CN108575807B - An indwelling needle for collecting ruminal gas - Google Patents

Abstract

The invention discloses an indwelling needle for collecting ruminal gas, which includes a needle body. The upper end of the needle body is provided with a needle tip, and a needle column is connected below the needle tip. It also includes an airway tube, and the airway tube The needle body is sleeved on the outer body of the needle. The outer periphery of the needle body is provided with a pawl. The pawl extends obliquely upward. The pawl passes through the inner wall of the air conduit and is inserted into the air conduit so that the air conduit and the needle are connected. The body remains relatively fixed. An indwelling needle for collecting rumen gas is provided. The indwelling needle can puncture into the rumen, and can leave the airway tube on the rumen after puncture, so that the gas in the rumen can be exported to the rumen through the airway tube for collection and further processing. The present invention relates to the field of feeding, in particular to an indwelling needle used to collect gas produced in the rumen.

Description

An indwelling needle for collecting rumen gas

Technical field

The present invention relates to the field of feeding, in particular to an indwelling needle used to collect gas produced in the rumen.

Background technique

The stomach of cattle is composed of 4 gastric chambers, namely rumen, honeycomb stomach, double omasum and abomasum. The rumen is the largest, accounting for 80% of the total volume of the four stomachs. A large number of microorganisms grow and reproduce in it, and a large part of the feed is digested here. The rumen is the first stomach of ruminants. The rumen is the natural fermenter with the strongest ability to degrade fiber substances known so far. Due to the presence of methane bacteria in the rumen, the rumen will produce methane after decomposing the crude fiber component in the feed. A cow with an annual output of 8,000 to 10,000L of milk will produce methane every day. Approximately 500 to 700L of methane is produced. On average, a cow produces about 700L of methane every day.

Methane gas produced in the rumen is excreted through the cow's mouth, nose and anus. About 20% of the energy in the feed is converted into gas and is excreted out of the cow's body, and only about 80% of the energy is supplied to the cow's body. The energy utilization rate of the feed is low, and the methane produced in the rumen will pollute the surrounding environment. Few cattle farms of a certain scale have been ordered to close by the environmental protection department for this reason.

In response to the above problems, the current solutions are mostly to improve through biological methods, such as improving feed formula or adding prebiotics, probiotics, synbiotics and other methods to the feed to improve feed utilization and reduce the production of rumen gas. and emissions, but the effect is little and the feeding cost becomes high.

The gas in the rumen contains a large amount of methane. Methane is natural gas and can be used as fuel. However, few people have thought of using physical methods to convert blockage into clearing and collect the gas produced in the rumen for further utilization.

Contents of the invention

The technical problem to be solved by the present invention is to provide an indwelling needle for collecting rumen gas.

The solution of the present invention to solve the technical problem is: an indwelling needle for collecting ruminal gas, which includes a needle body, the upper end of the needle body is provided with a needle tip, and a needle column is connected below the needle tip, and also includes a guide The trachea, the air guide tube is sleeved outside the needle body, the outer periphery of the needle body is provided with a detent, the detent protrudes obliquely upward, and the detent is inserted into the guide tube through the inner wall of the air guide tube. trachea, so that the airway tube and the needle body remain relatively fixed.

As a further improvement of the above technical solution, the air guide tube is made of elastic material. The air guide tube is provided with a fixed part, an elastic part and a connecting part from top to bottom. The fixed part and the connecting part pass through the elastic part. connected together; the elastic part expands outward in a free state, and the pawl penetrates the inner wall of the fixed part and is inserted into the air guide tube, so that the elastic part retracts and the horizontal size of the elastic part becomes smaller.

As a further improvement of the above technical solution, the number of said pawls is several, and the said needle column is also provided with pawls.

As a further improvement of the above technical solution, it also includes a fixed frame, a ejector rod, and a ejector sleeve. The fixed frame is fixed at the lower end of the air guide pipe. The fixed frame is in the shape of a truncated cone. The ejector rod is provided with an outer side of the fixed frame. , the ejector rod is threadedly connected to the fixed frame, and the ejector sleeve is fixed on the upper side of the fixed frame.

As a further improvement of the above technical solution, the fixed frame is also provided with an annular sealing bone, and the sealing bone tightly abuts the inner wall of the connecting part.

As a further improvement of the above technical solution, the upper end of the fixed frame is further provided with a guide portion, the upper side of the guide portion is larger and the lower side is smaller.

As a further improvement of the above technical solution, the detent includes a tip and an extending arm connected together, the tip is located at the upper end of the detent, the extending arm is connected to the needle body, and the extending arm The thickness of the side of the outlet arm close to the needle body is smaller.

The beneficial effects of the present invention are: providing an indwelling needle for collecting rumen gas, which can be punctured into the rumen, and can leave the airway tube on the rumen after puncture, so that the gas in the rumen can be exported through the airway tube. rumen, collected for further processing.

The present invention relates to the field of feeding, in particular to an indwelling needle used to collect gas produced in the rumen.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present invention more clearly, the drawings needed to be used in the description of the embodiments will be briefly described below. Obviously, the described drawings are only some of the embodiments of the present invention, not all embodiments. Those skilled in the art can also obtain other design solutions and drawings based on these drawings without exerting creative efforts.

Figure 1 is a front cross-sectional view of an embodiment of the present invention;

Figure 2 is a schematic structural diagram of the needle inserted into the rumen and taken out according to the embodiment of the present invention.

Detailed ways

The concept, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and drawings to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without exerting creative efforts are all protection scope of the present invention. In addition, all the connections/connection relationships mentioned in the article do not only refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation conditions. Various technical features in the invention can be combined interactively without conflicting with each other.

The embodiment is as follows, with reference to Figures 1 to 2, an indwelling needle for collecting ruminal gas includes a needle body 2. The upper end of the needle body 2 is provided with a needle tip, and a needle column is connected below the needle tip. It includes an air guide tube 1. The air guide tube 1 is sleeved outside the needle body 2. A pawl 21 is provided on the outer circumference of the needle body 2. The pawl 21 protrudes obliquely upward. The claw 21 penetrates the inner wall of the air guide tube 1 and is inserted into the air guide tube 1 so that the air guide tube 1 and the needle body 2 remain relatively fixed.

When in use, the needle is inserted into the rumen, and the airway and the rumen are kept relatively fixed, so that when the needle is inserted, the airway is also inserted into the rumen. The pawl provided on the needle can ensure that the needle is inserted into the rumen. It is difficult for the needle body to slip between the needle body and the air guide tube so that the air guide tube cannot be inserted, and the pawl is arranged obliquely upward so that the needle body can be easily pulled out without causing damage to the air guide tube. When installing the indwelling needle, you only need to insert the needle downward from the upper side of the air tube. After the height is adjusted in place, grab the catheter and push the needle upward. The pawl is inserted into the air tube to complete the installation.

As a further preferred embodiment, the air guide tube 1 is made of elastic material. The air guide tube 1 is provided with a fixed part 12, an elastic part 11 and a connecting part from top to bottom. The fixed part 12 is connected to The two parts are connected together through the elastic part 11; the elastic part 11 expands outwards in a free state, and the pawl 21 is inserted into the air guide tube 1 through the inner wall of the fixed part 12, so that the elastic part 11 retracts, The elastic portion 11 has a smaller horizontal dimension. Thereby, the fixed part and the needle tip are connected together through the pawl, and the taper at the needle tip is used, and the lateral size of the elastic part is reduced, and the airway tube can more easily penetrate into the hole punctured by the needle tip. After the airway tube is extended into the rumen and the needle body is removed, the restraint of the elastic part by the fixed part disappears. Since the elastic part returns to a free state, the elastic part expands outward and gets stuck on the inner wall of the rumen, which can prevent the airway tube from slipping.

As a further preferred embodiment, the number of the pawls 21 is several, and the pawls 21 are also provided on the needle column. Increasing the number of pawls can make the connection between the air tube and the needle body more stable, the thrust force between the air tube and the needle body is more evenly distributed, and the pawls are less likely to break.

As a further preferred embodiment, it also includes a fixing frame 4, a push rod 5, and a push sleeve 3. The fixing bracket 4 is fixed at the lower end of the air guide tube 1. The fixing bracket 4 is in the shape of a truncated cone, and the push rod is 5 is provided with a fixing frame 4, the push rod 5 is threadedly connected to the fixing frame 4, and the top sleeve 3 is fixed on the upper side of the fixing frame 4. When the airway tube is successfully inserted into the rumen of the cow, the airway tube is easily displaced due to the cow's own movements, and touching the rumen wall causes discomfort to the cow. For this reason, the airway tube needs to be relatively fixed. By setting the ejector rod and the fixed frame, the air guide pipe is fixed on the fixed frame, and the threaded connection between the ejector rod and the fixed frame is used, and the ejector rod is adjusted by rotating the ejector rod until the ejector sleeve fixed on the upper side of the ejector rod can be pressed against The outer abdominal wall of the cow can fix the airway. Preferably, the top sleeve is made of flexible material, which can enable the top sleeve to fit a larger area of the unpredictable abdominal wall shape, thereby reducing the pressure at the contact point.

As a further preferred embodiment, the fixing frame 4 is also provided with an annular sealing bone 41, and the sealing bone 41 tightly abuts the inner wall of the connecting portion. Therefore, by providing the sealing bone, the sealing connection between the fixing frame and the air guide tube can be made more reliable, and the gas can be less likely to leak.

As a further preferred embodiment, the upper end of the fixing frame 4 is further provided with a guide portion 42, the upper side of the guide portion 42 is larger and the lower side is smaller. When the needle body protrudes downwards, since the diameter of the passage of the needle body in the fixing frame is smaller than the diameter of the air guide tube, when the needle body protrudes downwards, the pawl must be folded upward toward the needle column to successfully protrude. By providing this guide part, when the needle body needs to be pulled downward, the cross section at the guide part can provide a deformation transition for the detent on the needle body, so that less force is required during the pulling process and the detent is easier to deform. Pull out; furthermore, even when the pawl breaks during the pulling out deformation process, the broken pawl can more easily come out through the guide part.

As a further preferred embodiment, the detent 21 includes a tip and an extending arm connected together. The tip is provided at the upper end of the detent 21. The extending arm is connected to the needle body 2. The thickness of the side of the outstretched arm close to the needle body 2 is smaller. As a result, the thickness of the pawl gradually increases from the point where the extended arm meets the needle body toward the tip side. When the pawl is inserted, due to the larger thickness at the tip, its strength during insertion is ensured and it is not prone to bending. ; And when it comes out, because the thickness of the connecting point between the extending arm and the needle body is smaller, deformation occurs more easily here, making it easier for the pawl to lean toward the side where the needle column is located.

The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the embodiments. Those skilled in the art can also make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims (5)

1. The utility model provides a keep somewhere needle for collecting rumen gas, includes needle body (2), the upper end of needle body (2) be equipped with the needle point, needle point below be connected with the spike, its characterized in that: the novel medical needle comprises a needle body (2), and is characterized by further comprising an air duct (1), wherein the air duct (1) is sleeved outside the needle body (2), a pawl (21) is arranged on the periphery of the needle body (2), the pawl (21) stretches out obliquely upwards, the pawl (21) penetrates through the inner wall of the air duct (1) and is inserted into the air duct (1) so that the air duct (1) and the needle body (2) are relatively fixed, the air duct (1) is made of an elastic material, a fixing part (12), an elastic part (11) and a connecting part are arranged on the air duct (1) from top to bottom, and the fixing part (12) and the connecting part are connected together through the elastic part (11); the elastic part (11) is unfolded outwards in a free state, the pawl (21) penetrates through the inner wall of the fixing part (12) and is inserted into the air duct (1), so that the elastic part (11) is retracted, and the horizontal size of the elastic part (11) is smaller; still include mount (4), ejector pin (5), top cover (3), mount (4) fix the lower extreme at air duct (1), mount (4) be round platform form, ejector pin (5) be equipped with outside mount (4), ejector pin (5) and mount (4) threaded connection, top cover (3) fix the upside at mount (4).

2. The indwelling needle for collecting rumen gas according to claim 1, wherein: the number of the pawls (21) is a plurality, and the needle column is also provided with the pawls (21).

3. The indwelling needle for collecting rumen gas according to claim 1, wherein: the fixing frame (4) is also provided with an annular sealing bone (41), and the sealing bone (41) is tightly abutted against the inner wall of the connecting part.

4. The indwelling needle for collecting rumen gas according to claim 1, wherein: the upper end of the fixing frame (4) is also provided with a guide part (42), and the upper side of the guide part (42) is large and the lower side is small.

5. An indwelling needle for collecting rumen gas according to any one of claims 1 to 4, which is characterised in that: the pawl (21) comprises a tip and an extension arm which are connected together, the tip is arranged at the upper end of the pawl (21), the extension arm is connected to the needle body (2), and the thickness of one side of the extension arm, which is close to the needle body (2), is smaller.