45results about How to "Achieve multiple seals" patented technology

The invention discloses a vortex shedding flowmeter which comprises a measuring pipe with a flow channel, a connecting rod arranged on the measuring pipe and a vortex street flow converter arranged onthe connecting rod. A detection probe extending into the flow channel is mounted in the measuring pipe; a main installation groove is formed in a wall of the flow channel, an annular vibration reduction rubber ring is arranged in the main installation groove, an annular first installation groove is formed in the inner circumferential wall of the vibration reduction rubber ring, a vortex generatoris arranged in the first installation groove, and an adjusting assembly used for adjusting the vibration reduction grade of the vibration reduction rubber ring is arranged on the vibration reductionrubber ring. The vortex shedding flowmeter can be used for preventing vibration, and therefore accuracy of detection data is ensured.

The invention provides a mechanical follow-up sealing device. The mechanical follow-up sealing device is arranged between a moving component and a fixed component which are oppositely arranged and is used for sealing the moving component and the fixed component. The mechanical follow-up sealing device comprises a driving steel plate connected with the moving component and a follow-up steel plate connected with the fixed component; the follow-up steel plate can swing along with the follow-up steel plate; and the follow-up steel plate is attached to the driving steel plate to form maze sealing with the driving steel plate to seal the moving component and the fixed component. The mechanical follow-up sealing device achieves multiple sealing and multiple following and can effectively reduce the air leakage rate between the moving component and the fixed component.

The invention relates to the technical field of electrical equipment, in particular to a wire harness wall-passing structure and an installation method thereof. The wire harness wall-passing structurecomprises a sleeve, a pouring sealant and at least one sealing plug, the casing pipe is alternately filled with the pouring sealant and the sealing plug in the axis direction of the casing pipe; thesealing plug is provided with at least one first through hole, and a wire harness can penetrate through the pouring sealant and the first through hole of the sealing plug. According to the wire harness wall-passing structure, the casing pipe is filled with the pouring sealant and the sealing plug, so that multi-stage sealing and multi-time sealing of the wire harness are achieved, the sealing performance of the wall-passing structure is greatly improved, and the wire harness wall-passing structure is more suitable for fixing devices such as a high-pressure container.

The invention relates to a power battery pack thermal management system air tightness detection tool and detection system. The detection tool comprises a vent rod, a swelling rod and an elastic swelling part; and the elastic swelling part is arranged on the outer side wall of one end of the vent rod in a sleeving mode, the swelling rod is connected to the outer side wall of the middle of the ventrod in a threaded mode, and one end of the swelling rod is arranged to be close to the elastic swelling part. According to the air tightness detection tool, by arranging the elastic swelling part on the outer side wall of the vent rod, a connection piece can achieve seal connection with a power battery pack management system through the elastic swelling part when being connected to the power battery pack management system, and the detection tool is simple in structure and convenient to operate and maintain.

The invention discloses an underfloor heating floor with a rapid heating function. The underfloor heating floor comprises a substrate, wherein a panel is arranged on the substrate; the substrate comprises a plate body; a cable trough is arranged on the upper surface of the plate body; a heating cable is arranged in the cable trough; and the thickness ratio of the substrate to the panel is 1:(2-3).A production process of the underfloor heating floor comprises the following steps: A, arranging the cable trough on the upper surface of the plate body by utilizing an engraving machine, arranging end head placement ports at two ends of the cable trough, and arranging a cable winding column on the cable trough, so as to obtain the substrate; B, embedding the heating cable in the cable trough andpositioning cable lugs in the end head placement ports; and C, gluing the panel on the substrate, so as to obtain a finished product. The underfloor heating floor disclosed by the invention has the characteristics that the laying operation is convenient and the floor heating speed can be effectively improved.

Disclosed is a novel sealing device of a belt conveyor roller shaft under anti-corrosion and dust-proof special working conditions. The novel sealing device includes a roller and the roller shaft. A left first connecting seat and a right first connecting seat are of the same structure and in bilateral symmetry. The right first connecting seat includes an inner end cover and a first bearing seat which are installed from left to right in sequence in the axial direction. The first bearing seat is provided with a first bearing installation part and a first sealing part from left to right in sequence in the axial direction. The first sealing part is provided with a first magnetorheological fluid curve sealing structure. The left and right ends of the roller shaft are provided with a left secondconnecting seat and a right second connecting seat separately. The right second connecting seat includes a second bearing seat and a bearing end cover. The second bearing seat is provided with a second sealing part and a second bearing installation part from inside to outside in sequence in the axial direction. The second sealing part is provided with a second magnetorheological fluid curve sealing structure. According to the novel sealing device, by using the magnetorheological fluid curve sealing structures, contact sealing is changed into non-contact sealing; the fact that wear of a sealing piece affects the sealing effect of the roller shaft is avoided; and the service life of the roller shaft is prolonged.

The invention provides a high pressure seal examining device which comprises an oil suction pipe, a first cup rubber sleeve, a sealing flange plate, a fixed block and a linking sleeve, two transmission columns, two connecting rods, two limiting arc-shaped blocks, an outer sleeve, a transmission pipe and two limiting sleeve blocks. The transmission pipe is provided with two semi-circumferential spiral slots, two limiting slots are formed in the limiting sleeve block, the rotating transmission columns enter the spiral slots to drive the transmission pipe to rotate, the rotating limiting arc-shaped blocks enter into the limiting slot in one limiting sleeve block to rotate and slide out from the limiting slot on the other limiting sleeve block to fix the transmission pipe. The high pressure seal examining device also comprises a connecting pipe and an inner sleeve. The inner sleeve is provided with a first rinsing slot, and the outer sleeve is provided with a second rinsing slot. The highpressure seal examining device also comprises a rubber sleeve supporting rack. A second cup rubber sleeve is fixedly mounted on the rubber sleeve supporting rack. The high pressure seal examining device is simple in structure and relatively low in cost.

The invention provides a diagnostic connector for a motorcycle. The problem of weak sealing performance of an existing diagnostic connector for a motorcycle is solved. The diagnostic connector comprises a sheath which is internally provided with a receiving groove for placing wire connection terminals, a front seal, a back seal, a first pressing block for pressing the front seal, and a second pressing block for pressing the back seal. A first pressing piece is provided with a plurality of wire connected grooves through which the wire connection terminals go. The front seal is provided with wire connection holes through which the wire connection terminals go. The sheath is also provided with a dust cover which covers the receiving groove and is detachably connected with a protection cover. The diagnostic connector for a motorcycle has the advantages of simple structure, convenience in use, good sealing performance and can be adapted to a harsh use environment.

The invention discloses a sectional type heat exchange tube assembling device. The sectional type heat exchange tube assembling device comprises tube plates, baffle plates, heat exchange tubes, a clamping convex short tube and an internal thread short tube, wherein the baffle plates at least comprise a baffle plate A, a baffle plate B and a baffle plate C; the heat exchange tubes at least comprisea middle section tube, a front section tube and a rear section tube, and the front section tube and the rear section tube are fixedly connected with the tube plate; and the clamping convex short tubecomprises a front external thread section, a rear external thread section and a middle section connected with the front external thread section and the rear external thread section into a whole, andthe front external thread section, the rear external thread section and the middle section are all two semicircular pipes. According to the sectional type heat exchange tube assembling device, multi-section type assembly of the heat exchange tubes can be achieved, the problem that tube penetrating is strenuous is solved, meanwhile, the heat exchange tubes with expansion joints can be detached oneby one for deep cleaning during cleaning, meanwhile, a part of the corroded heat exchange tubes can be detached for replacement, the heat exchange tubes can continue to be prolonged, and the heat exchange efficiency is improved.

The invention provides a cross universal joint. The cross universal joint comprises a universal joint body, a bearing outer ring, a roller pin, an outer oil seal, an inner oil seal, a compensation oil seal, a pressing threaded sleeve and an oil storage cavity, wherein the outer oil seal is installed on a universal joint head, the inner oil seal is installed on the inner side of the bearing outer ring, the compensation oil seal is arranged between the outer oil seal and the inner oil seal, one side of the outer oil seal abuts against a first stepped groove in the universal joint head, the other side of the outer oil seal abuts against the compensation oil seal, the pressing threaded sleeve is in threaded connection with the bearing outer ring and used for driving the compensation oil seal to press against the outer oil seal, an outer ring of the inner oil seal is arranged in a second stepped groove in the bearing outer ring in a clamped mode, an inner ring of the inner oil seal abuts against the outer wall of the universal joint head, the oil storage cavity is formed in the universal joint body, and an oil guide channel communicating with the oil storage cavity is formed in the universal joint head and used for guiding lubricating oil into the roller pin in the bearing outer ring. Through cooperation of the outer oil seal, the inner oil seal and the compensation oil seal, multiple sealing is achieved, dust can be effectively prevented, and leakage of internal lubricating grease is avoided.

A complete set of high-safety waterproof low-voltage switchgear, including a switchgear door panel, a switchgear cabinet body and a switchgear door frame, a first seal is provided on the switchgear door frame, a second seal is provided on the switchgear door panel; the first seal The first rubber strip made of rubber elastic body and the second rubber strip made of rubber elastic body are arranged on the part; the third rubber strip made of rubber elastic body is arranged on the second sealing part; The observation window includes a glass plate and a reinforcement plate from the inside to the outside. There are multiple observation holes on the reinforcement plate. Three different sealing strips are used to cooperate with each other to achieve multiple seals and effectively ensure its sealing and waterproof performance. The special observation window design uses a reinforced guard plate outside the glass, and adopts a number of regular hexagonal observation holes to enhance the protection performance and allow normal observation at the same time.

The invention relates to the technical field of ball valve sealing devices and in particular to a dual-material multi-protection sealing mechanism of a ball valve. The dual-material multi-protection sealing mechanism of the ball valve comprises an annular sealing valve seat and a soft sealing assembly mounted on the annular sealing valve seat. The soft sealing assembly is provided with a soft sealing surface for matching with a spherical surface of the ball valve. The dual-material multi-protection sealing mechanism of the ball valve is characterized in that at least one first rigid sealing ring is mounted on the annular sealing valve seat. Due to implementation of the above technical solution, the dual-material multi-protection sealing mechanism of the ball valve realizes dual-material multi-seal of the ball valve by means of independent designs of the soft sealing assembly and the first rigid sealing ring. By means of complementary effects, the reliability of seal for coping with the case of a medium containing small particles is improved. Each seal has independent integrity, thereby enhancing the replaceability of the present invention. Besides, a first dusting scraper adjacent to a first rigid sealing surface is capable of effectively removing scale and particles covering the spherical surface of the ball valve to ensure formation of an effective sliding seal pair on the soft sealing surface, the rigid sealing surface and the spherical surface of the ball valve, thus improving the sealing property and prolonging the service life.

A multiple-sealing full-welding pipeline ball valve comprises a valve ball (5), a valve body (7) and a valve rod (10), wherein the valve body (7) adopts a spherical structure and is formed through hot forging of a left valve body and a right valve body, and the middle is formed through singe-welding-seam welding; supporting legs (3) are arranged at the lower part of the valve body (7); the valve ball (5) adopts a supporting type and is supported by an upper supporting seat and a lower supporting seat; multiple-sealing structures are arranged on a valve seat; first sealing is realized at a soft seal (A-2) before the valve, and second sealing is realized at a soft seal (A-1); and a pre-tightening spring (A-4) is preset at the valve seat.

The invention provides a cooling tower. The cooling tower comprises a cooling tower main body, an enclosure unit and first sealing pieces, wherein the cooling tower main body comprises a plurality of purline structures, and the purline structures are annularly distributed and extend along the height direction; the enclosure unit is annularly arranged along the cooling tower main body and at least distributed on the inner side of the cooling tower main body, the enclosure unit comprises a plurality of enclosure panels, and the adjacent enclosure panels are fixed in the circumferential direction and are assembled and connected layer by layer in the height direction; and the first sealing pieces are arranged on the sides, back on to the cooling tower main body, of the adjacent enclosure panels, and are suitable for covering and sealing gaps between profiling panels. By arranging the first sealing pieces, the enclosure panels are supplemented and sealed, the cooling tower main body is prevented from being rusted, the service life and the enclosure period of the cooling tower are prolonged, the enclosure panels can also be reinforced, the strength of the enclosure panels is improved, and the stability of the sealing performance of the cooling tower is guaranteed.

The invention relates to a sealing, locking and grounding structure at a wire inlet of a non-explosion-proof motor junction box. The sealing, locking and grounding structure mainly comprises a cable,an elastic sealing ring, a clamping groove, a junction box seat, a junction hopper and the like. Reserved holes are formed in the elastic sealing rings, the elastic sealing rings are installed in theclamping grooves, the clamping grooves are embedded in reserved spigots of the junction box base, the junction hopper is screwed on the junction box base, and a cable is connected with the wiring terminals in the junction box base through the junction hopper and the elastic sealing rings. According to the product, the original junction box mold is not changed, and on the premise that the sealing,locking and armored grounding functions of an original cable waterproof joint are ensured, the elastic sealing ring installed inside the junction box and the clamping device installed outside the junction box are combined to achieve the structure of the sealing, locking and grounding functions. The sealing, locking and grounding structure is low in production cost and high in universality, can meet the requirement for cable inlet of rubber jackets, steel cloth, armored rubber jackets and armored steel cloth cables at the same time through one structure, improves the working efficiency, and ishigh in operability.