1642 results about "Closed cavity" patented technology

The disclosure provides smart swimming goggles, including a swimming goggle eyecup, a housing attached to the swimming goggle eyecup and internally provided with a closed cavity, and a near-eye display system arranged in the closed cavity of the housing; the near-eye display system includes a light source device, an optical assembly at least including a waveguide lens, a processor, and a wireless communication module; an area, right facing the waveguide lens, of the housing is a light-transmitting area; the optical assembly is configured to transmit projection light outputted by the light source device to a human eye through the waveguide lens; the processor is in communication connection with an external terminal device through the wireless communication module, so that information interaction between the processor and the external terminal device is facilitated; and the housing is further provided with a waterproof key-attached to the processor and configured to send a trigger instruction to the processor when pressed, so that the processor controls a working state of the light source device according to the trigger instruction. According to the smart swimming goggles in the disclosure, more swimming information data is able to be provided for a swimmer, the swimming interestingness is enhanced, and the personalized requirements of a user are met.

An article of footwear including an upper and a sole structure. The sole structure includes a midsole, wherein the midsole includes an enclosed cavity, a thermoformed cushioning element disposed within the enclosed cavity, wherein the cushioning element includes an upper barrier film and a bottom barrier film enclosing an internal volume, and an outsole layer, wherein the outsole layer forms a ground-engaging surface of the article of footwear.

The utility model relates to an armored temperature and pressure integrated sensor, and the sensor comprises an armored housing which comprises a housing body and a sleeve connected with the housing body, and the sleeve is internally provided with a closed cavity; the circuit board is arranged in the armored shell; the temperature sensing element is mounted in the closed cavity; the support is arranged in the armored shell and comprises a support body, a metal terminal is arranged in the support body, one end of the metal terminal extends into the armored shell to be connected with the temperature sensing element, and the other end of the metal terminal extends out of the support body to be connected with the circuit board; and the pressure sensing element is mounted in the bracket and connected with the circuit board, and the pressure sensing element is used for detecting the pressure of an external pressure source. While temperature and pressure are measured synchronously, the excellent performance of the armored shell effectively protects internal elements from external physical impact, electromagnetic interference, severe temperature fluctuation and the like, it is ensured that the sensor can work stably and reliably in a complex environment and a complex medium, and the measurement precision is ensured.

The invention provides a pot support, and relates to the technical field of gas cooks.The pot support mainly comprises a ring body, and the outer edge of the ring body is higher than the inner edge of the ring body so that a combustion area can be defined; an upper cavity and a lower cavity which are stacked and independent are formed in the ring body; the lower cavity is a closed cavity; an air inlet hole and an air outlet hole which are communicated with the interior and exterior of the upper cavity are formed in the cavity wall of the upper cavity to form a channel for high-temperature gas to flow; the air inlet and the air outlet are arranged away from each other; the air outlets face the through hole in the bottom of the ring body. According to the embodiment provided by the invention, part of generated high-temperature gas is sucked into the upper cavity from the air inlet holes in the high position, the high-temperature gas flows along the upper cavity, heat of the high-temperature gas is conducted through the cavity wall, the temperature of the whole pot support is greatly increased, the heated pot support directly conducts efficient heat conduction heating on a pot, and the heating efficiency is improved. And the high-temperature gas finally flows downwards and flows out from the gas outlet hole, and flows upwards and is sucked into the upper cavity, so that heat circulation is formed, and the overall heat efficiency is remarkably improved.

The invention discloses a self-setting packer and a using method, and belongs to the technical field of packers.The self-setting packer comprises a base body unit, a setting unit and a control unit; the base body unit is sleeved with the setting unit and the control unit, and the control unit is located on one side of the setting unit. The control unit is connected with the setting unit; a negative pressure cavity is formed between the setting unit and the base body unit; a closed cavity is formed among the base body unit, the setting unit and the control unit. A dissoluble material is arranged in the control unit; and one end of the dissoluble material is communicated with the closed cavity. According to the self-setting packer disclosed by the invention, the rubber sleeve is compressed by virtue of hydrostatic pressure of a shaft, so that an oil sleeve annulus is sealed, two-way pressure can be borne, and meanwhile, the packer can be unsealed; the device has the advantages of simple structure, no need of manual control, no need of external power, self-setting and the like.

The invention belongs to the technical field of fire fighting, and particularly relates to an intelligent fire extinguishing device for fire disasters, which comprises a valve body, a valve plate for sealing a connecting port is connected in the valve body in an up-down sliding manner, a valve rod in threaded connection with the valve body is arranged on the valve plate, and a sealing plate is arranged on the valve rod at the upper end of the valve plate. The supporting block is provided with a drainage hole for water to flow back, after water flow is cut off, a cavity is formed between the closing plate and the valve plate, the water flow in the closed cavity can be recycled, and then residual water in the closed valve body is continuously gathered at the closing plate, can be gathered into the drainage hole and is collected and recycled into the cavity through the drainage hole. Meanwhile, uniform recovery is conducted, drainage and convergence of water flow on the closing plate are accelerated through driving of the adjusting assembly, and therefore residual water is little, the retention time is short, the corrosion and rust degree is reduced, and the service life is prolonged.

The invention relates to a laser radar and a vehicle. The first shell and the second shell of the laser radar can form a closed cavity in a surrounding mode, and the laser radar internal module is located in the cavity. The window area of the first housing is used for transmitting laser or receiving laser of the laser radar. The first shell of the laser radar is the continuous curved surface, and the included angle between the tangent plane of any point of the window area and the horizontal plane is smaller than 45 degrees, so that the laser radar has a smooth appearance line, the appearance of a vehicle cannot be obviously highlighted when the laser radar is installed on the vehicle, the laser radar can be better fused with the appearance of the vehicle, and the appearance aesthetic feeling of the vehicle is improved; and the wind resistance of the vehicle is reduced.

The invention discloses a self-adaptive fitting ultrasonic probe flexible accessory which comprises a flexible cover sleeve body, and the flexible cover sleeve body is made of a medical-grade elastic material and is provided with a containing cavity matched with an ultrasonic probe in shape; the sealing opening is formed in the bottom of the flexible cover sleeve body and is used for tightly wrapping the emitting surface of the probe; the liquid storage cavity is a closed cavity and is pre-filled with a high-viscosity medical ultrasonic coupling agent; the self-adaptive attaching layer is composed of the bottom wall of the flexible cover sleeve body. Wherein the liquid storage cavity is located between the sealed opening and the self-adaptive attaching layer, and the coupling agent is evenly distributed on the contact interface of the probe and the skin under the action of pressure; the probe is matched with a common ultrasonic probe, and the imaging effect of the probe in an uneven body surface area is improved on the premise that the main body structure of the probe is not changed.

The invention discloses an efficient thermal recovery packer, and relates to the technical field of oil field downhole tools. The upper cooler and the lower cooler are both of a heat pipe structure, the upper cooler and the lower cooler are both of a closed cavity structure, capillary objects are bonded to the inner wall of a cavity, the cavity is filled with working fluid, and air pressure in the cavity is in a negative pressure state. The device has the beneficial effects that the outer circle of the lower cooling disc expands when the lower cooling disc is heated, the outer circle of the lower cooling disc is elastically attached to the inner wall of the sleeve, steam can be directly blocked on the lower side of the rubber barrel, meanwhile, the lower cooling disc makes direct contact with the sleeve and can exchange heat with the sleeve below the rubber barrel, and the temperature of the sleeve making contact with the rubber barrel is reduced; the temperature of the rubber sleeve is further reduced, the sealing performance of the rubber sleeve is improved, the service life of the rubber sleeve is prolonged, an annular groove in the outer circle of the lower cooling disc enables an annular space to be formed between the lower cooling disc and the sleeve, and heat insulation and elastic connection are facilitated.

The invention relates to the technical field of hydraulic valves, and discloses a buffer overflow valve which comprises a shell, a first sealing ring is arranged on the surface of the shell, a connecting block is fixedly connected to the right end of the shell, an adjusting assembly is arranged in the connecting block, and a storage assembly is fixedly connected to the side, close to the shell, of the adjusting assembly. A moving assembly is arranged in the storage assembly, a spring is arranged between the storage assembly and the moving assembly, the adjusting assembly comprises a threaded rod, the surface of the threaded rod is in threaded connection with a connecting block, and the surface of the threaded rod is in threaded connection with a locking nut. A closed cavity is formed between a connecting column and a fixing seat, a second sealing ring is used for sealing, a valve element and an oil way in the connecting column are communicated with the closed cavity, the cavity is filled with oil, and when the oil on the left side of the valve element rises, due to the existence of the oil in the closed cavity, the valve element cannot instantly leave a valve seat at the bottom of a valve block; therefore, the buffer overflow valve can be opened at low pressure, and pressure impact cannot be generated.

Disclosed is a spherical roller bearing comprising: at least an outer ring and an inner ring; two groups of spherical rollers; and at least one cage configured to retain the spherical rollers, the cage comprising at least one axially inner cage ring, a first axially outer cage ring and a second axially outer cage ring extending in a circumferential direction of the spherical roller bearing, the first axial outer retainer ring and the second axial outer retainer ring are respectively separated from the axial inner retainer ring and are connected to the axial inner retainer ring through a plurality of retainer rods to form a closed cavity; each pocket is configured to receive one spherical roller and has an axially inner pocket side face and an axially outer pocket side face configured to restrain the spherical roller in the axial direction, each cage bar has a curved portion extending in the axial direction in the circumferential direction, the curved portion is at least partially concave, and in the axial direction, the curved portion is at least partially concave. The distance between the vertex of the bending part and the side face of the axial inner cavity lattice is different from the distance between the vertex of the bending part and the side face of the axial outer cavity lattice.

The three-dimensional shaping cloth flattening device comprises a base, a top plate and a lifting plate, a constant-pressure flattening head is arranged on the bottom face of the lifting plate, the constant-pressure flattening head comprises a constant-pressure air chamber shell, a flexible pressurizing bag and a constant-pressure mechanism, and the flexible pressurizing bag and the constant-pressure air chamber shell are connected in a sealed mode to jointly form a closed cavity; the constant-pressure mechanism is mounted in the constant-pressure air chamber shell and is used for providing constant reference pressure for the flexible pressurizing bag; a driving mechanism is fixedly arranged on the upper surface of the top plate and used for driving the constant-pressure leveling head to move relatively. According to the three-dimensional cloth flattening device, the problem that three-dimensional cloth is not completely flattened or damaged due to uneven pressure can be solved, and the high-quality and lossless three-dimensional flattening effect is achieved.

The invention provides a scroll compressor cross ring dynamic strain wireless measuring device, which relates to the technical field of compressor state monitoring and comprises a high-temperature-resistant strain gauge, a wire fixing system and a wireless sensor. Wherein the high-temperature-resistant strain gauges are respectively attached to stress sensitive areas of a static key, a ring beam and a movable key of the cross ring every time; the wire fixing system comprises a three-stage fixing structure formed by an adhesive, an internal wire, an external wire and an internal binding post; the three stages of fixing structures are a strain gauge end fixing structure, a lead transition section fixing structure and a binding post end fixing structure in sequence; the high-temperature-resistant strain gauge is connected with the wireless sensor through an internal wire, a binding post and an external wire, and continuous signal collection is achieved. By implementing operation according to the technical route, the impact load borne by the cross ring at the moment of starting and stopping of the compressor can be collected in a high-quality mode, data collection in a closed cavity is achieved, and an experimental basis is provided for subsequent strength design of the cross ring.

The utility model discloses a double-suction double-discharge reciprocating injection pump which comprises a pump body, a liquid inlet pipe and a liquid outlet pipe, two pistons are arranged in an inner cavity of the pump body at intervals in the length direction, the two pistons are movably assembled with the inner cavity of the pump body in a sealing mode, and the inner cavity of the pump body is divided into a first closed cavity, a sterilization air cavity and a second closed cavity by the pistons, a linkage rod located in the sterilization air cavity is arranged between the two pistons; one end of the pump body is provided with a first interface and a second interface which are respectively communicated with the first closed cavity, the other end of the pump body is provided with a third interface and a fourth interface which are respectively communicated with the second closed cavity, the first interface and the third interface are both communicated with the liquid inlet pipe, and the second interface and the fourth interface are both communicated with the liquid outlet pipe; one-way valves are arranged in the first connector, the second connector, the third connector and the fourth connector respectively. The liquid balance device can solve the problem of liquid balance of continuous blood purification equipment in a vibration impact environment of a moving occasion, simplifies the principle, and improves the reliability.

A vessel for transporting a living organ includes a container having an open top end and a closed bottom end, and a lid configured to selectively cover the open top end of the container and seal an inner chamber. The container includes a rigid outer housing, a rigid inner housing positioned within the rigid outer housing, and an insulating layer. The rigid inner housing defines the inner chamber, which is configured to hold a living organ. The rigid inner housing and the rigid outer housing define a closed cavity therebetween, in which the insulating layer is positioned.

A highly sealed invasive biosensing assembly and a biological information monitoring apparatus. The present invention relates to the technical field of biosensors. The highly sealed invasive biosensing assembly comprises a biosensor, and an electrode-protecting cover is snap-fitted to the lower part of the biosensor. A guide needle is snap-fitted into the biosensor, longitudinally penetrating the biosensor. The biosensor further comprises a sensing electrode and an electrode pressure plate. In a first state, the electrode pressure plate, the lower part of a needle guide seat, and the interior of the electrode-protecting cover form a first closed cavity. In a second state, the electrode-protecting cover is detached from the biosensor, so that at least part of the sensing electrode entering the first closed cavity and at least part of a needle body extend out of the first closed cavity. The invasive biosensing assembly and the biological information monitoring apparatus form a closed space inside the assembly and the apparatus by means of a snap structure and the positional relationship between components during assembly, thereby improving the hermeticity in the assembly and the apparatus, so that the assembly is in a sterile state before being implanted into a human body.

The invention discloses split type miniature signal transmission equipment, which comprises processing equipment, a cable and a detection probe, and is characterized in that the cable is connected in series with at least one connecting mechanism, so that the cable can be extended or connected with the probe; the connecting mechanism comprises a connecting shell, a conductive plugging assembly is arranged in the connecting shell, one end of the connecting shell is provided with a mechanical connecting part, the mechanical connecting part comprises jacks and connecting pieces which are alternately arranged, and the connecting pieces can be locked through locking assemblies; after the connecting piece is inserted into the jack, a closed cavity is formed at the bottom of the jack, and the cable connection stability is improved through a dual anti-loosening mechanism of negative pressure adsorption and mechanical locking; the connecting shell is further provided with a miniature one-way valve, a decompression assembly, a wire protecting sleeve, a sealing gasket and other structures, the conductive plugging assembly comprises a plug and a socket assembly, the pin unit adopts a double-pin design, and through a rigid connection mode and an elastic connection mode, the stability of conductive plugging is ensured, the situation that detection is affected by too long or insufficient cables can be avoided, and the detection efficiency is improved.

In some embodiments, a pressure sensor may comprise a housing, a flexible membrane which, together with the housing, forms a hermetically closed cavity, a sensor element arranged in the hermetically closed cavity, and a gaseous medium in the hermetically closed cavity. The sensor may detect a change in a physical property, of the flexible membrane, associated with an external pressure pressing inward into the flexible membrane of the hermetically closed cavity.

A fishing tool (1) for performing a fishing operation to recover an object (2) in a subterranean well (3), comprising: an outer shell segment (100); an inner shell segment (200); wherein the tool (1) is configured to be moveable between: a scooping configuration wherein the outer shell segment (100) and the inner shell segment (200) are at least partially overlapping and form an open chamber (1200B) for receiving the object (2) into in use; and a closed configuration wherein the outer (100) and inner (200) shell segments form a closed chamber (1200A) for trapping the object (2) therein in use; wherein the tool (1) is configured to scoop the object (2) into the open chamber (1200B) in use by rotation of the outer (100) and / or inner (200) shell segments; and wherein the tool (1) is configured to move between the scooping configuration and the closed configuration by relative rotation of the outer (100) and inner (200) shell segments.

The invention discloses an embedded injection mold, and relates to the technical field of mold injection, the embedded injection mold comprises an upper mold set, a lower mold set is mounted below the upper mold set, an embedded auxiliary mechanism is arranged below the lower mold set, and the embedded auxiliary mechanism comprises an upper moving plate and an upper assembly pipeline which are symmetrically distributed below an insert main body; the lower portion of the upper assembling pipeline is communicated with a lower assembling pipeline, a lower moving plate is installed in the lower assembling pipeline, the upper moving plate and the upper assembling pipeline form a closed cavity in the downward moving process, generated negative pressure is transmitted to the insert through the hole discharging piece, and a multi-layer round hole pipe of the hole discharging piece is matched with the outline of the irregular insert according to the height difference. Compared with the prior art, the positioning pin has the advantages that the positioning pin is firstly adsorbed from the edge and then transited to the center, deformation of the insert caused by single-point stress is avoided, meanwhile, direct friction between a positioning part and the insert is reduced through non-contact adsorption, the problem of abrasion of a traditional positioning pin is avoided, frequent maintenance and replacement are not needed, long-term positioning accuracy is guaranteed, and production interruption time is shortened.

The application discloses a sample refrigeration storage device and a sample pipeline analysis system. The sample refrigeration storage device comprises a refrigeration storage area, a refrigeration storage area frame, a refrigeration placing rack and a first refrigeration mechanism; a refrigeration operation area, an operation area frame, a sample sorting mechanism, a sample rack loading mechanism and a second refrigeration mechanism, the operation area frame is communicated with the storage area frame to form a closed cavity, the sample sorting mechanism and the sample rack loading mechanism can cooperate to load out the sample to be loaded out on the refrigeration placing rack through an entrance and exit, and load the sample to be loaded in into the refrigeration placing rack through the entrance and exit; a sample transmission track; and a central control system. Since the sample sorting mechanism is located in the refrigeration operation area, when the sample is retained, the second refrigeration mechanism makes the sample in a low-temperature environment, reduces the corruption and invalidation of the sample, reduces the sample collection frequency, and improves the sample detection efficiency.

The invention discloses a vehicle-mounted microwave oven smell and VOC release detection and evaluation method and system based on vehicle-mounted high-temperature closed environment simulation. The method comprises the steps that a microwave oven to be detected is placed in a closed test cavity and sealed; the cavity is placed in a heating device to be heated to the preset high temperature and kept for the set time; the VOC sensor is used for monitoring the VOC concentration in the cavity in real time; collecting a gas sample through the sampling interface at the last test stage; performing standard sensory evaluation on the sample by an evaluator; carrying out comprehensive grade evaluation by combining the VOC concentration data and the smell grade score; according to the invention, the special closed cavity is arranged in the oven with accurate temperature control, high-temperature stress is directly and uniformly applied, and the released VOCs are ensured to be gathered in a limited space by utilizing the sealing property of the cavity, so that the VOCs are released in an accelerated manner under the most sensitive temperature and humidity condition of the material of the microwave oven to be detected, and the detection accuracy of the microwave oven to be detected is improved. The obtained release level and odor characteristics are highly related to the experience of the user in the actual vehicle-mounted scene.

The utility model provides an electrical cabinet heat radiation structure and an electrical cabinet, which belong to the technical field of electrical equipment and comprise a cabinet body, a heat exchanger, a first fan and a second fan. The cabinet body is provided with a closed cavity; the heat exchanger is arranged at the upper half part of the rear side plate of the cabinet body; the heat exchanger is provided with an internal circulation air outlet and an internal circulation air return port, the internal circulation air outlet and the internal circulation air return port both face the front side plate of the cabinet body, and the internal circulation air outlet is located below the internal circulation air return port; the first fan is arranged at the front lower part of the internal circulation air outlet, and the air outlet end faces the lower side plate of the cabinet body; the second fan is arranged at the front lower corner point of the closed cavity, and the air inlet end faces the rear side plate of the cabinet body. According to the utility model, the first fan is matched with the second fan, so that cold air output by the heat exchanger can circularly flow in the closed cavity, an airflow flowing path is enlarged, and the heat of an area far away from the heat exchanger in the closed cavity can be dissipated, so that the problem of local hot spots is avoided, and the overall heat dissipation effect of the electrical cabinet is improved.

The application provides a one-time forming electron beam welding method for a titanium alloy component with single-sided incidence and double-layer welds, which comprises the following steps: a closed cavity structure titanium alloy component is formed by a plurality of mutually shielded multi-layer thin plates through single-direction electron beam incidence; the focusing current of the electron beam is adjusted; the converging effect of the electromagnetic coil is changed to change the focus position, and then the electron beam keyhole depth and size are changed; the keyhole is adjusted to be an energy channel through which the electron beam passes; the electron beam energy can pass through the first layer of welds to reach the second layer of welds; the controllable linear energy is provided by combining the acceleration voltage, the welding current and the welding speed to ensure that the remaining energy that penetrates reaches the second layer of welds to complete the welding of the second layer of welds again; the low-frequency scanning is combined with the electron beam movement to drive the first layer of molten pool metal to flow and fill the rear channel, and the front channel is opened, so that the channel is dynamically smooth and stable, and the electron beam keyhole effect behavior is adjusted.

The invention provides a vertical liquid damper which comprises a closed container, buffer liquid, a horizontal partition part and a horizontal energy dissipation part, a base connected with an external structure to be subjected to vibration reduction is arranged at the bottom of the closed container, and the interior of the closed container is divided into at least two independent closed cavities by the horizontal partition part; each closed cavity is filled with the buffer liquid flowing in a collision mode, the horizontal energy dissipation pieces are arranged in the closed cavities, each horizontal energy dissipation piece comprises a middle hollow channel and a peripheral baffle, and the peripheral baffle is provided with a pore structure for the buffer liquid to pass through in the vertical movement process. The device has the advantages of effective dissipation of vertical vibration energy, simple structure and the like.

A thermal pad and an electronic device are disclosed for effectively dissipate heat of an electronic component. The thermal pad includes a first cover, a second cover, an elastic shell, and liquid metal. The elastic shell is bent and closed into a tubular structure. The first cover and the second cover are respectively mounted at two ends of the tubular structure to form a closed cavity. The closed cavity is configured to accommodate the liquid metal. Filling the liquid metal into the elastic shell implements good heat conduction effect by using high thermal conductivity of the liquid metal, and implements compression on the thermal pad during assembly of the thermal pad by using compressibility of the elastic shell, to reduce a thickness of the thermal pad.

The invention discloses a neck embedded ring type Helmholtz resonator, which relates to the technical field of low-frequency sound absorption structures and comprises a resonator main body, an embedded neck and a porous material lining. The resonator main body comprises an outer wall surface and a closed cavity; the embedded neck part penetrates through the top wall surface of the main body and comprises a neck part wall surface and an internal periodic convex ring structure; the porous material lining is attached to the inner wall of the closed cavity, and a first gap is formed between the porous material lining and the wall face of the neck. According to the resonator, the sound energy dissipation capacity and parameter harmonility are improved through the neck circular ring, the low-frequency sound absorption capacity is enhanced through the porous material in the cavity, the sound absorption peak value and frequency can be regulated and controlled by adjusting the parameters of the neck and the circular ring and selecting the type of the porous material, and the resonator is simple in structure, wide in application and beneficial to production.

The invention relates to the field of solar heating, in particular to a solar heat exchange device which comprises a shell and a bottom plate, the shell and the bottom plate form a closed cavity, a heat absorption layer is arranged on the outer surface of the shell, a heat conduction pipe and a phase change energy storage material are arranged in the cavity, and the inlet end and the outlet end of the heat conduction pipe extend out of the side wall of the shell. The phase change energy storage material is arranged around the heat conduction pipe and fills the cavity, a thermal expansion layer is arranged on the inner surface of the bottom plate, and the thermal expansion layer is arranged at the bottom of the cavity. In the invention, the thermal expansion layer is located below the phase change energy storage material. When the temperature rises, the volume of the thermal expansion layer is increased and pushes the phase change material upwards, so that the liquid level of the phase change material is raised, and the phase change material can be in close contact with the top heat absorption layer continuously even in a liquid state. The problems of gaps and thermal resistance caused by volume shrinkage of the phase change material are effectively avoided, it is guaranteed that heat can be efficiently transmitted to the energy storage medium, and therefore the heat transfer efficiency of the solar heat exchange device is remarkably improved.

The utility model discloses a transformer gas relay protection structure, which relates to the technical field of power equipment protection, and comprises an insulation protection sleeve, a first sealing cover plate and a second sealing cover plate, and the insulation protection sleeve is located between the first sealing cover plate and the second sealing cover plate. Mounting holes matched with the first sealing cover plate and the second sealing cover plate are formed in the left end and the right end of the insulating protective sleeve respectively, and the first sealing cover plate and the second sealing cover plate are detachably connected to the mounting holes in the left end and the right end of the insulating protective sleeve respectively, so that a closed cavity used for containing the gas relay is defined; the first sealing cover plate and the second sealing cover plate are each provided with an oil pipe hole and a threading hole, the oil pipe holes are used for allowing oil pipes of the gas relays to penetrate through, and the threading holes are used for allowing secondary wires of the gas relays to penetrate through. The gas relay has a simple structure, is convenient to install, and can effectively prevent rainwater and small animals from entering the gas relay through the integral encapsulation and insulation design, thereby effectively improving the safety of equipment.

The utility model relates to an X-ray tube anode target disc fixing structure which comprises a rotor, and an anode target disc, a fixing nut, an anti-loose gasket and a locking cover are sequentially installed on the rotor. The locking cover tightly presses the anti-loose gasket, so that the anti-loose gasket generates elastic deformation between the fixing nut and the locking cover; the anti-loose gasket is a wave-shaped gasket; an anti-rotation structure is arranged between the rotor and the anode target disc, the anti-loose gasket is provided with 4-6 waveforms and is made of molybdenum alloy or tungsten alloy, and the rotor is in clearance fit with the anode target disc. The utility model has the advantages of high reliability, long service life and low assembly requirement, eliminates the gas retention risk of the internal closed cavity, and realizes the directional dredging of the gas by establishing a communication channel between the cavity and the external high vacuum environment.