88results about How to "Guaranteed zero leakage" patented technology

The invention discloses a gate valve and a manufacturing process thereof. The gate valve comprises a valve body with a T-joint structure, wherein an opening in the upper end of the valve body is connected with a valve cover; a valve stem penetrates into the valve body; the upper end of the valve stem is vertically connected with a handwheel, and the lower end of the valve stem is connected with a valve plate used for controlling opening and closing; a left connecting pipe and a right connecting pipe are respectively inserted into opposite openings on the left and right of the lower end of the valve body; the inner ends, adjacent to the valve plate, of the left connecting pipe and the right connecting pipe are respectively provided with a valve base; the peripheral surfaces of the left connecting pipe and the right connecting pipe are respectively welded and fixed together with the left and right side surfaces of the lower end of the valve body. Components, such as the valve body, the left connecting pipe and the right connecting pipe, in the gate valve are forged and molded, then are respectively processed and finally assembled without special fixtures, so that the labor strength is reduced, and the machining time is shortened.

The invention discloses a gas lubrication hydrodynamic sealing device used for a miniature high-speed turbo expander. The miniature high-speed turbo expander comprises a shell, wherein a main shaft and an impeller component are arranged in the shell; the impeller component is fixed on the main shaft; a bearing component is arranged out of the impeller component; the bearing component is sheathed to the main shaft; the sealing device is positioned between the impeller component and the bearing component and comprises a movable ring and a static component; the movable ring is sheathed to the main shaft; two ends of the movable ring are clamped between the impeller component and the bearing component; the static component is fixed on the shell; one end surface of the static component and themovable ring form a sealing surface; an end surface, which is laminated with the static component, on the movable ring is provided with a fluid hydrodynamic groove. Compared with the prior art, the sealing device disclosed by the invention is applied to the high-speed turbo expander, the zero leakage of bearing side lubricating oil to an exit side of the expander can be realized, and in addition,the internal gas loss of the expander is extremely small.

A PPR plastics permanent-magnet stop valve comprises a valve seat single-injection moulded of PPR plastics, a valve deck made of high-strength engineering plastics and metal connected with the valve seat via a flange plate and a bolt and an operating handle forming a threaded connection with the outside guide cover on the valve deck.

The invention relates to a composite graphite burning torch. The composite graphite burning torch comprises a burning torch body, a stove inner section of the burning torch body and a stove outer section of the burning torch body; the burning torch body is a cylinder body; a mounting flange for being mounted at a stove mouth sleeves between the stove inner section and the stove outer section; the stove outer section is provided with an air connector and a hydrogen connector, and a circuit board and a high-voltage pulse generator are arranged inside the stove outer section; the stove inner section is formed by sequentially embedding and connecting a first sleeve, a second sleeve and a combustion chamber; an air passage communicated with the air connector, a hydrogen passage communicated with the hydrogen connector, a needle hole A for mounting a flame probe and a needle hole B for mounting an ignition electrode B are arranged in the extended macro-axis direction of the first sleeve and the second sleeve, and the air passage and the hydrogen passage are sequentially arranged from outside to inside. The composite graphite burning torch has the advantages that the burning torch is formed by finishing composite graphite, is suitable for an auto-ignition system of an HCL synthesis production device, and is applicable to a high temperature condition as large spark-ignition of a high-frequency ignition transformer is adopted, meanwhile, the electromagnetic field interference generated by the composite graphite burning torch is lower than that generated by other components, and the burning torch is low in input current and power, and solves difficult problems of a poor anticorrosion and high-temperature resisting ability.

The invention discloses a photovoltaic motor-driven inclined bellow welding type stop valve, and relates to a stop valve, which is characterized in that: an inclined welding type valve body is overlaid with a Co base hard alloy seal ring; a titanizing austenite stainless steel bellow device is movably and mechanically connected between the lower part of a valve rod and the upper part of a valve flap; gaskets are embedded into convex-concave positions of the inclined welding type valve body contacting with a valve cover, and the valve cover are mechanically connected with the inclined welding type valve body through bolts, spring gaskets and nuts; the top of a motor is provided with a silicon solar panel; the silicon solar panel, the top rack of the motor and the top of the motor are mechanically connected; the electric-energy output end of the silicon solar panel is electrically connected with the two ends of a storage battery device; the electric-energy output end of a storage battery is electrically connected with a voltmeter and an ammeter; and the storage battery is electrically connected with an electric control device. The stop valve is applicable to pipelines of the oil industry, the chemical industry, the pharmaceutical industry, the power industry and the like under various working conditions.

The invention discloses a pneumatic actuating mechanism for a one-way damping valve and belongs to the technical field of catalytic cracking units of the petrochemical industry. The pneumatic actuating mechanism for the one-way damping valve comprises a first air cylinder, a second air cylinder, a shifting fork shaft, a shifting fork and an air cylinder reversing control unit. The rod portion of the shifting fork is fixedly connected with a valve shaft of the one-way damping valve. The air cylinder reversing control unit is used for controlling reversing of the first air cylinder and the second air cylinder. The pneumatic actuating mechanism further comprises an engagement and disengagement mechanism which is a cylinder body. The engagement and disengagement mechanism is provided with a guide groove in the longitudinal length direction. The two ends of the engagement and disengagement mechanism are fixedly connected with a piston rod of the first air cylinder and a piston rod of the second air cylinder correspondingly. The shifting fork shaft extends into a U-shaped opening formed in the end of the shifting fork and the guide groove in the engagement and disengagement mechanism. The shifting fork shaft can slide in the U-shaped opening and can conduct linear motion in the guide groove at the same time. The pneumatic actuating mechanism can improve the energy efficiency, guarantees that the one-way damping valve is closed under an emergency condition and protects the seal face of the one-way damping valve at the same time.

The invention relates to a sealing flashboard door, in particular to a sealing flashboard door for biomass feeding, and solves the problems of poor sealing effect, unsmooth opening and closing, jamming and blockage of an existing flashboard door. The sealing flashboard door for biomass feeding comprises a valve body front end, a valve body rear end, a feed port and a discharge port, wherein the valve body front end and the valve body rear end are both positioned at the front end and the rear end inside a valve body, the feed port is fixedly installed between the front end of the valve body andthe rear end of the valve body and located on the upper portion of the valve body, and the discharge port is located on the lower portion of the valve body. The sealing flashboard door for biomass feeding also comprises a plugboard assembly and a locking assembly, the plugboard assembly is in sliding connection with the bottom of the front end of the valve body and the bottom of the rear end of the valve body, and the locking mechanism is connected with the plugboard assembly. The sealing flashboard door can effectively solve the problems of unsmooth opening and closing, jamming, blocking, high failure rate and the like after frequent opening and closing.

The invention discloses a dynamic sealing structure suitable for a high-differential pressure environment, which is used for dynamic seal between a rotor and stators in the high-differential pressureenvironment. The stators include a first stator and a second stator, an antithrust positioning block is arranged on the rotor, the antithrust positioning block is located in a radial groove between the first stator and the second stator and comprises a radial electromagnetic bearing, an antithrust electromagnetic bearing and a magnetic fluid sealing device, the radial electromagnetic bearing sleeves the stators and is located between the stators and the rotor, the magnetic fluid sealing device sleeves the stators and is located between the stators and the rotor, and the antithrust electromagnetic bearing is arranged on the stators and is located in the radial groove. Because the electromagnetic bearing technique is introduced, the problems of conventional bearing grease lubrication and thelike are solved, and the problems of pollution of oil gas to high-pressure media and the like are solved; additionally, a magnetic fluid sealing technique is adopted, so that zero leakage or less leakage of the high-pressure media in the whole high-pressure system is guaranteed, and the purposes of support of the rotor in the high-pressure system and dynamic seal between the rotor and the statorsare achieved.

The invention discloses a low-energy-consumption braking switch and belongs to the field of engine valve driving and auxiliary braking. The low-energy-consumption braking switch comprises two hydraulic pistons arranged on a fixing part, a sliding valve body, a sliding valve return spring, a one-way valve core, a one-way valve return spring and the like. The driving modes and the braking modes are switched through a braking switch; and through match with different valve driving systems, the different schemes of various modes including the four-stroke driving mode, the two-stroke driving mode, the four-stroke braking mode, the two-stroke braking mode and the like can be achieved, and high-power, low-oil-consumption, low-emission and efficient graded braking is achieved. The low-energy-consumption braking switch is simple and compact in structure, high in reliability and low in cost.

The invention provides a motor-driven high-temperature-resistant corrugated pipe stop valve and relates to a motor-driven stop valve. The clamp connection type high-temperature-resistant corrugated pipe stop valve comprises a valve body. A titanizing austenitic stainless steel corrugated pipe device is movably and mechanically connected between the lower part of a valve rod and the upper part of a valve clack, the upper part of the valve rod is arranged in a motor drive head mandrel sleeve and is mechanically connected with the motor drive head mandrel sleeve, a lower head of the valve rod is movably and mechanically connected with the valve clack, the motor drive head mandrel sleeve is arranged in a motor drive head mandrel and is mechanically connected with a motor drive head device, the motor drive head mandrel is rotated to enable a lifting rod of the valve rod to drive the titanizing austenitic stainless steel corrugated pipe device to lift by the motor drive head mandrel sleeve, the motor drive head mandrel sleeve is arranged in an interior hole above a valve cover and is mechanically connected with the interior hole, and the motor drive head mandrel is arranged in the motor drive head mandrel sleeve and is mechanically connected with a traverse pin of the motor drive head mandrel sleeve. The dual firm and durable corrugated pipes have convenient disassembly and reliable sealing, and the motor-driven high-temperature-resistant corrugated pipe stop valve is suitable for pipelines with various working conditions in the petroleum industry, the chemical industry, the electric power industry, and the like.

The invention discloses a zero-leakage alkali discharging device, which comprises a rack, a device body arranged on the rack and a driving mechanism, wherein the device body comprises a housing, an impeller and a main shaft; the housing is volute-shaped, and the side surface and the spiral tail end are provided with an alkali inlet pipeline and an alkali outlet pipeline; one end of the main shaft is in transmission connection with the driving mechanism, the other end of the main shaft extends into the housing along the axial direction of the housing, the impeller is arranged in the housing and axially arranged at the other end of the main shaft, and the impeller is driven to rotate by the driving mechanism through the main shaft. Compared with the prior art, the alkali discharging device disclosed by the invention has the advantages of zero leakage, high efficiency, environment protection, no residual solution, ability of reducing resource waste and environmental pollution and the like, has great economic values and application values and is wide in application prospect, thereby being an optimal choice for transporting chemical solutions in each industry.

The invention relates to a low and medium-pressure pneumatic balanced stop valve which comprises a valve body provided with a water inlet channel and a water outlet channel, wherein a valve seat is arranged on the valve body; a sealing gasket is arranged at the contact part of the valve seat and the valve body; a valve clack is fixedly connected to the valve seat. The stop valve also comprises a cylinder seat and a cylinder barrel provided with an upper air source through hole and a lower air source through hole. A piston and a piston rod are arranged in the cylinder barrel. The bottom end of the cylinder barrel is fixedly connected with the valve body. One end of the piston rod is fixedly connected with the piston while the other end of the piston rod is fixedly connected with the valve seat. A guide platform is arranged below the cylinder seat. A guide barrel is arranged on the upper part of the valve clack. The guide platform and the guide barrel are in sealing cup joint. Under the conditions with any pressure difference of a water current medium, the opening and the closing of the stop valve are convenient, free, easy and labor-saving; the integral size of the valve is reduced; and the service life of the valve is prolonged.

The invention relates to a buckling connection type high-corrosion resisting bellow cut-off valve which belongs to cut-off valves. The buckling connection type high-corrosion resisting bellow cut-off valve comprises a buckling connecting type valve body on which a Co-based hard alloy seal ring is welded, a titanized austenitic stainless steel bellow device is movably connected to the lower part of a valve rod, a handwheel is rotated to enable a lifting rod of the valve rod to drive the titanized austenitic stainless steel dual bellow device to ascend and descend by a valve rod nut, the dual bellow which is firm and durable is assembled conveniently, the buckling connection and disassembly are convenient, and the product has reasonable structure and reliable sealing; and the Co-based hard alloy and the bellow titanized austenitic stainless steel which are welded on a sealing face have good properties of wearing resistance, corrosion resistance, abrasion resistance and long service life. The invention is suitable for cutting or communicating mediums on pipelines of various working conditions, such as petroleum and chemical industries, and the like.

The valve with double sealing couple is ball valve or butterfly valve, which consists of valve body and valve core inside valve body. There is a metal sealing couple consisting of the valve core metal seal ring set in external circle of valve core and the valve body metal seal ring set in internal circle of valve body in between valve body and valve core; there is a flexible sealing couple consisting of the valve body flexible seal ring set in internal circle of valve body and above valve core metal seal ring in between valve body and valve core. In this invention, the sealing couples in between valve body and valve core include the metal sealing couple and the flexible sealing couple. The metal sealing couple has strong mechanical strength, long life, and can be used as the main sealing tool, that is working sealing; the flexible sealing couple has good sealing performance, after close the valve, make sure no leak, can be used as turnaround sealing tooo. This invention is applicable for the inlet valve of water turbine in the hydroelectric power station.

A hydraulic drive high-temperature resistance corrugated pipe gate valve, relating to a hydraulic drive gate valve, comprises a valve body, wherein a hydraulic drive head device is mechanically connected with a hydraulic drive head device frame; the hydraulic drive head device frame is mechanically connected with a valve cover through a bolt, a spring gasket and a nut; a hydraulic drive head mandrel; the upper part of a valve rod and a hydraulic drive head mandrel sleeve are mechanically connected through a transverse pin; a Ti-plated austenitic stainless steel corrugated pipe device is movably connected between the lower part of the valve rod and the upper part of a gate plate, the lower part of the valve rod is mechanically connected with the gate plate, the Ti-plated austenitic stainless steel corrugated pipe device is driven to lift through a lifting rod of the valve rod. The hydraulic drive head can be used for automatic controlled pipelines, the flange connection is convenient to be disassembled, and the corrugated pipe with dual-firmness and durability is convenient to be disassembled, the sealing design of the corrugated pipe with dual-firmness and durability guarantees zero leakage of the valve rod. Due to no fluid loss, energy loss is reduced, and the safety of factory equipment is improved.

The invention discloses an emergency flap valve. The emergency flap valve comprises a valve body, a supporting seat, a valve plate assembly and a valve seat, wherein the valve body is mounted on the supporting seat; the valve plate assembly is matched with the valve seat. The emergency flap valve is characterized by further comprising a transmission device assembly; the transmission device assembly comprises a force applying mechanism, a swinging rotating mechanism and a rocker arm; the force applying mechanism and the valve body are arranged in a sealing manner; the force applying mechanism penetrates through the valve body and supplies driving force to the swinging rotating mechanism; the tail end of the swinging rotating mechanism is hinged with the rocker arm; and one end of the rockerarm is fixedly connected to the valve plate assembly while the other end of the rocker arm is hinged with the valve seat. The emergency flap valve is convenient to operate and remains zero leakage within certain underwater depth range; the transmission device is adaptive to the deformation of a ship body structure; a sealing material is resistant to abrasion, and high in ageing resistance; partsof hinging points are flexibly oppositely moved and are prevented from falling off.

The invention discloses an external thread connecting type high-temperature resistant corrugated pipe stop valve and relates to a stop valve which comprises an external thread connecting type valve body, wherein a Co-based hard alloy seal ring is welded on the external thread connecting type valve body; a titanizing austenite stainless steel dual corrugated pipe device is loosely and mechanically connected under a valve rod; and a handwheel rotates and causes a lifting rod of the valve rod to drive the titanizing austenite stainless steel dual corrugated pipe device to lift by a valve rod nut. A dual, hard and durable corrugated pipe is convenient for disassembly, external threads are convenient for connection and disassembly, a product has reasonable structure and reliable seal, and the zero leakage of the valve rod is ensured. The external thread connecting type high-temperature resistant corrugated pipe stop valve has the advantages of Co-based hard alloy welded on the seal surface, good abrasion resistance, corrosion resistance and friction resistance of corrugated pipe titanizing austenite stainless steel and long service life, is suitable for switching off or on a pipeline medium on a pipeline under various working conditions of petroleum, chemical industry, pharmacy, fertilizer, power industry, and the like and is particularly used for conduction oil boiler pipeline engineer.

The invention provides a clamp connection type high-temperature-resistant corrugated pipe stop valve and relates to a stop valve. The clamp connection type high-temperature-resistant corrugated pipe stop valve comprises a clamp connection type valve body, wherein a Co-based hard alloy sealing ring is resurfaced and welded on the valve body. A titanizing austenitic stainless steel dual-corrugated-pipe device is movably and mechanically connected below a valve rod, and a handwheel is rotated to enable a lifting rod of the valve rod to drive the titanizing austenitic stainless steel dual-corrugated-pipe device to lift by a valve rod nut. The dual firm and durable corrugated pipes are convenient to disassemble, the clamp connection is convenient to disassemble, and an exterior connection pipe and the sealing ring screw down a clamp component by a clamp fastening bolt through a spring shim so as to enable a pipeline to be rapidly sealed and connected. The clamp connection type high-temperature-resistant corrugated pipe stop valve is suitable for switching off or switching on pipeline media on pipelines with various working conditions in the petroleum industry, the pharmaceutical industry, the chemical fertilizer industry, and the like.

The invention discloses a cement curing line mixing stirrer, and relates to the field of cement curing equipment. The cement curing line mixing stirrer comprises a power device, a stirring box, a bearing box, a stirring shaft, an inner magnetic rotor, an outer magnetic rotor and a distance sleeve. The distance sleeve is arranged in the outer magnetic rotor, the inner magnetic rotor is arranged inthe distance sleeve, and the outer magnetic rotor is coupled with the inner magnetic rotor. One end of the outer magnetic rotor is fixedly connected with the output end of the power device, the innermagnetic rotor is fixedly connected with one end of the stirring shaft, the other end of the stirring shaft penetrates through the stirring box, and a movable seal is arranged between the stirring shaft and the stirring box. The bearing box sleeves the stirring shaft, one end of the bearing box is fixedly connected with the open end of the distance sleeve, the other end of the bearing box is fixedly connected with the stirring box, and sealing gaskets are arranged between the stirring box and the bearing box and between the distance sleeve and the bearing box. The sealing effect of the mixingstirrer is reliable, the problem of radioactive waste leakage is completely solved, the life health of staff is guaranteed, and meanwhile the cement curing line mixing stirrer is reasonable in structural design, convenient to dismount and mount and easier to overhaul and maintain.

The invention discloses a loading pressure-flow compensation balance valve. The loading pressure-flow compensation balance valve comprises a balance valve body, wherein a control end cover is installed on the balance valve body, an opening K of the control end cover is used for receiving control pressure from variable-amplitude falling, and is connected with a one-way valve, a first damper, one end of a first screwed plug and a two-position two-way reversing valve through a first filter screen, the one-way valve and the other end of the first damper are connected together and connected to a control cavity of a balance valve through a second damper, one end of the balance valve is connected with a variable-amplitude oil cylinder through a balance valve opening B, the other end of the balance valve is connected with a control valve through a balance valve opening A, spring cavities of the balance valve are connected with one end of a third damper and one end of a fourth damper correspondingly, the other end of the fourth damper and a fifth damper are connected in series and then are connected with one end of a second screwed plug, a spring cavity of the two-position two-way reversingvalve and a balance valve opening Y, and one oil end of the two-position two-way reversing valve is connected with the balance valve opening B. The loading pressure-flow compensation balance valve has the advantages of being simple in product structure, low in cost, good in compensation effect and capable of being adjusted conveniently.

The invention discloses a clamp-connecting globe valve of a corrugated tube, relating to a globe valve. The clamp-connecting globe valve comprises a clamp-connecting valve body; Co-based cemented-carbide sealing ring is welded on the valve body in a resurfacing manner; a double corrugated tube device coated with austenitic titanium stainless steel is detachably and mechanically connected to the lower part of a valve stem; and when a hand-wheel is turned, a lifting poker of the valve stem drives the double corrugated tube device coated with austenitic titanium stainless steel to rise and fall through a valve stem nut. The strong durable double corrugated tube is convenient to detach, a clamp connection is also convenient to detach, a product is simple in structure and reliable in sealing, and zero leakage of the valve stem is guaranteed. The clamp-connecting globe valve has no fluid loss, reduces energy loss and increases safety to the plant equipment. The sealing surface is welded with Co-based cemented carbide in a surfacing manner; the corrugated tube is coated with austenitic titanium stainless steel, thereby being wear-proof and corrosion-poof and having good anti-friction performance and long service life; the clamp-connecting globe valve is applicable to engineering pipelines with clamp-connecting nut externally connecting a conduit under various engineering conditions in petroleum industry, chemistry industry, pharmacy industry, fertilizer industry, electricity industry and the like to cut off or connect the pipeline media, particularly to the engineering of a heat-conducting oil boiler pipeline.