 moves closer to the pump body 11 during the pumping of semen, the first limiting block 141, driven by the piston rod 12, approaches and abuts against the pump body 11, thereby restricting the piston rod 12 from further extending into the pump body 11. This adjusts the sliding stroke of the piston rod 12, thereby adjusting the volume change of the pump chamber 111, i.e., adjusting the preset capacity. The first limiting block 141 and the piston rod 12 can be threaded together. By screwing the first limiting block 141 along the piston rod 12, the relative distance between the first limiting block 141 and the pump body 11 can be adjusted, thereby achieving adjustment of the sliding stroke of the piston rod 12. The second type involves a second limiting block 142. The second limiting block 142 is connected to the pump body 11, and the relative distance between the second limiting block 142 and the end of the second end 122 is adjustable. When the second end 122 of the piston rod 12 moves in the direction extending into the pump body 11, the end of the second end 122 approaches and abuts against the second limiting block 142, thereby limiting the stroke length of the piston rod 12 and thus limiting the volume change of the pump chamber 111. That is, the preset capacity can be adjusted by adjusting the position of the second limiting block 142. The third type is to set a third limiting block 143. The third limiting block 143 is connected to the pump body 11, and the relative distance between the third limiting block 143 and the end of the second end 122 of the piston rod 12 extending out of the pump chamber 111 is adjustable. When the second end 122 of the piston rod 12 moves in the direction of extending into the pump body 11, the end of the second end 122 approaches and abuts against the third limiting block 143. The third limiting block 143 restricts the stroke length of the piston rod 12, thereby limiting the volume change of the pump chamber 111. The preset capacity can be adjusted by adjusting the position of the third limiting block 143.

[0059] Specifically, the indicator 15 includes a base block 151 and a scale 152. The base block 151 serves as a reference and is mounted on the pump body 11; the scale 152 is mounted on the first limit block 141, the second limit block 142, or the third limit block 143, and the scale 152 has graduations for marking the preset capacity; the scale 152 works in conjunction with the base block 151, and by observing the corresponding graduations on the scale 152 indicated by the base block 151, the operator can intuitively understand the semen pumping volume corresponding to the current sliding stroke of the piston rod 12, that is, determine the current preset capacity, providing an intuitive reference for the operator to adjust the preset capacity and improving convenience. Taking artificial insemination of chickens as an example, when using an insemination gun 20 equipped with a first limit block 141 and a corresponding scale 152, the operator can clearly see the scale indicated by the scale 152 and judge whether the current pumped semen volume meets the preset capacity requirements for artificial insemination of chickens, such as 0.2ml-0.4ml, so as to adjust the adjusting component 14 in time to ensure the accuracy of the insemination volume.

[0060] Please continue to refer to the following: Figure 4 and Figure 5 In some embodiments, the delivery structure 10 is provided with a three-way connector 16, which is mounted on the pump body 11 and communicates with the pump chamber 111, serving as a connection and diversion function. The three-way connector 16 has a first port 161, a second port 162, and a third port 163 that are interconnected, wherein the first port 161 is connected to the outlet 112 of the pump chamber 111 of the pump body 11, so that the pressure generated by the pump chamber 111 can be effectively transmitted to the three-way connector 16 through the outlet 112 of the pump chamber 111, providing a power basis for the aspiration and pumping of semen. When the second end 122 of the piston rod 12 moves closer to the pump body 11, the volume of the pump chamber 111 decreases, and the pressure inside the pump chamber 111 increases. Semen in the pump chamber 111 enters the three-way connector 16 from the outlet 112 through the first port 161, and is discharged through the second port 162 or the third port 163, thus achieving the pumping effect on the semen. When the second end 122 of the piston rod 12 moves away from the pump body 11, the volume of the pump chamber 111 increases, and the pressure inside the pump chamber 111 decreases, creating a negative pressure in the pump chamber 111. This causes semen to enter the three-way connector 16 from the third port 163 or the second port 162, and then enters the pump chamber 111 through the first port 161, thus achieving the suction effect on the semen. At this time, the three-way connector 16 acts as a semen transfer structure, ensuring that a single outlet 112 of the pump chamber 111 can achieve both suction and pumping of semen.

[0061] Please continue reading. Figure 5 In some embodiments, to further ensure unidirectional flow of semen after passing through the delivery structure 10 and improve the reliability of the insemination process and semen quality, the delivery structure 10 is also equipped with a first one-way valve 17 and a second one-way valve (not shown). The first one-way valve 17 is installed on the three-way connector 16 and is connected to the second port 162. During the semen collection stage, the externally collected semen needs to enter the pump chamber 111 for subsequent delivery; at this time, when the external semen flows towards the second port 162 under the action of a certain pressure difference, the first one-way valve 17 opens, allowing semen to be input into the pump chamber 111 in only one direction through the first one-way valve 17; when the second end 122 of the piston rod 12 moves in the direction close to the pump body 11, the volume of the pump chamber 111 decreases, the internal pressure of the pump chamber 111 increases, and the pressure of the pump chamber 111 is higher than the pressure at the external semen collection end, the first one-way valve 17 closes, effectively preventing the semen in the pump chamber 111 from flowing back to the external collection or storage device, ensuring the purity of the semen and the correctness of the delivery direction.

[0062] The second one-way valve is installed on the three-way connector 16 and connects to the third port 163. During the insemination stage, when the second end 122 of the piston rod 12 moves closer to the pump body 11, the volume of the pump chamber 111 decreases, the internal pressure of the pump chamber 111 increases, and the semen in the pump chamber 111 flows to the third port 163. At this time, the second one-way valve opens, allowing the semen in the pump chamber 111 to be discharged unidirectionally and transported to the injection structure 22 through subsequent pipelines, thereby completing the insemination operation to the insemination site of poultry or livestock. During the non-insemination stage, or when the pressure in the pump chamber 111 is unstable and there is a backflow tendency, the second one-way valve closes, preventing the semen from flowing back into the pump chamber 111, ensuring that the semen flows along the predetermined path and direction, improving the stability and accuracy of the insemination process, and helping to increase the success rate of artificial insemination. The cooperative structural design of the first one-way valve 17, the second one-way valve, and the three-way connector 16 helps to improve the accuracy of the insemination volume and avoid waste.

[0063] This application provides a delivery structure and an insemination gun. The delivery structure adopts a pump structure, which has a pump body and a piston rod. The piston rod cooperates in the pump chamber of the pump body to realize automatic aspiration or pumping of a preset volume of semen, eliminating the need for manual aspiration by the operator. This automates the semen transfer process in artificial insemination and effectively improves the semen transfer efficiency.

[0064] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0065] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this application, unless otherwise stated, "multiple" means two or more. Additionally, if "and / or," "and / or," or "and / or" appears throughout the text, it means three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously.

[0066] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0067] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0068] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural transformations made based on the content of the specification and drawings of this application under the concept of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A delivery structure for use in insemination guns for poultry or livestock, characterized in that, The delivery structure includes: A pump body having a pump chamber for containing semen and an outlet communicating with the pump chamber; A piston rod, the first end of which slides within the pump chamber to draw or pump a preset volume of semen through the outlet of the pump chamber; An adjusting component, which is mounted on the pump body or the piston rod, is used to adjust the length of the sliding stroke of the piston rod in the pump chamber.

2. The delivery structure as described in claim 1, characterized in that, The piston rod has a second end that extends out of the pump body; The adjusting element includes: A first limiting block is connected to the second end and its relative distance to the pump body is adjustable; the first limiting block approaches and abuts against the pump body under the action of the piston rod to restrict the piston rod from continuing to extend into the pump body.

3. The delivery structure as described in claim 1, characterized in that, The piston rod has a second end that extends out of the pump body; The adjusting element includes: The second limiting block is connected to the pump body and its relative distance to the end of the second end of the piston rod is adjustable; when the second end of the piston rod moves in a direction away from the pump body, the end of the second end of the piston rod approaches and abuts against the second limiting block.

4. The delivery structure as described in claim 1, characterized in that, The piston rod has a second end that extends out of the pump body; The adjusting element includes: The third limiting block is connected to the pump body and its relative distance to the end of the second end of the piston rod is adjustable; when the second end of the piston rod moves in the direction of extending into the pump body, the end of the second end of the piston rod approaches and abuts against the third limiting block.

5. The delivery structure as described in any one of claims 2-4, characterized in that, The delivery structure also includes: An indicator, mounted on the pump body or the adjusting member, is used to indicate the magnitude of the sliding stroke of the piston rod.

6. The delivery structure as described in claim 5, characterized in that, The indicator includes: A base block, which is mounted on the pump body; A scale is mounted on the adjusting member; the scale is provided with graduations for marking a preset capacity, and the scale is used to indicate the graduations.

7. The delivery structure as described in claim 1, characterized in that, The delivery structure also includes: An elastic reset element; the second end of the piston rod extends out of the pump body and is connected to the elastic reset element; the piston rod moves along the direction extending out of the pump body under the elastic force of the elastic reset element.

8. The delivery structure as described in claim 1, characterized in that, The delivery structure also includes: A three-way connector is installed on the pump body; the three-way connector has a first port, a second port and a third port that are interconnected, and the first port is connected to the outlet of the pump cavity.

9. The delivery structure as described in claim 8, characterized in that, The delivery structure also includes: A first one-way valve is installed on the three-way connector and is connected to the second port; the first one-way valve is used to allow semen to be unidirectionally input into the pump chamber; and / or, The second one-way valve is installed on the three-way connector and is connected to the third port; the second one-way valve is used to allow the semen in the pump chamber to be discharged in one direction.

10. An insemination gun, characterized in that, Includes the delivery structure as described in any one of claims 1-9.

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