470results about "Siphons" patented technology

Maintenance kit for a hydraulic system equipped with suction (13) and delivery (14) pipes that define a first connection interface (61), the kit comprising: - at least one pump, said pump having a second connection interface configured for reversible coupling with said first connection interface (61); - a connector element (50) equipped with a third connection interface (51, 52); wherein the third connection interface (51, 52) of said connector element (50) is dimensionally and functionally identical to the second connection interface of said pump, so that said connector element (50) and said pump are mutually interchangeable for coupling with the second connection interface of the hydraulic system, said first, second, and third connection interfaces being configured for coupling by means of reversible fastening means (60) that ensures a hermetic seal of the system under pressure without the need for additional sealing materials.

The invention belongs to the technical field of pump body conveying, and particularly discloses a diaphragm pump conveying device and an organic fluorine intermediate synthesis conveying method.The diaphragm pump conveying device comprises a base, a pump body, a driving part, diaphragm agitating mechanisms, a discharging pipe and a feeding pipe; one end of the driving part penetrates through the interior of the pump body to drive the diaphragm agitating mechanisms to move, the driving part is fixedly installed above the base, the sides, away from each other, of the two diaphragm agitating mechanisms communicate with vertical pipes, the discharging pipe is located above the two vertical pipes, and the feeding pipe is located below the two vertical pipes; the problems that vibration leakage occurs, sealing is not stable, and leakage is difficult to perceive are solved, sealing is reliable, vibration reduction and looseness prevention are achieved, monitoring is timely, and the organic fluorine intermediate conveying device is suitable for safe conveying of organic fluorine intermediates.

The application discloses an erosion-resistant elbow and a preparation method thereof, and specifically comprises the following steps: (1) structure design and blank preparation; (2) preparation of cladding powder; (3) pretreatment; (4) laser cladding treatment; and (5) post-treatment. According to different erosion degrees of different regions of the inner wall of the elbow, different cladding layers are designed, and reasonable elbow structures and cladding materials are designed, so that the erosion-resistant performance of the inner wall of the elbow is maximally improved.

The utility model discloses an air conditioner pipeline buffer assembly combined structure, and relates to the technical field of air conditioner pipelines. The spiral pipe comprises a pipe body and a spiral pipe fitting arranged on one side of the pipe body, and further comprises a support plate arranged at the upper end of the spiral pipe fitting, and a connecting mechanism is arranged on the inner side of the support plate; the connecting clamping ring is arranged at one end of the pipe body; the connecting guide pipe is connected to the end, away from the spiral pipe fitting, of the pipe body. The spiral pipe fitting is designed to be of a spiral structure, meanwhile, the temperature and the flow speed of compressed air flowing at a high speed from an air compressor can be effectively controlled, Z-shaped supports are adopted in the support plate and the connecting mechanism, a multi-face bolt connecting structure is adopted, the structure is more stable, the high tension and compression resistance is achieved, and then the spiral pipe fitting is not prone to falling off. Rubber pads can also be arranged in the arranged connecting clamping rings and can be combined for bearing, on one hand, normal movement of the smooth contact face of the pipe wall is ensured, and on the other hand, a good insulation effect is provided on the premise that shock absorption is ensured.

A branch pipe installation for branching from a vertical pipe comprises a branch connection attached to the vertical pipe having a vertical portion with a reduced cross section forming a nozzle configured to increase the velocity head of water passing through the nozzle, an expansion chamber located directly below the nozzle and having a cross-sectional area larger than the cross-sectional area of ​​the vertical pipe, a branch protruding from the expansion chamber, a floor outlet, and a branch pipe connecting the branch to the floor outlet.

This application provides a method for installing an extra-large drainage system, comprising the following steps: S1. Arranging a sliding device along the installation axis inside the extra-large concrete pipe, and setting a lifting device on the sliding device; S2. Sliding x extra-large drainage systems sequentially to their corresponding positions on the sliding device using the lifting device, controlling the distance between two adjacent extra-large drainage systems to be a, where a is less than b; S3. Continuing to assemble the remaining (n-x) extra-large drainage systems, but controlling the distance between two adjacent extra-large drainage systems to be b; S4. Sliding the second to nth extra-large drainage systems together until the distance between the second and first extra-large drainage systems is b; repeating the above sliding process until the distance between the xth to (x-1th)th extra-large drainage systems is b, thus completing the installation of the extra-large drainage system. This application solves the problem of interference between lifting machinery and pipe cavities due to limited space, and realizes the installation of extra-large drainage systems in confined spaces.

The utility model discloses a quick-screwing connector easy to disassemble, which relates to the technical field of quick-screwing connectors and comprises a connector assembly, a locking and sealing assembly, a locking and sealing assembly and a locking and sealing assembly. The guide assembly is used for guiding the hose; the locking and sealing assembly comprises an adjusting nut which is arranged on the outer side of the second connecting part in a sleeving mode and is in threaded connection with the second connecting part, and the left side of the adjusting nut is rotationally connected with a movable pressing ring through a bearing; an avoiding groove matched with the second connecting part is formed in the right side of the adjusting nut, and a pressing groove is formed in the left side of the movable pressing ring. When the hose is disassembled, the adjusting nut and the movable pressing ring cannot be sleeved outside the hose to be synchronously disassembled, so that the adjusting nut and the movable pressing ring do not need to be recycled independently subsequently, and the disassembling process is more convenient.

The utility model relates to a connecting device for a suspended hood, which comprises a connecting pipe unit, a buffer unit and a joint unit, and the buffer unit is removably arranged in the connecting pipe unit. The connecting rod has the advantages that compared with an existing integrally-formed connecting rod, the connecting pipe unit and the buffering unit are detachably connected, the problem that a new connecting device is replaced due to the fact that the buffering unit is damaged is avoided, only the buffering unit needs to be replaced, and the production cost is greatly reduced; compared with an existing integrally-formed connecting rod, under the same cost, a combination of one connecting pipe unit and a plurality of buffering units and a combination of a plurality of connecting pipe units and a plurality of buffering units can be formed, and the technical effect of a longer service cycle (life cycle) is achieved; in the same service cycle, a combination of one connecting pipe unit and a plurality of buffer units can be formed, and the technical effect of lower production cost is achieved.

The utility model discloses a U-shaped pipe with an anti-deformation function, and belongs to the technical field of U-shaped pipe positioning. The protective device comprises a U-shaped pipe, a protective rack and a pipeline stabilizing mechanism, the pipeline stabilizing mechanism is arranged at the bottom of the U-shaped pipe, the protective rack comprises a vertical plate, the top and the bottom of the vertical plate are connected with a transverse plate, wrapping sleeves are arranged on the two sides of the transverse plate, a connecting mechanism comprises first connecting plates, and the first connecting plates are fixedly connected to the two sides of the front face and the back face of the transverse plate. By arranging the connecting mechanism, the transverse plate and the wrapping sleeve are connected, the U-shaped pipe is fixed through the transverse plate and the wrapping sleeve, the fixing shell can be fixed through the fixing mechanism, the U-shaped pipe is positioned through the fixing shell, the phenomenon that the U-shaped pipe shakes is prevented, the bearing capacity of the U-shaped pipe can be increased when an operator uses the U-shaped pipe for a long time, and the U-shaped pipe is prevented from shaking. The phenomenon that the U-shaped pipe deforms due to the influence of various forces is avoided, and deformation of the U-shaped pipe can be prevented.

To propose a fitting for a secondary pipeline of a double pipe system which can be produced in a simple and low-cost manner and in which it is possible to check the connecting points of the primary and secondary pipelines during assembly.SOLUTION: A fitting includes: two half-shells 2 composed of plastic, wherein each of the half-shells has an integrated heating wire, wherein each heating wire is arranged in the region of a connecting piece 4 and the heating wire has a plurality of meandering windings, wherein each heating wire is arranged in a groove provided for the heating wire in the half-shell; and connecting elements 7 which connect the two half-shells. The fitting has spacer elements arranged on the inner circumference of the half-shells for concentric arrangement of the fitting with respect to a primary pipeline.SELECTED DRAWING: Figure 1

The invention discloses a height-adjustable pipeline suite and a pipeline. The pipeline suite comprises a first half suite and a second half suite, an integrally formed shaft rod is arranged on the outer wall of the first half sleeve piece; a rotatable clamping plate is connected to the shaft rod, and a plurality of saw-tooth-shaped buckles are integrally formed in the middle of the inner side face of the clamping plate; an assembly clamping groove is formed in the outer wall of the connecting position of the second half sleeve piece, and a plurality of buckle grooves are formed in the outer wall of the second half sleeve piece. The outer wall of the second half sleeve piece is attached to the inner wall of the first half sleeve piece to be combined, the buckle protruding strips are clamped into the assembling clamping grooves to be positioned, and the straight edges of the sawtooth-shaped buckles are buckled with the buckle grooves. The pipeline comprises a plurality of pipe bodies, the ends of the adjacent pipe bodies are connected through the pipeline suite, the structural arrangement is reasonable, the connecting effectiveness of the two structures can be improved, the assembling convenience is improved, the buckling position of the two structures can be adjusted according to different sizes, the connecting requirements of the pipe bodies of different sizes can be met, and the practicability is high. And the application range is widened.

The utility model relates to natural gas pipeline technical field, concretely relates to a kind of anti-erosion pipeline elbow, including spherical cavity and erosion-resistant layer, spherical cavity is equipped with fluid inlet pipe and fluid outlet pipe in the radial communication, the included angle of the axis of fluid inlet pipe and fluid outlet pipe is less than 180 °, fluid inlet pipe and fluid outlet pipe are symmetrically arranged in the middle section of spherical cavity, erosion-resistant layer is lined in spherical cavity inner wall, erosion-resistant layer is equipped with first hole and second hole, first hole is communicated with fluid inlet pipe, second hole is communicated with fluid outlet pipe. By being provided with spherical cavity between fluid inlet pipe and fluid outlet pipe with certain included angle state, fluid can flow along the arc inner wall of spherical cavity in turning position, reduce direct scouring to inner wall in turning position, to reduce the degree of erosion, extend the service life of elbow, simultaneously, by being provided with erosion-resistant layer in elbow, the erosion resistance of elbow can be improved, to further extend the service life of elbow.

The utility model relates to a connecting pipe fitting for a copper fluorine direct heating system, which comprises a main body pipeline and a branch pipeline connected with the main body pipeline, the main body pipeline and the branch pipeline are integrally formed, the surface of the main body pipeline and the surface of the branch pipeline are respectively provided with an anti-corrosion coating, and the end parts of the main body pipeline and the branch pipeline are respectively provided with a connecting thread. Reinforcing connecting lug blocks are arranged on the main body pipeline and the branch pipelines. According to the connecting pipe fitting for the copper-fluorine direct heating system, the main body pipeline and the branch pipelines are integrally formed, so that the welding defect is eliminated, and the safety and the reliability are enhanced.

The utility model belongs to the technical field of fluid pipe fittings, and particularly relates to a pneumatic conveying short-radius elbow structure, which is formed by sequentially connecting a first pipe joint, an elbow joint and a second pipe joint, and is characterized in that the first pipe joint and the second pipe joint are both variable-diameter pipe bodies with large ends and small ends, and small-diameter pipe orifices are connected with the elbow joint; a lining is arranged in the bent joint and is of a smooth pipe body structure, the inner diameter of the lining is continuously variable in cross section, the two ends of the lining are reduced towards the middle section along the axis, the diameter r of the middle portion is the smallest, and the eccentric distance a which is 5-10 mm and deviates towards the small-diameter direction is formed between the lining and the axis of an inlet. The bent joint is connected with the first pipe joint and the second pipe joint through flanges or welding. Compared with the prior art, the ceramic elbow has the advantages that the lining layer of the elbow joint is formed by sintering ceramic materials, the ceramic materials have the advantages of being high in hardness, good in abrasion resistance, high in chemical stability and the like, scouring and impacting of fluid and particle materials can be effectively resisted, the service life of the elbow is prolonged, and the problem of local excessive abrasion is solved.

This invention discloses a one-way flow-limiting pipe joint and its manufacturing process, relating to hydraulic components. It aims to solve the problem of dangerous situations caused by excessively rapid depressurization in hydraulic systems. The key technical points are: it includes a joint body, a flow-limiting element, and scrap steel balls. The flow-limiting element is snapped onto the inner wall of the joint body and is shaped like a frustum with both ends connected. All parts of the flow-limiting element have a uniform wall thickness and are coaxially arranged with the joint body. The outer wall of the flow-limiting element has a main oil passage groove communicating with its interior. The small end of the flow-limiting element forms an oil passage opening, and several limiting plates are fixedly connected inside the flow-limiting element. During the depressurization process of the hydraulic system, the flow of hydraulic oil moves the scrap steel balls towards the oil passage opening until the scrap steel balls abut against the inner wall of the flow-limiting element. This causes the scrap steel balls to block the oil passage opening, allowing hydraulic oil to flow only through the main oil passage groove, reducing the flow rate of hydraulic oil during depressurization and improving safety.

The utility model relates to the technical field of pipeline connection, and discloses a drip-proof connecting structure which comprises a connecting pipe, the front end of the connecting pipe is communicated with an elbow, the top of the elbow is in threaded connection with a sleeve, the lower side of the front wall of the sleeve is fixedly connected with a concave plate, a sliding block is arranged in the concave plate, and the sliding block is in threaded connection with the elbow. The top of the sliding block is fixedly connected with a supporting plate, the top end of the supporting plate penetrates through the concave plate and is rotationally connected with a connecting rod, the top of the front side of the concave plate is fixedly connected with a supporting frame, the top of the supporting frame is rotationally connected with a movable plate, and the rear side of the movable plate is fixedly connected with a connecting base. According to the utility model, as the elbow is arranged upwards, residual liquid raw materials in the sleeve cannot drip, the sliding block can drive the supporting plate to move downwards, the supporting plate drives the connecting seat to move through the connecting rod, and the movable plate drives the dirt baffle to cover the top of the sleeve, so that pollutants can be prevented from entering the sleeve.

The utility model relates to a double-shield TBM telescopic hard air pipe, and belongs to the technical field of double-shield TBMs. The front-end hard air pipe is installed on the main machine, the rear-end hard air pipe is installed on the tackle, the butt-joint hard air pipe is telescopically inserted in the front-end hard air pipe, the tail end of the butt-joint hard air pipe is connected with the rear-end hard air pipe, a gap meeting the requirement for mutual swinging during steering is reserved between the butt-joint hard air pipe and the front-end hard air pipe, and the sealing rubber plate is installed at the front end of the butt-joint hard air pipe. The sealing rubber plate is in contact with the inner wall of the front-end hard air pipe to form sealing; the telescopic requirement of the air guide pipe is met through telescopic sleeving of the front-end hard air pipe and the butt-joint hard air pipe, the problems that the service life of the air guide pipe is affected due to deformation, blockage and vibration of the flexible air pipe are solved, and the problem that the flexible air pipe naturally droops is solved due to the fact that the butt-joint hard air pipe is a hard pipe; the turning requirement of the shield tunneling machine is met through the gap between the butt-joint hard air pipe and the front-end hard air pipe, the butt-joint hard air pipe and the front-end hard air pipe are sealed through the sealing rubber plate, the dust removal effect is guaranteed, and the construction efficiency is effectively improved.

The utility model relates to the technical field of double-alloy elbows, in particular to a wear-resistant lining double-alloy elbow which comprises a pipeline main body, an inner layer is arranged inside the pipeline main body, an outer layer is arranged outside the pipeline main body, a wear-resistant lining plate assembly is arranged outside the pipeline main body, flange connecting discs are arranged outside the two ends of the pipeline main body, and the two ends of the pipeline main body are each provided with a wear-resistant lining plate assembly. Wear-resistant rings are arranged in the ends of the two ends of the pipeline main body, each wear-resistant lining plate assembly comprises a supporting block, a wear-resistant block is arranged in each supporting block, and a wear-resistant layer is arranged on one side face of each wear-resistant block, so that the pipeline main body, the inner layer, the outer layer, the wear-resistant lining plate assemblies, the supporting blocks, the wear-resistant blocks, the wear-resistant layers, the flange connecting discs and the wear-resistant rings are arranged in the pipeline main body. The problems that due to the fact that a traditional alloy head is often insufficient in abrasion resistance, the service life of an elbow is short, production cost is increased due to frequent replacement, and production continuity is affected are solved.

The utility model provides a movable pipe joint which comprises a connecting cover and a movable pipe, the movable pipe is a hard pipe, the movable pipe comprises a first pipe part and a second pipe part, the first pipe part is rotatably connected with the connecting cover, a plurality of sealing rings are arranged between the first pipe part and the connecting cover, and the second pipe part is connected with the connecting cover. The first pipe part and the second pipe part are arranged in a non-parallel mode, the connecting cover is provided with a first thread, the second pipe part is provided with a second thread, and the connecting cover is connected with equipment through the first thread and connected with a hose through the second thread, so that the hose can be prevented from being pulled, bent and even deformed in the installation process, and the water passing amount of the hose is prevented from being affected.

The invention relates to a heating hose (3) for conveying a flowable medium, for example, a hot melt adhesive. The heating hose (3) has an angled connector (16), wherein the connector (16) has a first leg (18) and a second leg (19) angled relative to the first leg (18), wherein the connector (16) has a passage channel (17) extending through the legs (18, 19) for conveying the flowable medium through the connector (16), and wherein the connector (16) has a coupling port (20) for establishing a fluid connection between the heating hose (3) and an external device by coupling the external device along a coupling axis (L2) of the coupling port (20).

The application relates to the technical field of water purification equipment, and provides a water outlet pipe structure of a water purifier, which comprises a water outlet pipe body, the water outlet pipe body comprises a first pipe body and a second pipe body which are communicated with each other and perpendicular to each other, water flows through the first pipe body and flows out along the pipe opening of the second pipe body, a rib is connected in the second pipe body, the central axis of the rib is in the same line with the central axis of the first pipe body, the rib extends to one side of the outlet of the second pipe body, and a spacing is left between the rib and the side wall of the second pipe body which is close to one side of the first pipe body. Based on the above, the water outlet pipe of the water purifier is leveled, and the economic burden is reduced.

The utility model discloses a steel-plastic conversion pipe fitting manufactured by extruding and coating a 3PE anti-corrosion steel pipe, which comprises a 3PE anti-corrosion steel pipe fitting and a PE plastic part, the outer wall of the 3PE anti-corrosion steel pipe fitting is provided with a plurality of conical inverted tooth structures, and the inner wall of the PE plastic part is embedded into the conical inverted tooth structures. The 3PE anti-corrosion steel pipe fitting is arranged on the outer surface of the seamless steel pipe body, a plastic-coated locking ring is arranged at the joint of the PE anti-corrosion steel pipe fitting and the 3PE anti-corrosion steel pipe fitting in a sleeved mode to form a steel-plastic conversion pipe fitting, the plastic-coated locking ring comprises a steel locking ring, and a polypropylene coating layer is arranged on the outer portion of the steel locking ring, and the 3PE anti-corrosion layer is arranged on the outer surface of the seamless steel pipe body, so that the 3PE anti-corrosion steel pipe is stable in anti-corrosion performance. And the plastic-coated locking ring is provided with the polypropylene coating layer, so that the plastic-coated locking ring has good corrosion resistance, the corrosion resistance of the steel-plastic conversion pipe fitting is excellent, and the corrosion speed of a pipeline is slowed down.

To provide a powder mixture transport method which can stably pneumatically transport a powder mixture containing inorganic powder and can suppress piping wear.SOLUTION: In a method for pneumatically transporting a powder mixture 3, in which air is flowed inside a pipe 20 containing stainless steel material, and a powder mixture containing inorganic powder is transported by entraining air, an inner surface 20a of the pipe 20 has a hardness higher than that of an outer surface 20c of the pipe 20 through hardening treatment, the hardness of the inner surface 20a of the pipe 20 is at least 10 times that of the hardest inorganic powder contained in the powder mixture 3, the hardest inorganic powder has a hardness of at least 30 HV and an average particle size of at most 200 μm, the flow rate of the air flowing inside the pipe 20 is at least 200 m / min and at most 500 m / min, and the ratio of mass of the powder mixture 3 against the area S of the inside of the pipe 20 in a cross section perpendicular to the axial direction of the pipe 20 is at least 1.0×104 kg / m2 and at most 5.0×104 kg / m2.SELECTED DRAWING: Figure 1

The utility model discloses a high -performance silica gel fuel pipe, including large diameter pipe and small pipe, the outer wall of large diameter pipe is provided with first flange joint, the one end of small pipe is integrated with the second flange joint of first flange joint's adaptation, limiting component is used for preventing the dislocation of first flange joint and second flange joint in the connecting process, prevent the component of falling off, for limiting the axial separation of first flange joint and second flange joint, the utility model limiting component guarantees first flange joint and second flange joint accurate butt joint, make sealing surface close fitting, effectively promote the sealing performance, prevent medium leakage, prevent the component of falling off and locking component cooperation, form double protection, significantly enhance the axial tension resistance and the anti -external force impact ability of large diameter pipe and small pipe connection, avoid accidental uncoupling, the locking of locking component to prevent the component of falling off, ensure that the whole connecting structure keeps stable under complex working condition.

The utility model relates to the technical field of pipeline sealing, and discloses a main machine reactor pipeline sealing device which comprises two pipe bodies, a connecting hose capable of being bent at will is connected between the two pipe bodies, a butt joint is fixedly installed at the end, close to the connecting hose, of each pipe body, and butt joint bases are fixedly installed at the two ends of each connecting hose. A limiting assembly facilitating installation and positioning is arranged between the butt joint and the butt joint base. An adjusting assembly for adjusting the included angle between the two pipe bodies is arranged between the ends of the two pipe bodies. By inserting the sealing inner pipe into the sealing pipe sleeve, the rubber sealing rings can be extruded to deform and embedded in the corresponding annular embedding grooves for sealing, by pinching and screwing the twisting part, the threaded barrel can be driven to rotate on the outer side of the threaded rod, and then the connecting bases on the two sides can be relatively close to or away from each other. Therefore, the two pipe bodies can be driven to relatively deflect, and the included angle between the two pipe bodies can be changed, so that the bending angle can be conveniently adjusted according to actual conditions, and the applicability is improved.

The utility model belongs to the technical field of pipe fittings, and particularly relates to a reinforced compression joint metal pipe fitting and a connecting structure, the metal pipe fitting comprises a pipe fitting body used for being connected with a pipe, at least one end of the pipe fitting body is sequentially provided with a first connecting part and a second connecting part, the first connecting part is provided with at least one sealing ring groove, and the second connecting part is provided with at least one sealing ring groove. A sealing ring is arranged in the sealing ring groove, and a clamping piece is arranged on the second connecting part. An annular groove is formed in the pipe, and the annular groove is matched with the clamping piece to be used for improving the connection firmness of the pipe fitting body and the pipe; the problems that traditional clamping and pressing type connection is poor in sealing performance, and a pipe fitting and a pipe are prone to falling off are solved, and the anti-drawing strength and the sealing performance of pipeline connection are effectively improved.

The utility model provides a water draining mechanism of a wash basin. The water draining mechanism comprises a first pipe body, a second pipe body and an adapter pipe, the first pipe body comprises a water inlet and an access hole which are formed in the two axial ends of the first pipe body, and the water inlet is suitable for communicating with a wash basin. The adapter pipe comprises a first adapter port and a second adapter port which are arranged at the two axial ends of the adapter pipe, the first adapter port is suitable for being communicated with the first pipe body, the adapter pipe is arranged in the radial direction of the first pipe body, and the adapter pipe comprises a deodorization spacer which can seal the first adapter port in an overturning mode. The second pipe body comprises a second water inlet section, a second water outlet section and a second corner section, the second water inlet section is perpendicular to the second water outlet section, and the second water inlet section is rotatably connected to the adapter pipe. The angle between the second pipe body and the first pipe body is adjusted through running fit of the adapter pipe and the second water inlet section, and the water pipe is suitable for complex installation scenes.

The utility model discloses a turning pipe tool type support of a concrete pump pipe, and relates to the technical field of building construction, the turning pipe tool type support comprises a channel steel bottom rod, the upper surface of the channel steel bottom rod is fixedly connected with a supporting assembly, and the inner wall of the middle of the supporting assembly is fixedly connected with two first damping assemblies; the upper surface of the lower left part of the channel steel bottom rod is fixedly connected with a second damping assembly, and the second damping assembly is located on the left sides of the two first damping assemblies. According to the turning pipe tool type bracket of the concrete pump pipe, the channel steel is welded into the fixed bracket, so that the impact generated when the pump pipe conveys concrete can be effectively reduced, and the influence of thrust generated when the concrete pump pipe conveys the concrete on the deviation of a template supporting system and a reinforcing steel bar is greatly reduced; the turnover performance and the convenience are also remarkably improved, so that the operation is simple, the use is convenient, the installation, the disassembly and the transfer are convenient, the wind resistance, the firmness and the stability are realized, the safety coefficient is high, and the installation efficiency and the operation safety of the pump pipe bracket can be effectively improved.

A kit of parts for forming a foreline (112) for coupling a process chamber (108) to a vacuum pumping and / or abatement system (110), the kit comprising: a plurality of foreline sections (122, 124); wherein each foreline section (122, 124) is a tube comprising: a first end portion (122a, 124a) that is substantially straight; a second end portion (122b, 124b) that is substantially straight, opposite the first end portion (122a, 124a); and an intermediate portion (122c, 124c) disposed between the first and second end portions (122a-b, 124a-b) and connected to the first and second end portions (122a-b, 124a-b) by respective bends (122d-e, 124d-e), the first and second end portions (122a-b, 124a-b) being substantially parallel to each other; the intermediate portion (122c, 124c) being inclined with respect to the first and second end portions (122a-b, 124a-b); and the foreline sections (122, 124) being configured to be attached together so as to form a continuous foreline (112).