258results about How to "Achieving a sealed connection" patented technology

A seal structure of an electric kettle comprises a body with a handle and a bottom cover of the body. A heating element is disposed in the body. The body is provided with a body opening corresponding to the heating element. A seal part is disposed at the connection of the body opening with the heating element. The seal part or the body is provided with a snap ring outside. The snap ring for fixing the heating element is hermetically connected with the body, or the seal part or the body is provided with a retractable strip, or a metal tying wire for fixing the heating element is hermetically connected with the body. The seal part is provided with a groove part with an upward opening, or the inner wall of a silicone seal ring and the outer wall of the heating element form a groove part with an upward opening, or a contact face of the seal part is in extrusion-deforming fit with the cross section of the body opening. The seal part is added to the heating element and provided with the snap ring, the retractable strip or the metal tying wire outside, and accordingly the heating element is hermetically connected with the body, poor tightness, seepage and the like are effectively prevented, and product quality is improved.

The invention discloses a novel cast iron plate-type air preheater. The air preheater provided by the invention is mainly characterized in that a cast iron heat transfer plate comprises a center plate, an upper fin, a lower fin, a connecting plate, four quadrangular prisms, two upper shift sideboards and two sinking sideboards, the upper shift sideboards are connected with the sinking sideboards by virtue of the quadrangular prisms, the vertical direction and horizontal direction of each quadrangular prism are respectively provided with a drawbar hole, and the two drawbar holes are not communicated; paired drawbar holes at the horizontal direction of the four quadrangular prisms are coaxial, and multichip cast iron heat transfer plates are laminated up and down; and the laminated positionof the two adjacent cast iron heat transfer plates is horizontally rotated 90 degrees, and multiple drawbars are connected with the cast iron heat transfer plates into a whole in series by virtue of the drawbar holes of the multichip cast iron heat-transferring plate. The air preheater provided by the invention is suitable for being used in flue gas waste heat recovery systems of various industrial furnaces and boilers, thereby ensuring the leakage rate of the air preheater to be less than 1%.

The invention discloses a shell component. The shell component comprises a shell, a middle frame and a seal assembly, wherein the middle frame is housed inside the shell; the middle frame divides theinterior space of the shell into a first space and a second space; a joint seam is formed between the middle frame and the shell; the joint seam is communicated with the first space and the second space; the seal assembly comprises a first sealing element and a second sealing element which are sealed at the joint seam in a stacking way; and the first sealing element and the second sealing elementare used for jointly coating a flexible printed circuit board which enters the second space from the first space via the joint seam, so as to seal the second space. The shell component provided by theinvention has good sealing property. The invention further discloses a side key module and a mobile terminal.

The application relates to a power battery as well as a power battery cover plate and a manufacturing method thereof. The power battery cover plate comprises a cover plate body, an insulation protective layer covered on an inner layer of the cover plate body, and a post terminal penetrating through the cover plate body, wherein an injection molding layer for realizing a sealed connection between the post terminal and the cover plate body is arranged between the post terminal and the cover plate body, and the injection molding layer and the post terminal are molded through an injection moldingmode and form a chemical bond connection. According to the application, a chemically bonded injection molding layer is molded and formed on the surface of the post terminal by adopting an injection molding mode, the sealed connection between the post terminal and the cover plate body can be achieved by using the injection molding layer, and thus the problems of complex process, higher cost, low structural strength, lower reliability of the power battery and the like caused by adopting a riveting or snap spring structure for sealing in the prior art can be effectively avoided; and according tothe application, the complexity of a manufacturing process can be reduced through the injection molding mode, a low cost can be achieved, and the structural strength and the equipment reliability canbe ensured.

The invention discloses a glass fiber reinforced plastics pipeline sealing sleeve connector and a machining method thereof, which belongs to the technical field of a glass fiber reinforced plastics pipeline connector and a machining method thereof. The connector is used for connecting a left glass fiber reinforced plastics pipeline and a left glass fiber reinforced plastics pipeline. The glass fiber reinforced plastics pipeline sealing sleeve connector is characterized in that a connecting end on one side is an insertion end, a connecting end on the other side is a socket end, an insertion inner ring is concavely formed on the outer wall of the pipeline on the insertion end, the outer diameter of the insertion inner ring is smaller than that of the glass fiber reinforced plastics pipeline, an annular groove for accommodating a water-swelling rubber ring is formed on the middle part of the insertion inner ring, the insertion inner ring is sleeved by a stainless steel lantern ring, and the insertion inner ring is bonded with the stainless steel lantern ring by virtue of a bonding layer; a socket inner ring is concavely formed on the outer wall of the pipeline on the socket end, a sealing groove for accommodating a sealing ring is arranged on the middle part of the socket inner ring, and a grouting resistance-reduction through hole is formed on the edge, which is away from the socket end, of the socket inner ring. By adopting the double sealing of the water-swelling rubber ring and the elastically-deformed sealing ring, the connector is firm, durable and leak-free after being used for a long time.

The invention discloses a composite geo-membrane sealing joint and a manufacturing method thereof which are used for carrying out sealing connection between seams of composite geo-membranes while the composite geo-membranes are vertically paved underwater and are capable of enabling the composite geo-membrane sealing joint to be sealed and reliable and the structure strength of the composite geo-membrane sealing joint to be larger than the tension strength of the composite geo-membranes, and belongs to the field of foundation seepage-proofing engineering. The composite geo-membrane sealing joint adopts a connecting mode of sleeving inner sectional materials and outer sectional materials, the inner sectional materials and the outer sectional materials are respectively connected with the composite geo-membranes, and welding and adhesive connecting are carried out on the ground. According to the composite geo-membrane sealing joint and the manufacturing method, disclosed by the invention, solidifying materials can be poured into the inner sectional materials and an annular gap between two pipes after the inner sectional materials and the outer sectional materials are sleeved underwater, the sealing of the inner sectional materials and the outer sectional materials can be realized, and the sealing connection between the composite geo-membranes can be finally achieved. Due to the composite geo-membrane sealing joint disclosed by the invention, the situation of vertically paving the composite geo-membranes underwater becomes possible.

The invention provides a sealing component, which is used for sealing connection between a hollow fixing part and a tubular rotary part. The sealing component comprises a tubular sealing body. One open end of the sealing body is fixedly connected with the fixing part, and is used for communicating an inner cavity of the sealing body with an inner cavity of the fixing part. The other open end of the sealing body is sleeved on the outer wall of the rotary part, and is used for communicating the inner cavity of the sealing body with an inner cavity of the rotary part. The sealing body has a three-layer structure, each of an inner layer and an outer layer consists of a plurality of annularly distributed plates, gaps are reserved between adjacent plates of the inner layer as well as between adjacent plates of the outer layer, and an intermediate layer made from a flexible sealing material is arranged between the inner and outer layers. The inner sides of the plates of the inner layer at the other open end of the sealing body are connected with the outer wall of the rotary part. By the unique structural design of the sealing component, air leakage gaps can be controlled to be small and adapted to the deformation of the rotary part, so that a sealing effect is effectively improved.

The invention relates to the technical field of refrigeration equipment, in particular to a structure for reducing negative pressure in a box of a refrigerator, a refrigerator door body and the refrigerator. The structure for reducing the negative pressure in the box of the refrigerator comprises a refrigerator door body liner body, installation grooves are formed in the periphery of the refrigerator door body liner body, and air pressure balancing air guide grooves are formed in the installation grooves. Door sealing strips are arranged on the periphery of the refrigerator door body liner body. The extending ranges of the air pressure balancing air guide grooves are larger than the abutting-joint width ranges of the refrigerator door body linear body and the door sealing strips. The faces, facing the refrigerator door body liner body, of the door sealing strips are provided with installation parts, the installation parts are inserted into the installation grooves, wing sides are arranged on the two sides of the installation parts and are in interference fit with groove walls of the installation grooves, and the parts, located in the installation grooves, of the air pressure balancing air guide grooves pass through the abutting-joint positions of the wing sides and the groove walls of the installation grooves. The structure for reducing the negative pressure in the box of the refrigerator has the beneficial effects that the structure is simple, generation of the negative pressure is avoided, and the requirement of users in different regions for product convenience can be met.

The invention belongs to the technical field of pipeline connection, and provides a pipeline anti-seismic connection structure, which is installed at the junction of two transmission pipelines, including a connection pipeline, an anti-seismic clamp, a sealing ring and a connecting rod; the connection end of the transmission pipeline is inserted into the connection pipeline The anti-seismic clamps include two corresponding half clamps, the half clamps are semi-circular structures with different inner diameters on both sides, and the two half clamps are fitted on the conveying pipeline and connected by sealing rings. In the connection part of the pipeline, both ends of the half hoop body are provided with ear seats, and bolt holes for locking bolts are opened on the ear seats, and the two half hoop bodies are connected and fastened by the locking bolts and the first nut; the connecting rod There are at least two connecting rods, and the two ends of the connecting rod are detachably fixedly connected to the conveying pipe and the connecting pipe respectively through the connecting mechanism. The invention can make the pipeline connection maintain good connection sealing performance under the influence of earthquake and other external stresses, and improve the anti-seismic sealing performance of the pipeline connection.

The invention relates to a plug, a socket, and a sealing structure of an underwater electrical connector. The sealing structure comprises a plug and a socket that are plugged together. Outsides of pins are coated with sealing bodies partially; and exposed contact bodies are formed at the end portions of the pins and are arranged outside the pin-coated sealing bodies. Inner walls of jacks are coated with sealing bodies. In a plugging state of the pins and the jacks, the exposed contact bodies of the pins are in contact with contact bodies arranged inside the jacks electrically; and the pin-coated sealing bodies and jack-coated sealing bodies are in an interference fit mode. The sealing structure that is simple and reliable can be manufactured conveniently and has the good sealing performance. Because of the independence of all pins coated by pin sealing bodies, underwater plugging of an electrical connector is realized on the condition of having no load and replacement and maintenance become convenient. In addition, the invention also aims at providing a plug having advantages of simple and reliable structure and good sealing performance and aims at providing a socket having the same advantages as the plug.

The invention discloses a measurement and control layered water injection system comprising non-metal coiled tubing with a pre-embedded cable, and an operation method thereof. The measurement and control layered water injection system comprises the flexile composite coiled tubing with the pre-arranged, intelligent water distributors with cables, a ground controller and a matched PC control system.One end of the flexible composite coiled tubing is connected with one ends of the intelligent water distributors with the cables, and the other ends of the intelligent water distributors with the cables are connected with a screen pipe screwed plug and double-action valve. The other end of the flexible composite coiled tubing is connected with an injection machine, the pre-arranged in the flexible composite coiled tubing is connected with a PC through the ground controller, and downhole layered pressure and flow data are monitored in real time through remote cable bidirectional communicationfrom the downhole to the ground and from the ground to a station-control platform. According to the measurement and control layered water injection system comprising the non-metal coiled tubing with the pre-embedded cable, and the operation method thereof, the cable does not need to be bound during workover operation, construction is easy, the efficiency is high, the cost is low, no operation vehicle and equipment on the ground are needed, and the labor intensity is reduced substantially.

The invention provides a connecting mechanism of an implanted medical apparatus, the implanted medical apparatus and a connecting method of the implanted medical apparatus. The connecting mechanism ofthe implanted medical apparatus comprises a shielding sleeve and a sealing sleeve, wherein the shielding sleeve covers the periphery of the sealing sleeve, the sealing sleeve comprises a connecting cavity, the connecting cavity is used for installing a first connecting member inserted from one end of the connecting mechanism and a second connecting member inserted from the other end of the connecting mechanism, at the state that the first connecting member and the second connecting member are installed on the connecting mechanism, one end of the sealing sleeve is used for being connected to the outer circumferential surface of the first connecting member in a sealing manner, and the other end of the sealing sleeve is used for being connected to the outer circumferential surface of the second connecting member in a sealing manner. According to the connecting mechanism, while the shielding layers of the first connecting member and the second connecting member of the medical apparatus isconnected to prevent the RF-causing heating, the sealing of an electric connector of the first connecting member and the second connecting member is realized, and the connecting mechanism is simple and rapid in installation operation and reliable in connection.

The invention provides an improved FastGC column device capable of combination with an ion mobility spectrometer. Through hole connecting bases on two sides of the FastGC column and connecting parts for connecting the FastGC column with the through hole connecting bases in a sealing manner are arranged, and hollow connecting rods which can be in sealing connection with the ion mobility spectrometer are arranged at the other ends of the through hole connecting bases, so that sealing connection of the improved FastGC column device and the ion mobility spectrometer is achieved; furthermore, the improved FastGC column device also comprises a wound FastGC column and a thermal box for the connecting parts and the through hole connecting bases, wherein a heating device and a temperature sensor are arranged in the thermal box, therefore, the temperature controllability of the FastGC column is realized; all parts of the improved FastGC column device are connected simply and conveniently, the installation and the maintenance are convenient; besides, the outsourced thermal box is omitted, the cost is greatly reduced.

The invention discloses a negative-pressure filling valve. The negative-pressure filling valve comprises a valve base, a lower valve body is elastically and movably connected with the valve base, a valve opening is formed in the bottom of the lower valve body, a corrugated pipe is arranged inside the valve base, and the upper and lower ends of the corrugated pipe are hermetically fixed to the valve base and the lower valve body respectively; an inner cavity of the corrugated pipe is communicated with an inner cavity of the valve base above the corrugated pipe to form an upper valve cavity, anda lower valve cavity is formed by an inner cavity of the lower valve body and communicated with the valve opening; the upper end of a valve element stretches out of the top of the valve base, an airreturn pipe is connected to the bottom of the valve element, a lower port of the air return pipe is located outside the valve opening, the valve element is hollow to form an air channel, the air channel is communicated with the air return pipe, a sealing cover is fixedly arranged on the valve element, and a clamping and stopping part is arranged on the inner wall of a lower port part of the corrugated pipe. Under the effect of an elastic part, the clamping and stopping part of the corrugated part can be hermetically clamped and stopped on the sealing cover of the valve element, and then the upper valve cavity and the lower valve cavity are separated. The negative-pressure filling valve has the advantages that the structure is simplified, the sealing effect is good, and filling of various kinds of feed liquids is adapted to.

The invention discloses a cooking device and a steam valve assembly thereof. The steam valve assembly comprises a valve body and at least one steam hole formed in the valve body and further comprises a sealing device for sealing the at least one steam hole, the sealing device comprises a sealing lip edge arranged on the steam exhaust side of the at least one steam hole, the sealing lip edge is matched with the valve body to form a sealing cavity, the at least one steam hole communicates with the sealing cavity, and the steam exhaust side of the at least one steam hole is located in the sealing cavity; the sealing lip edge is elastically deformed under the negative pressure of the sealing cavity, and matched with the valve body to form a first sealing position enabling a steam valve to be separated; and the sealing lip edge is separated from matching with the valve body under the positive pressure of the sealing cavity to form a second sealing position enabling the steam valve to be connected. According to the cooking device and the steam valve assembly thereof, the good deformation sealing characteristic of the sealing lip edge is utilized, the sealing lip edge is directly utilized to be matched with the valve body to form the sealing cavity, compared with a traditional sealing form, a sealing ring does not need to be arranged on the valve body on the lower side any more, thus the structure is simpler, the cost is lower, and the sealing effect is good.

The invention provides an air conditioner and a short tube throttle valve thereof. The short tube throttle valve comprises a valve body, a first baffle block, a valve seat, a second baffle block, a primary valve core and a secondary valve core, wherein the valve body is provided with a flow channel; the first baffle block, the valve seat and the second baffle block are all fixedly connected with the inner wall of the valve body in a sealing manner; the first baffle block is provided with a first channel; the second baffle block is provided with a second channel; the primary valve core is arranged in the valve seat in a sealing and sleeving manner and can slide axially along the flow channel; the primary valve core is provided with a primary throttle channel which is communicated with the second channel, and an accommodating cavity which is communicated with the primary throttle channel; the two ends of the primary valve core can be respectively connected with the end surface of the first baffle block and the end surface of the second baffle block in a sealing manner; the secondary valve core is provided with a secondary throttle channel and a flow division through groove, and can slide axially along the flow channel, so that the primary throttle channel is communicated with the secondary throttle channel through the first channel when the secondary valve core is pressed against the accommodating cavity, and the primary throttle channel is communicated with the flow division through groove through the first channel when the secondary valve core is separated from the accommodating cavity. According to the short tube throttle valve, bidirectional throttling is realized, and the short tube throttle valve can be applied to a cold-warm air conditioner.

The invention relates to the technical field of building hardware, and particularly discloses a bidirectional transmission lock box for flat-opened doors and windows. The bidirectional transmission lock box for the flat-opened doors and the windows comprises a first wheel guard plate and a second wheel guard plate, and is characterized in that center holes, threaded column mounting holes, semicircle grooves, ratchet wheel grooves and small windows are formed in the first wheel guard plate and the second wheel guard plate correspondingly, a small mounting hole corresponding to the center hole is formed in the second wheel guard plate, driving gears are mounted in the center holes, a small gear is arranged in the small mounting hole, and clamping columns are arranged in the semicircle grooves; and the driving gears mesh with a first rack and the small gear, and the small gear meshes with a second rack. According to the bidirectional transmission lock box for the flat-opened doors and thewindows, the structure is reasonable, safety and reliability are achieved, the mechanical performance is stable, the transmission accuracy is high, the defects of unattractive mounting, poor transmission performance, poor use experience of the whole windows and the like in the prior art are overcome, the advantage of quick mounting is achieved, and the user experience of the doors and windows isimproved more advantageously.

A glass electric kettle comprises a main body provided with a handle and a bottom cap, wherein a heating tray and a seal ring are arranged in the main body. The glass electric kettle is characterized in that an annular opening on the periphery of the heating tray is arranged on the outer wall at an opening of the main body; the annular opening on the periphery of the heating tray and the outer wall at the opening of the main body with a clearance reserved therebetween are moveably connected, and move relatively to each other in a forced manner; the seal ring is filled into the clearance between the annular opening on the periphery of the heating tray and the outer wall at the opening of the main body, inflates while cannot fall off; The heating tray clamps the seal ring and the outer wall at the opening of the main body to generate an adsorption force to avoid falling off; the adsorption force is greater than the gravity of liquid filled into the main body, and the heating tray and the main body can be hermetically connected, so that the tightness of the connection between the heating tray and the main body is ensured, phenomena such as untight seal and water seepage are effectively prevented, and the quality of products is improved.

The invention discloses a waterproof wire passing system based on an aviation plug wire passing plug. The system comprises a mounting plate, an opening is arranged on the mounting plate, a mounting base is installed in the opening, a mounting groove is installed on the mounting base, a wire passing plug body is mounted in the mounting groove, a plurality of clamping blocks are arranged on the sideedge of one end of the wire passing plug body, clamping grooves matched with the clamping blocks are formed in the side wall of the mounting groove, and a fixing mechanism used for fixing the clamping blocks is installed on the side wall of the clamping grooves, the fixing mechanism comprises a fastening rod with the rectangular section and a rotating rod, movable grooves used for mounting the fastening rod in a sliding mode are formed in the side walls of the clamping grooves, and threaded holes communicating with the movable grooves are formed in the mounting base. By arranging the fixing mechanism, the wire passing plug body is fixedly installed in the mounting groove in the mounting base through the fixing mechanism, the effect of efficiently and rapidly installing and detaching the wire passing plug body is achieved, and then maintenance personnel can install, maintain and repair a cable conveniently.

The invention discloses a connector and a mobile terminal. Assembly of a display screen module and a shell can be realized quickly without gluing. The connector comprises a fixing body and a sealing body. The fixing body comprises a main body portion and a bending portion. The end of the main body portion bends to form the bending portion. The main body portion is detachably connected with the shell. The bending portion and the edge of the display screen module are in overlap joint. The sealing body is fixed to the top end of the bending portion, and is blocked in a gap between the shell and the display screen module.

The invention discloses a sealing device with a function of quick locking. The sealing device comprises a body base, an oil pipe penetrating through the body base, and an O-shaped ring which is arranged on the outer end face of a flange of the body base. The sealing device is characterized in that a symmetric rotation clamping device and a compression sealing device are arranged on the body base.In the design, the clamping technology that wedge surfaces compress pin shafts, the pin shafts transfer force to clamping blocks, and the clamping blocks are centered to tightly hold a pipe piece is adopted, and the integrated cone-sleeve cooperation sealing technology that the sealing ring is axially compressed is adopted. The device has no requirements for a special structure of a steel pipe piece connection end, the device is easy to assembly, install and operate, the structure is compact and smart, the cost is low, the practicability is high, and the device can be reused.

The invention discloses a centrifugal casting machine door-stop plate automatic mounting device comprising a die and a door-stop plate; the front end of the die is axially provided with a front stop ring assembling body fixedly connected with the die; the front end face of the front stop ring assembling body is provided with a plurality of claw mechanisms; a pneumatic claw assembling body is arranged in front of the front stop ring assembling body on a same axial line; an end face, opposite to the front stop ring assembling body, of the pneumatic claw assembling body is provided with a plurality of machinery finger mechanisms; a spring device assembling body is axially arranged between the pneumatic claw assembly body and the front stop ring assembling body. The device can realize automatic mounting of the centrifugal casting machine door-stop plate with high reliability, thus realizing automation operation, effectively preventing leak-out phenomenon, and ensuring normal production of the equipment.

The invention discloses a pressure vessel. The pressure vessel comprises a tank, a stirring device and a hydraulic driving device, wherein an accommodating cavity is defined in the tank; the stirringdevice is arranged in the accommodating cavity; the hydraulic driving device comprises a hydraulic motor arranged in the tank and a hydraulic pump, a rotary output shaft of the hydraulic motor is connected with the stirring device to drive the stirring device to rotate, the hydraulic pump is arranged on the outer side of the tank, the hydraulic motor and the hydraulic pump are connected through aconnecting pipe assembly, and the connecting pipe assembly and the tank are in non-dynamic seal manner. According to the pressure vessel, sealing between the hydraulic driving device and the tank is simple, the sealing reliability is high, and the cost is low.

The invention discloses a section bar double-opening casement window which comprises an upper window body and two lower-opening window bodies, wherein the top layer of the upper window body is fixed in a first top-layer section bar connecting structure, two side surfaces of the upper window body are fixed in a first side surface section bar connecting structure, the bottom layer of the upper window layer is fixed in a first bottom-layer section bar connecting structure; the top layers of the two lower-opening window bodies are arranged in a second top-layer section bar connecting structure, two outer sides of the two lower-opening window bodies are arranged in a second side surface section bar connecting structure, two inner sides of the two lower-opening window bodies are arranged in a third side surface section bar connecting structure, and bottom layers of the two lower-opening window bodies are arranged in a second bottom-layer section bar connecting structure; the first bottom-layer section bar connecting structure and the second top-layer section bar connecting structure are in sealed and in fitted connection through a first middle connecting structure, two inner sides are in sealed and in fitted connection through a second middle connecting structure. The section bar double-opening casement window is simple in structure, strong in structural symmetry, simple in installation structure, easy to operate, high in stability, freely adjustable in thickness of window bodies, wide in applied range, lowered in production cost, and economical.

Disclosed is a pressure sensor arrangement (10) for detecting a pressure of a fluid medium in a measurement chamber. The pressure sensor arrangement (10) comprises a sensor housing (12), at least one sensor element (18) which is arranged in or on the sensor housing (12) in such a way that it can be exposed to the medium in order to measure a pressure of the medium, a pressure connection (14), by means of which the pressure sensor arrangement (10) can be fitted on or in the measurement chamber, and a housing base (16) on which the sensor housing (12) is arranged. The housing base (16) is configured as a metal sheet (30). The housing base (16) has at least one elastically deformable retaining element (34) for fastening the sensor housing (12) to the housing base (16).

The invention particularly relates to a side welding method of a deformable metal foil structure with a small initial inclined angle, and belongs to the field of special welding and connecting of deformable metal foil structures. The invention aims to solve the problem that the side of a deformable metal foil structure with a small initial inclined angle is difficult to weld. The side welding method comprises the following steps: first, the arrangement of a connector; second, the arrangement of six spot welding positions; third, compression molding to obtain a before-brazing deformable metal foil structure ; fourth, spot welding to obtain an after-spot welding structure; and fifth, the adoption of a heat treatment furnace to complete the side welding of the deformable metal foil structurewith the small initial inclined angle. The side welding method has the advantage of being capable of bearing 1.2 atm pressure difference. The side welding method is mainly used for side welding of thedeformable metal foil structure with the small initial inclined angle.

The invention relates to a gutta percha filling device for conical surface sealing gutta percha. The device includes a push rod cylinder outer sleeve fixedly mounted on a handle of the filling device,a shell sleeve fixedly sleeving the front end of the push rod cylinder outer sleeve, and a head cylinder sleeved inside the shell sleeve; the front end of the head cylinder protrudes out of the shellsleeve and is fixedly provided with a gutta-percha needle; the rear end of the head cylinder is provided with a gel supplying hole communicating with a pin hole of the gutta-percha needle, and the rear end of the head cylinder is sleeved with a push rod cylinder; a cylinder hole communicating with the gel supply hole is coaxially disposed on the push rod cylinder, wherein the gel supply hole is aconical hole; the front end of the push rod cylinder is provided with a conical column which cooperates with the conical hole, and the conicity of the conical hole is the same as the conicity of theconical column; and the outer conical surface of the conical column is closely attached to the inner conical surface of the gel supply hole. The gutta percha filling device of the invention adopts a tapered surface to establish a close connection between the head cylinder and the push rod cylinder to achieve a sealed connection between the two, so as to avoid leakage of gutta percha from here, andthe device has the characteristics of simple structure, stability and reliability, and no gel-spilling.