A charged particle accelerator for which assembly work can be simplified is provided, and a method for building the same is provided.

In a vacuum-duct joint-portion 10: a male screw 21 is engraved on an outer peripheral surface of a joint 11; a contact surface 25 to be brought into contact with an annular seal 12 is formed at the end of the inner peripheral surface 22 of the joint 11; a pressing surface 26 for pressing the annular seal 12 toward the contact surface 25 of the joint 11A is formed on the ring 15; an abutting surface 28 that abuts on the ring 15 is formed on the nut 16; and a female screw 27 to be screwed to the male screw 21 of the joint 11A is engraved on the inner peripheral surface of the nut 16.

A seal assembly has a connector body with a first section and a second section, movable relative to one another. The first section and the second section each has an open end configured for receiving the free end of a pipe. The open end of the first and second sections are each configured for sealing engagement with the free end of a respective pipe. The seal assembly is movable between a first condition, in which the second section assumes a retracted position relative to the first section, and a second condition in which the second section assumes an extended position relative to the first section. A seal member is provided for creating a seal between the first section and the second sections in said first and second conditions. First and second adaptors are provided, each for association with a respective one of said first and second sections of the connector body and configured for securing at the free end of a respective pipe. First and second mechanical interlock arrangements are provided, each for association with a respective one of said first and second adaptors, and each configured for driving the respective adaptor in the direction of the connector body.

A seal assembly has a connector body with a first section and a second section, movable relative to one another. The first section and the second section each has an open end configured for receiving the free end of a pipe. The open end of the first and second sections are each configured for sealing engagement with the free end of a respective pipe. The seal assembly is movable between a first condition, in which the second section assumes a retracted position relative to the first section, and a second condition in which the second section assumes an extended position relative to the first section. A seal member is provided for creating a seal between the first section and the second sections in said first and second conditions. First and second adaptors are provided, each for association with a respective one of said first and second sections of the connector body and configured for securing at the free end of a respective pipe. First and second mechanical interlock arrangements are provided, each for association with a respective one of said first and second adaptors, and each configured for driving the respective adaptor in the direction of the connector body.

A quick connect fitting kit includes a chuck having a threaded end. The chuck defines a channel. A collar has a threaded end and a sloped inner surface. The threaded end of the collar is meshable with the threaded end of the chuck to mount the collar to the chuck. A collet has a sloped outer surface. The collet is positioned within the collar such that the sloped outer surface of the collet is positioned on the sloped inner surface of the collar. The collet defines a passage. The passage of the collet is sized for receipt of a pipe. The pipe is in fluid communication with the channel of the chuck when the collet is compressed against the pipe and the collar is mounted to the chuck.

An accessory for a clamp assembly includes a grip element which has a base portion including two opposite end faces, rows of teeth that protrude from the base portion, the teeth being arranged in rows with gaps separating them, wherein each of the teeth has a shape as viewed from one of the end faces which includes a first shape portion which has straight sides each of which extends from the base portion to an end, wherein a junction of each of the straight sides with the base portion has a radius, wherein the straight sides form borders of the gaps. Each of the teeth includes another shape portion that extends inwards, away from the gaps. The ends of the straight sides of the first shape portion and the other shape portion cooperate to grip a pipe.

A pipe fitting includes a fitting body defining an inner surface, an outer surface, a first fitting end, and a second fitting end, the inner surface defining a channel extending from the first fitting end to the second fitting end, a portion of the inner surface defining a tapered region tapering towards the first fitting end; and an engagement assembly comprising a metal grip ring received in the channel, the metal grip ring defining a substantially frustoconical ring body, the ring body defining a diameter that tapers from a first lateral end of the ring body to a second lateral end of the ring body, the engagement assembly configured to slide along the tapered region.

A pipe fitting includes a fitting body defining an inner surface, an outer surface, a first fitting end, and a second fitting end, the inner surface defining a channel extending from the first fitting end to the second fitting end, a portion of the inner surface defining a tapered region tapering towards the first fitting end; and an engagement assembly comprising a metal grip ring received in the channel, the metal grip ring defining a substantially frustoconical ring body, the ring body defining a diameter that tapers from a first lateral end of the ring body to a second lateral end of the ring body, the engagement assembly configured to slide along the tapered region.

Provided is a joint structure with which a pipe can be disconnected without moving the pipe in a longitudinal direction thereof, even if the pipe is not machined. A first sleeve 2 has an inner cavity into which a pipe 100 is inserted, and one end part of the first sleeve comes into contact with a joint body 1. A second sleeve 3 has a hole into which the pipe 100 is inserted, and one end part of the second sleeve comes into contact with the other end part of the first sleeve. A nut 4 covers one end part of the joint body 1, the first sleeve 2, and the second sleeve 3, and the nut is threaded onto the joint body in a state of pressing against the surface of the second sleeve 3 on the side opposite from the first sleeve 2.

Provided is a joint structure with which a pipe can be disconnected without moving the pipe in a longitudinal direction thereof, even if the pipe is not machined. A first sleeve 2 has an inner cavity into which a pipe 100 is inserted, and one end part of the first sleeve comes into contact with a joint body 1. A second sleeve 3 has a hole into which the pipe 100 is inserted, and one end part of the second sleeve comes into contact with the other end part of the first sleeve. A nut 4 covers one end part of the joint body 1, the first sleeve 2, and the second sleeve 3, and the nut is threaded onto the joint body in a state of pressing against the surface of the second sleeve 3 on the side opposite from the first sleeve 2.

A greenhouse comprises a support frame and a spray pipe including pipes and pipe joints, the pipe joint comprises a connecting pipe and two rotary sleeves, the two adjacent pipes are respectively inserted into the connecting pipe, ends of a first pipe are respectively sleeved with a sealing sleeve and a locking sleeve, and each of the ends of the first pipe is further sleeved with a washer. When the rotary sleeve is thread-tightened, the connecting pipe and the locking sleeve are capable of respectively abutting and pressing against two sides of the washer, under abutting and pushing of the rotary sleeve and limiting of the washer, the locking sleeve is capable of grasping the first pipe and forming an axial positioning with the rotary sleeve. An inner edge of an end surface of the connecting pipe has a sealing tapered surface capable of acting on the sealing sleeve.