CN216925979U - Large-scale compressor hydrostatic test device - Google Patents

Abstract

The utility model discloses a hydraulic pressure test device for a large compressor, which comprises: an end cap; the first flange is arranged on one side of the end cover; the second flange is arranged on the other side of the end cover; the first fastening piece is arranged on one side, far away from the end cover, of the first flange; the second fastening piece is arranged on one side, far away from the end cover, of the second flange; the connecting piece axially penetrates through the first flange, the end cover and the second flange, one end of the connecting piece is connected with the first fastening piece, and the other end of the connecting piece is connected with the second fastening piece; and a water inlet structure is arranged on the connecting piece and used for injecting water into a cavity defined by the first flange, the end cover and the second flange. According to the utility model, the large-scale pressure test structure matched with the ethylene compressor is arranged, so that the tightness of the large-scale compressor test tool is ensured, the problem of the hydraulic test of the large-scale compressor is solved, and the qualification of the hydraulic test is ensured.

Description

Large-scale compressor hydrostatic test device

Technical Field

The utility model relates to a compressor, in particular to a hydraulic test device for a large compressor.

Background

The shell and the end cover of the compressor are required to be subjected to hydrostatic test after being processed, all openings of the shell and the end cover are required to be sealed by flanges during the hydrostatic test to form a sealed cavity, water is injected into the cavity according to a set pressure value, the pressure is maintained for 30 minutes, no leakage exists between the hydrostatic test tool and the shell or the end cover, and the hydrostatic test is qualified. The size, weight and specification of the ethylene compressor shell and the end cover are large, the pressure of a hydrostatic test is relatively high, and the conventional hydrostatic test tool cannot meet the requirement of a large-shell high-pressure hydrostatic test.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a hydraulic pressure test device for a large-scale compressor.

Specifically, the method comprises the following technical scheme:

a hydraulic test device for a large compressor comprises:

an end cap;

a first flange disposed at one side of the end cap;

the second flange is arranged on the other side of the end cover;

the first fastening piece is arranged on one side, far away from the end cover, of the first flange;

the second fastening piece is arranged on one side, far away from the end cover, of the second flange;

the connecting piece axially penetrates through the first flange, the end cover and the second flange, one end of the connecting piece is connected with the first fastening piece, and the other end of the connecting piece is connected with the second fastening piece;

and a water inlet structure is arranged on the connecting piece and used for injecting water into a cavity defined by the first flange, the end cover and the second flange.

Optionally, the water inlet structure includes a water inlet channel and a plurality of water outlet channels, and the water outlet channels communicate the water inlet channel and the cavity;

the water inlet channel comprises a water inlet hole, the water inlet hole is formed in the end face of one end, connected with the first fastening piece, of the connecting piece, and the water inlet channel extends from the water inlet hole to be communicated with the water outlet channel along the axial direction of the connecting piece;

the outlet channel includes the apopore, apopore circumference equipartition is in on the outer wall of connecting piece, the outlet channel certainly the apopore is followed the radial extension of connecting piece extend to with the inlet channel intercommunication.

Optionally, a hoisting hole is formed in the connecting piece;

the hoisting hole is formed in the end face of one end, connected with the second fastening piece, of the connecting piece, and extends along the axis direction of the connecting piece.

Optionally, the first fastener or the second fastener comprises a fastening nut and a fastening bolt;

a first threaded hole is formed in the center of the fastening nut, an external thread is arranged on the connecting piece, and the fastening nut is in threaded connection with the connecting piece;

and a plurality of second threaded holes are symmetrically arranged on two sides of the first threaded hole by taking the plane of the central axis of the fastening nut as a symmetrical plane, and the fastening bolt penetrates through the second threaded holes to be abutted against the first flange or the second flange.

Optionally, the test device further comprises a sealing structure;

the seal structure includes a first seal and a second seal;

when the first seal and the second seal are disposed between the first fastening member and the first flange in a stacked manner in the axial direction of the fastening nut, the first seal is disposed close to the first fastening member, the second seal is disposed close to the first flange, and the fastening bolt abuts against the first seal;

when the first seal and the second seal are arranged between the second fastening member and the second flange in a stacked manner in the axial direction of the fastening nut, the first seal is arranged close to the second fastening member, the second seal is arranged close to the second flange, and the fastening bolt abuts against the first seal;

the diameter of the second seal is greater than the diameter of the first seal, and the thickness of the second seal is less than the thickness of the first seal.

Optionally, the testing device further comprises a supporting member for supporting the end cover to be placed in a horizontal state;

the support piece is arranged at one end of the connecting piece and is opposite to the water inlet structure.

Optionally, the testing apparatus further comprises a housing;

the third flanges are arranged on the ports on the two sides of the shell;

and the hoisting structure is arranged on the outer edge of the third flange and used for vertically hoisting the third flange to the installation position in the machine shell.

Optionally, the hoisting structure includes a fixing plate and a lifting lug, and the lifting lug is arranged in the middle of the fixing plate;

the fixing plate and the lifting lug are integrally formed, and the fixing plate is fixedly connected with the third flange.

Optionally, the outer edge of the third flange is of a stepped structure and comprises a high-step part and a low-step part, and the lateral ring surface of the high-step part is connected with the outer ring surface of the low-step part;

at least two annular first sealing grooves are formed in the side ring surface of the high-step portion, and the groove bottoms of the first sealing grooves extend along the axial direction of the third flange;

and the outer ring surface of the low-step part is provided with at least one annular second sealing groove, and the groove bottom of the second sealing groove extends along the radial direction of the third flange.

Optionally, the testing device further comprises a tension member;

the third flange is arranged on the inner side of the port of the shell, the tensioning piece is arranged on the outer side of the port of the shell and spans the port of the shell, two ends of the tensioning piece are respectively connected with the shell, and the middle of the tensioning piece is fixedly connected with the third flange.

The technical scheme provided by the embodiment of the utility model has the beneficial effects that at least:

according to the utility model, the large-scale pressure test structure matched with the ethylene compressor is arranged, so that the tightness of the large-scale compressor test tool is ensured, the problem of the hydraulic test of the large-scale compressor is solved, and the qualification of the hydraulic test is ensured. Meanwhile, the water inlet structure is arranged on the connecting piece in the water pressure test device, so that the water inlet mode of the end cover water pressure test is an axial water inlet mode, an air cavity is not easily generated in the axial water inlet mode, and the stability of the water pressure test is ensured.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of an end cap hydrostatic test unit according to the present invention;

FIG. 2 is a schematic view of a connector structure according to the present invention;

FIG. 3 is a schematic view of a fastening nut according to the present invention;

FIG. 4 is a schematic view of a first seal configuration of the present invention;

FIG. 5 is a schematic view of a second seal configuration of the present invention;

FIG. 6 is a schematic view of a first flange structure according to the present invention;

FIG. 7 is a schematic view of a second flange according to the present invention;

FIG. 8 is a schematic view of a fourth flange according to the present invention;

FIG. 9 is a schematic view of a support tray according to the present invention;

FIG. 10 is a schematic structural diagram of a casing hydrostatic test apparatus according to the present invention;

FIG. 11 is a schematic structural view of a third flange according to the present invention;

FIG. 12 is a schematic view of a third flange and lifting structure of the present invention;

FIG. 13 is a schematic view of the hoisting structure of the present invention;

FIG. 14 is a schematic view of a cap nut according to the present invention;

FIG. 15 is a schematic structural view of the complete machine hydrostatic test apparatus of the present invention.

The reference numerals in the figures are denoted respectively by:

100-end cap; 200-a housing; 201-tuyere; 1-a connector; 1-1-a water inlet structure; 1-1 a-a water inlet channel; 1-1 a' -water inlet hole; 1-1 b-a water outlet channel; 1-1 b' -water outlet; 1-2-hoisting holes; 2-a first fastener; 2-1-fastening a nut; 2-1 a-a first threaded hole; 2-1 b-a second threaded hole; 2-1 c-force application groove; 2-1 d-a force application hole; 2' -a second fastener; 3-a first seal; 4-a second seal; 5-a first flange; 5-1, 7-1-mounting holes; 5-2-a first seal ring groove; 6-first sealing ring; 7-a second flange; 7-2-a second seal ring groove; 8-a second sealing ring; 9-a third sealing ring; 10-a fifth flange; 11-rubber ring; 12-cap nut; 12-1-extended threads; 12-2-seal groove; 13-a fourth flange; 13-1-threaded through hole; 13-2-shaft hole; 14-a gasket; 15-a stud; 16-a support; 16-1-square shaft hole; 16-2-reinforcement holes; 17-a third flange; 17-1-low order; 17-2-high order section; 18-a tensioning member; 19-hoisting structure; 19-1-lifting lug; 19-2-fixation plate; 19-3-gasket; 19-4-stud or bolt

With the above figures, certain embodiments of the utility model have been illustrated and described in more detail below. The drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it by those skilled in the art with reference to specific embodiments.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Before the embodiments of the present invention are described in further detail, terms of orientation in the embodiments of the present invention, such as "upper", "lower", and "side", are not intended to limit the scope of the present invention, based on the orientation shown in fig. 1.

In order to make the technical solutions and advantages of the present invention clearer, the following will describe embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1, the present embodiment provides a hydraulic test apparatus for a large compressor, including: an end cap 100; a first flange 5 provided at one side of the end cap 100; a second flange 7 provided at the other side of the end cap 100; the first fastening piece 2 is arranged on one side, far away from the end cover 100, of the first flange 5; a second fastening member 2' arranged on the side of the second flange 7 remote from the end cap 100; the connecting piece 1 axially penetrates through the first flange 5, the end cover 100 and the second flange 7, one end of the connecting piece 1 is connected with the first fastening piece 2, and the other end of the connecting piece 1 is connected with the second fastening piece 2'; the connecting piece 1 is provided with a water inlet structure 1-1 for injecting water into a cavity surrounded by the first flange 5, the end cover 100 and the second flange 7.

Further, as shown in fig. 1 and fig. 6, the first flange 5 is a flange without a seam allowance, a plurality of mounting holes 5-1 are circumferentially arranged near the edge of the first flange 5, and the first flange 5 is connected to a port (shown in fig. 15) of the end cover 100 located outside the housing 200 through the mounting holes 5-1. As shown in figure 1, a first sealing ring groove 5-2 is formed in the position, close to the edge, of the first flange 5, the first sealing ring groove 5-2 is formed in the position, where the first flange 5 is connected with the end cover 100, the groove bottom of the first sealing ring groove 5-2 extends along the axial direction of the first flange 5, and the first sealing ring 6 is arranged in the first sealing ring groove 5-2, so that the air tightness of the assembly of the first flange 5 and the end cover 100 is guaranteed. At least one first seal ring groove 5-2 is provided.

Further, as shown in fig. 1 and 7, the second flange 7 is a flange with a seam allowance, a plurality of mounting holes 7-1 are circumferentially arranged at positions close to the edge of the second flange 7, and the second flange 7 is connected with a port (shown in fig. 15) of the end cover 100 located inside the housing 200 through the mounting holes 7-1. As shown in FIG. 1, a second sealing ring groove 7-2 is formed in the position, close to the edge, of the second flange 7, the second sealing ring groove 7-2 is formed in the position, where the second flange 7 is connected with the end cover 100, the groove bottom of the second sealing ring groove 7-2 extends along the axial direction of the second flange 7, and the second sealing ring 8 is arranged in the second sealing ring groove 7-2, so that the air tightness of the assembly of the second flange 7 and the end cover 100 is guaranteed. At least one of the second seal ring grooves 7-2 is provided.

Further, as shown in fig. 6 and 7, shaft holes are formed in the middle of the first flange 5 and the second flange 7, a plurality of third sealing ring grooves are formed in the wall surface of each shaft hole, the groove bottoms of the third sealing ring grooves extend in the radial direction of the first flange 5 or the second flange 7, and the third sealing rings 9 are arranged in the third sealing ring grooves and attached to the connecting pieces 1, so that the air tightness between the first flange 5 and the connecting pieces 1 and the air tightness between the second flange 7 and the connecting pieces 5 are guaranteed. In this embodiment, the third sealing ring 9 is a sealing rubber rope.

Further, the arrangement of the first fastening piece 2 further enhances the air tightness between the first flange 5 and the end cover 100, so that the pressure testing device of the end cover 100 has stronger pressure bearing capacity;

further, the arrangement of the second fastening piece 2' further enhances the air tightness between the second flange 7 and the end cover 100, so that the pressure testing device of the end cover 100 has stronger pressure bearing capacity;

further, after the connecting piece 1 is fastened by the first fastening piece 2 and the second fastening piece 2', the first flange 5 and the second flange 7 are subjected to pressure from two sides of the connecting piece 1 to the center of the connecting piece 1 along the axis direction of the connecting piece 1, so that the air sealing and connecting strength between the first flange 5 and the second flange 7 and the end cover 100 is enhanced, and the end cover pressure testing device can bear larger testing pressure.

Furthermore, the water inlet structure on the connecting piece 1 enables the water inlet mode in the end cover pressure testing device to be an axial water inlet mode, the water inlet process is more uniform and stable, an air cavity is not easy to generate in the end cover pressure testing cavity, and the safety and the stability of the end cover pressure testing device are guaranteed.

Further, the size of first flange 5, second flange 7, first fastener 2 and second fastener 2 'all processes according to the end cover size of large-scale compressor, compares with current pressure testing structure, and the size of first flange 5, second flange 7, first fastener 2 and second fastener 2' is bigger, and thickness is more back, and intensity is higher, and the concrete thickness of each structure all calculates the income through mechanics, can bear higher test pressure, has guaranteed the qualification of pressure testing.

According to the utility model, the large-scale pressure test structure matched with the ethylene compressor is arranged, so that the tightness of the large-scale compressor test tool is ensured, the problem of the hydraulic test of the large-scale compressor is solved, and the qualification of the hydraulic test is ensured. Meanwhile, the water inlet structure is arranged on the connecting piece in the water pressure test device, so that the water inlet mode of the end cover water pressure test is an axial water inlet mode, an air cavity is not easily generated in the axial water inlet mode, and the stability of the water pressure test is ensured.

As shown in FIG. 2, the water inlet structure 1-1 comprises a water inlet channel 1-1a and a plurality of water outlet channels 1-1b, wherein the water inlet channel 1-1a and the cavity are communicated through the plurality of water outlet channels 1-1 b; the water inlet channel 1-1a comprises a water inlet hole 1-1a ', the water inlet hole 1-1a ' is arranged on the end face of one end of the connecting piece 1 connected with the first fastening piece 2, and the water inlet channel 1-1a extends from the position of the water inlet hole 1-1a ' along the axial direction of the connecting piece 1 to be communicated with the water outlet channel 1-1 b; the water outlet channel 1-1b comprises water outlet holes 1-1b ', the water outlet holes 1-1b ' are circumferentially and uniformly distributed on the outer wall surface of the connecting piece 1, and the water outlet channel 1-1b extends from the water outlet holes 1-1b ' along the radial direction of the connecting piece 1 to be communicated with the water inlet channel 1-1 a.

Furthermore, a hoisting hole 1-2 is arranged on the connecting piece 1; the hoisting holes 1-2 are arranged on the end face of one end of the connecting piece 1 connected with the second fastening piece 2', and the hoisting holes 1-2 extend along the axial direction of the connecting piece 1.

Further, referring to fig. 2 and 15, in the complete machine hydraulic test, in order to verify the pressure tightness of the connection between the end cover 100 and the housing 200, an end cover pressure testing device is assembled with the housing 200. Due to the arrangement of the hoisting holes 1-2, the end cover pressure testing device is conveniently hoisted into the shell 200, and the assembly efficiency of the complete machine hydraulic pressure testing device is improved.

Further, as shown in fig. 1 and 2, the water inlet structure 1-2 is disposed at one end of the connecting member 1 connected to the first fastening member 2, and the lifting hole 1-2 is disposed at one end of the connecting member 1 connected to the second fastening member 2'.

As shown in fig. 1 and 3 in combination, the first fastening member 2 or the second fastening member 2' includes a fastening nut 2-1 and a fastening bolt 2-2 (not shown in the drawings); a first threaded hole 2-1a is formed in the center of the fastening nut 2-1, an external thread is formed on the connecting piece 1, and the fastening nut 2-1 is in threaded connection with the connecting piece 1; a plurality of second threaded holes 2-1b are symmetrically formed in two sides of the first threaded hole 2-1a by taking a plane where a central axis of the fastening nut 2-1 is located as a symmetry plane, and the fastening bolt 2-2 penetrates through the second threaded holes 2-1b to be abutted to the first flange 5 or the second flange 7.

Furthermore, in the embodiment, the fastening nut 2-1 is a super nut, and compared with common nuts, the super nut is larger in size, thicker in thickness, higher in strength, higher in fastening force to a hydraulic test device for the end cap and capable of improving the strength of the hydraulic test device, and qualified in hydraulic test is guaranteed.

Further, the fastening force of the first fastening member 2 or the second fastening member 2' to the device is applied to the device by screwing the first screw hole 2-1a to the coupling member 1, and by abutting the second screw hole 2-1b to the first flange 5 or the second flange 7. The strength of the pressure testing device is ensured.

Furthermore, due to the fact that the size of the fastening nut 2-1 is large, when external force is applied to the fastening nut 2-1, tools need to be used, the fastening nut 2-1 is provided with the force application groove 2-1c and the force application hole 2-1d, the tools can be placed conveniently, a large amount of manpower is saved, and user experience is good. Moreover, force application torque can be increased for the fastening nut 2-1 through the force application grooves 2-1c and the force application holes 2-1d, fastening force is improved, and air tightness of the device is guaranteed.

Referring to FIGS. 1, 4 and 5, the test device further includes a sealing structure; the sealing structure comprises a first sealing member 3 and a second sealing member 4; when the first sealing member 3 and the second sealing member 4 are arranged between the first fastening member 2 and the first flange 5 in a stacked manner along the axial direction of the fastening nut 2-1, the first sealing member 3 is arranged close to the first fastening member 2, the second sealing member 4 is arranged close to the first flange 5, and the fastening bolt 2-2 abuts against the first sealing member 3; when the first seal member 3 and the second seal member 4 are arranged between the second fastening member 2 'and the second flange 7 in a stacked manner in the axial direction of the fastening nut 2-1, the first seal member 3 is arranged close to the second fastening member 2', the second seal member 4 is arranged close to the second flange 7, and the fastening bolt 2-2 abuts against the first seal member 3; the diameter of the second seal 4 is larger than the diameter of the first seal 3 and the thickness of the second seal 4 is smaller than the thickness of the first seal 3.

Further, first sealing member 3 and second sealing member 4 are the gasket, compare with current gasket structure, first sealing member 3 and second sealing member 4's size is bigger, and the size has increased fastening nut 2-1 greatly and has closed the area, and thickness is thicker, and the concrete thickness of each structure all calculates the result through mechanics, and intensity is bigger, and with the pressure testing device phase-match of large-scale compressor, has guaranteed pressure testing device's gas tightness, has guaranteed hydrostatic test's qualification.

Further, the second sealing element 4 is larger in size and thinner than the first sealing element 3, the force bearing area of the first flange 5 or the second flange 7 is increased, and the force acting on the first flange 5 or the second flange 7 is more uniformly distributed, so that larger force can be applied to the first fastening element 2 or the second fastening element 2', and the overall strength and air tightness of the device are improved.

Referring to fig. 1 and 9, the testing apparatus further includes a support member 16 for supporting the end cap 100 in a horizontal position; the supporting member 100 is provided at one end of the connecting member 1 to be opposite to the water inlet structure 1-1.

Further, end cover hydrostatic test device need be the level with the whole device and place, guarantees end cover test device's stability in the experimentation. The support piece 16 provides a supporting force on a horizontal plane for the end cover test device, and the stability of the test device in the hydraulic test process is guaranteed.

Furthermore, the supporting piece 16 is connected with one end of the connecting piece 1 provided with the hoisting hole 1-2, so that the smoothness of the water inlet structure 1-1 is ensured.

Furthermore, a square shaft hole 16-1 is formed in the central axis of the supporting piece 16, shaft ends on two sides of the connecting piece 1 are square (as shown in fig. 2), the limiting of circumferential rotation of the connecting piece 1 can be formed in shape through assembly between the square shaft and the square hole, in order to further limit shaking between the connecting piece 1 and the supporting piece 16 after connection, reinforcing holes 16-2 are respectively formed in four corners of the square shaft hole 16-1, the reinforcing holes 16-2 are communicated with the square shaft hole 16-1, and connection between the connecting piece 1 and the supporting piece 16 is reinforced through screws arranged in the reinforcing holes 16-2.

Referring to fig. 1 and 8, an air inlet and an air outlet are formed in a compressor end cover 100, the air inlet and the air outlet need to be sealed during a water pressure test of the end cover, the embodiment further includes a fourth flange 13, the fourth flange 13 is a square flange, threaded through holes 13-1 are formed in four corners of the flange respectively, the fourth flange 13 is fixedly connected with the end cover 100 through studs 15, an axle hole 13-2 is formed in a central axis of the square flange 13, the axle hole 13-2 is an axial through hole and comprises a large-axis-diameter section and a small-axis-diameter section, a joint between the large-axis-diameter section and the small-axis-diameter section is conical, and threads are circumferentially formed in a circumferential side wall of the large-axis-diameter section. The fourth flange 13 is arranged on the air inlet or/and the air outlet, so that the air inlet and/or the air outlet are/is sealed, and the integral sealing of the end cover pressure testing device is realized. A measuring instrument is arranged in a shaft hole 13-2 of the square flange 13, optionally, the measuring instrument is a pressure gauge, and the pressure in the hydraulic test process of the end cover 100 is detected in real time.

Further, a gasket 14 is arranged between the fourth flange 13 and the end cover 100, so that the holding area between the fourth flange 13 and the end cover 100 is increased, and the holding firmness of the bolts 15 is enhanced. The gasket 14 is an asbestos gasket.

Optionally, the air inlet or the air outlet of the end cover 100 may be closed by a fifth flange 10, the fifth flange 10 is fastened to the end cover 100 by a stud 15, and a rubber ring 11 is disposed between the fifth flange 10 and the end cover 100 for sealing. The fifth flange 10 is a conventional flange.

As shown in fig. 10, the test apparatus further includes a cabinet 200; third flanges 17 provided on both side ports of the cabinet 200; and the hoisting structure 19 is installed on the outer edge of the third flange 17 and used for vertically hoisting the third flange 17 to the installation position in the machine shell 200.

Further, when the third flange 17 is connected to the both side ports of the housing 100, the third flange 17 is positioned inside the housing 200, and the third flange 17 and the housing 200 are connected by the cap nut 12 shown in fig. 14. The novel cap-shaped nut 12 is stronger in universality, better in fastening effect, capable of bearing larger pressure and increasing a sealing defense line for pressure testing.

Further, when the cap nut 12 is connected by using a stud, the cap nut is pre-tightened by using a low-pressure pump, and then pre-tightened by using a high-pressure pump 2200 bar.

Referring to fig. 10, 12 and 13, the hoisting structure 19 includes a fixed plate 19-2 and a lifting lug 19-1, the lifting lug 19-1 is disposed in the middle of the fixed plate 19-2; the fixed plate 19-2 and the lifting lug 19-1 are integrally formed, and the fixed plate 19-2 is fixedly connected with the third flange 17.

Further, the hoisting structure 19 can be specifically designed according to parameters such as the outer edge shape and the weight of the flange, so that the hoisting structure 19 meets hoisting requirements. Alternatively, the shape of the fixing plate 19-2 can be designed according to actual requirements.

Further, the fixing plate 19-2 and the third flange 17 are connected by bolts or studs 19-4, and washers 19-3 may be provided at the connection between the bolts or studs 19-4 and the third flange 17 in order to enhance the strength of the connection.

Referring to fig. 10 and 11, the outer edge of the third flange 17 has a stepped structure, including a high step portion 17-2 and a low step portion 17-1, and the side ring surface of the high step portion 17-2 is connected to the outer ring surface of the low step portion 17-1; at least two annular first sealing grooves are arranged on the side ring surface of the high-step part 17-2, and the groove bottoms of the first sealing grooves extend along the axial direction of the third flange 17; at least one annular second sealing groove is arranged on the outer annular surface of the low-step part 17-1, and the groove bottom of the second sealing groove extends along the radial direction of the third flange 17.

Further, the structure of the first sealing groove is shown as I in fig. 11, and the structure of the second sealing groove is shown as II in fig. 11. In this embodiment, the rubber rope is arranged in the first sealing groove and the second sealing groove to seal the direct connection between the third flange 17 and the casing 200, so that the airtightness of the pressure test of the casing is improved, and the qualification of the hydraulic test is ensured.

As shown in fig. 10, the trial further includes a tension member 18; the third flange 17 is arranged at the inner side of the port of the casing 200, the tension member 18 is arranged at the outer side of the port of the casing 200 and spans the port of the casing 200, two ends of the tension member 18 are respectively connected with the casing 200, and the middle part of the tension member 18 is fixedly connected with the third flange 17.

Further, because the third flange 17 is large in size, after the thickness is obtained, the thickness is determined according to the mechanical calculation result, and the weight is heavy, so that the third flange 17 is easy to incline after being installed, the sealing effect is affected, and in order to prevent the third flange 17 from inclining, the tensioning piece 18 is arranged. The third flange 17 can be aligned by the tensioning piece 18, and the pressure testing surface is attached to ensure the tightness of the hydrostatic test.

As shown in fig. 11, the casing 200 is a horizontally-split casing with an MCL structure, a hydraulic test tool introduces mechanical strength check analysis, the design structure of the casing and the third flange 17 is optimized many times, the material used for the third flange 17 is improved, the strength requirement is met, the weight of the tool is reduced, the installation operation is facilitated, the design structure characteristic of light weight of the tool runs through the design process thought, so that the processing and manufacturing cost of the tool is saved, the working efficiency is improved, the hoisting position of the third flange 17 (shown in fig. 12) is determined through calculation, the third flange 17 is ensured to vertically fall into the lower casing 200, and the assembly with the casing 200 is realized.

As shown in fig. 15, the assembly between the end cover 100 and the casing 200 of the present invention adopts a horizontal assembly, and the end cover pressure testing device is connected with the casing 200 to test the air tightness at the joint of the end cover 100 and the casing 200. The problem of the tonnage of a workshop crane is solved by adopting a horizontal assembly scheme with a downward air port and connecting an air inlet device and an air exhaust device by utilizing an air port 201. The novel third flange 17, the tensioning piece 18, the cap-shaped nut 12 and the like are designed according to test requirements, so that the hydraulic pressure requirement is met, and the qualification of the hydraulic pressure test is guaranteed.

In the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a large-scale compressor hydrostatic test device which characterized in that includes:

an end cap (100);

a first flange (5) provided on one side of the end cap (100);

a second flange (7) provided at the other side of the end cap (100);

a first fastening piece (2) arranged on one side of the first flange (5) far away from the end cover (100);

a second fastening member (2') arranged on the side of the second flange (7) far away from the end cover (100);

the connecting piece (1) axially penetrates through the first flange (5), the end cover (100) and the second flange (7), one end of the connecting piece (1) is connected with the first fastening piece (2), and the other end of the connecting piece (1) is connected with the second fastening piece (2');

and a water inlet structure (1-1) is arranged on the connecting piece (1) and used for injecting water into a cavity surrounded by the first flange (5), the end cover (100) and the second flange (7).

2. The hydraulic test device for the large-scale compressor according to claim 1,

the water inlet structure (1-1) comprises a water inlet channel (1-1a) and a plurality of water outlet channels (1-1b), and the water outlet channels (1-1b) are communicated with the water inlet channel (1-1a) and the cavity;

the water inlet channel (1-1a) comprises a water inlet hole (1-1a '), the water inlet hole (1-1a ') is arranged on the end face of one end of the connecting piece (1) connected with the first fastening piece (2), and the water inlet channel (1-1a) extends from the water inlet hole (1-1a ') to be communicated with the water outlet channel (1-1b) along the axial direction of the connecting piece (1);

the water outlet channel (1-1b) comprises water outlet holes (1-1b '), the water outlet holes (1-1b ') are circumferentially and uniformly distributed on the outer wall surface of the connecting piece (1), and the water outlet channel (1-1b) extends from the water outlet holes (1-1b ') to be communicated with the water inlet channel (1-1a) along the radial direction of the connecting piece (1).

3. The hydraulic test device for the large-scale compressor according to claim 1,

a hoisting hole (1-2) is formed in the connecting piece (1);

the hoisting hole (1-2) is arranged on the end face of one end, connected with the second fastening piece (2'), of the connecting piece (1), and the hoisting hole (1-2) extends along the axis direction of the connecting piece (1).

4. The hydraulic test device for the large-scale compressor according to claim 1,

the first fastener (2) or the second fastener (2') includes a fastening nut (2-1) and a fastening bolt (2-2);

a first threaded hole (2-1a) is formed in the center of the fastening nut (2-1), an external thread is formed on the connecting piece (1), and the fastening nut (2-1) is in threaded connection with the connecting piece (1);

two sides of the first threaded hole (2-1a) are symmetrically provided with a plurality of second threaded holes (2-1b) by taking a plane where a central axis of the fastening nut (2-1) is located as a symmetrical plane, and the fastening bolt (2-2) penetrates through the second threaded hole (2-1b) to be abutted against the first flange (5) or the second flange (7).

5. The hydraulic test device for the large-scale compressor according to claim 4,

the test device further comprises a sealing structure;

the sealing structure comprises a first sealing element (3) and a second sealing element (4);

when the first seal member (3) and the second seal member (4) are arranged in a stacked manner between the first fastening member (2) and the first flange (5) in the axial direction of the fastening nut (2-1), the first seal member (3) is arranged close to the first fastening member (2), the second seal member (4) is arranged close to the first flange (5), and the fastening bolt (2-2) abuts against the first seal member (3);

when the first seal member (3) and the second seal member (4) are arranged in a stacked manner between the second fastening member (2 ') and the second flange (7) in the axial direction of the fastening nut (2-1), the first seal member (3) is arranged close to the second fastening member (2'), the second seal member (4) is arranged close to the second flange (7), and the fastening bolt (2-2) abuts against the first seal member (3);

the diameter of the second seal (4) is greater than the diameter of the first seal (3), and the thickness of the second seal (4) is less than the thickness of the first seal (3).

6. The hydraulic test device for the large-scale compressor according to claim 1,

the testing device also comprises a support piece (16) used for supporting the end cover (100) to be placed in a horizontal state;

the supporting piece (16) is arranged at one end of the connecting piece (1) and is opposite to the water inlet structure (1-1).

7. The hydraulic test device for the large-scale compressor according to claim 1,

the testing device further comprises a housing (200);

third flanges (17) provided on both side ports of the cabinet (200);

and the hoisting structure (19) is arranged on the outer edge of the third flange (17) and is used for vertically hoisting the third flange (17) to the installation position in the machine shell (200).

8. The hydraulic test device for the large-scale compressor according to claim 7,

the hoisting structure (19) comprises a fixed plate (19-2) and a lifting lug (19-1), and the lifting lug (19-1) is arranged in the middle of the fixed plate (19-2);

the fixing plate (19-2) and the lifting lug (19-1) are integrally formed, and the fixing plate (19-2) is fixedly connected with the third flange (17).

9. The hydraulic test device for the large-scale compressor according to claim 7,

the outer edge of the third flange (17) is of a stepped structure and comprises a high-step part (17-2) and a low-step part (17-1), and the side ring surface of the high-step part (17-2) is connected with the outer ring surface of the low-step part (17-1);

at least two annular first sealing grooves are formed in the side ring surface of the high-step portion (17-2), and the groove bottoms of the first sealing grooves extend along the axial direction of the third flange (17);

at least one annular second sealing groove is formed in the outer annular surface of the low-step portion (17-1), and the groove bottom of the second sealing groove extends along the radial direction of the third flange (17).

10. The hydraulic test device for the large-scale compressor according to claim 7,

the test device further comprises a tension member (18);

the third flange (17) is arranged on the inner side of the port of the machine shell (200), the tensioning piece (18) is arranged on the outer side of the port of the machine shell (200) and spans the port of the machine shell (200), two ends of the tensioning piece (18) are respectively connected with the machine shell (200), and the middle part of the tensioning piece (18) is fixedly connected with the third flange (17).

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