CN115808269A - Valve sealing performance testing device and system - Google Patents
Valve sealing performance testing device and system Download PDFInfo
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- CN115808269A CN115808269A CN202310070386.2A CN202310070386A CN115808269A CN 115808269 A CN115808269 A CN 115808269A CN 202310070386 A CN202310070386 A CN 202310070386A CN 115808269 A CN115808269 A CN 115808269A
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- 238000007789 sealing Methods 0.000 title claims abstract description 109
- 238000012360 testing method Methods 0.000 title claims abstract description 96
- 239000003566 sealing material Substances 0.000 claims abstract description 25
- 239000012780 transparent material Substances 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 10
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- 238000006073 displacement reaction Methods 0.000 claims description 7
- 239000007769 metal material Substances 0.000 claims description 5
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- 239000002184 metal Substances 0.000 description 9
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- 239000012530 fluid Substances 0.000 description 3
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- 238000011156 evaluation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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Abstract
The invention relates to engine valve test equipment, provides a valve tightness test device and a valve tightness test system, and solves the problems that in the prior art, the valve tightness is indirectly judged by measuring parameters such as pressure, flow and the like, the conditions of a sealing structure and a sealing material cannot be directly observed, certain uncontrollable factors exist, the sealing structure and material distortion of the test device with a visual function are caused, and the design of the sealing structure has no reference value. The valve tightness testing device comprises a valve core and a shell; the shell comprises an inlet shell and a main shell which are made of transparent materials, a valve seat is arranged on the inlet shell, the valve core comprises a valve rod and a valve head, the valve head is matched with the valve seat to form a sealing structure, and the valve rod is driven by a driving device to move along the axial direction to realize the opening and closing of the valve core of the testing device; the invention also provides a tightness testing system comprising the testing device, which is used for testing the tightness of the sealing structure in the testing device.
Description
Technical Field
The invention relates to engine valve test equipment, in particular to a valve tightness test device and a valve tightness test system.
Background
The most critical part of the liquid rocket engine valve is the design of sealing, and whether the sealing is reliable or not relates to whether the valve can complete corresponding tasks according to the requirements of a system or not.
At present, in the process of developing a liquid rocket engine valve, the design of a sealing structure is usually only dependent on theoretical calculation and is assisted by related structural design experience, the reliability evaluation of the valve sealing structure is basically verified whether the sealing structure is reliable or not through an air tightness test after the processes of valve development, machining, assembly and the like are finished, and once sealing at the stage has a problem, key parts such as a valve shell or a valve core and the like are usually repaired, so that the development period and the cost are increased, and more uncontrollable factors are brought. Meanwhile, a soft sealing structure is generally used in a liquid rocket engine valve, and in the structure which ensures the sealing capability through metal-nonmetal extrusion elastic deformation, whether the working structure state of a nonmetal material under a complex working condition is controllable is particularly critical. At present, the actual situation of a sealing structure is unknown in the development of an engine sealing structure, the sealing structure is designed only through theoretical calculation and related structural design experience, or the reliability of the valve sealing structure is verified indirectly through measuring parameters such as pressure, flow and the like, and intuitive and visible design reference for the sealing structure and materials is lacked.
Specifically, the prior art has the following problems:
1) The tightness of the valve is indirectly judged by measuring parameters such as pressure and the like.
The sealing condition of the sealing structure and the sealing material has certain uncontrollable factors, the sealing at the valve port is similar to a black box and cannot be directly observed, and more data and reference cannot be provided for the design and the use of the structure; and after the valve is assembled, the gas tightness test is verified, and after the problem of tightness occurs, the whole valve needs to be disassembled and overhauled.
2) Visualization is possible, but this can lead to distortion of the seal and material.
In order to ensure the realization of the visual function, part of sealing structures and materials can be sacrificed, and the sealing structures and the materials are changed into transparent materials used by non-real valve sealing structures, the testing device and the system can be generally used for observing flow fields in valves, but the sealing states of different sealing materials and sealing structures cannot be researched for valves working in different environments, the real working conditions of the valves with complex working environments such as liquid rocket engine valves cannot be well simulated by the existing testing equipment and the testing method, and the design of the sealing structures of the liquid rocket engine valves cannot be guided and referred.
Disclosure of Invention
The invention aims to solve the defects that the sealing performance of a valve is indirectly judged by measuring parameters such as pressure, flow and the like, the conditions of a sealing structure and a sealing material cannot be directly observed, certain uncontrollable factors exist, the sealing structure and material distortion of a testing device with a visual function is realized, and a reference value is not provided for the design of the sealing structure of the valve, and provides a testing device and a testing system for the sealing performance of the valve.
In order to achieve the purpose, the technical solution provided by the invention is as follows:
the invention relates to a valve tightness testing device, which is characterized in that: comprises a valve core and a shell; the shell comprises an inlet shell and a main shell which are made of transparent materials, wherein the main shell is provided with an outlet flow channel, a first through hole and a first blind hole, and the first through hole is communicated with the bottom of the first blind hole and the external space of the main shell; the inlet shell is matched with the first blind hole and is embedded in the first blind hole, a cavity is reserved between the inner end surface of the inlet shell and the bottom of the first blind hole, and the cavity is communicated with an external pipeline through the outlet flow channel; an inlet flow passage is formed in the inlet shell and is communicated with the cavity and an external pipeline structure; a valve seat is arranged on the inner end surface of the inlet shell, and a flow port is formed in the central axis of the valve seat and corresponds to the inlet flow channel; the valve core comprises a valve rod arranged in the first through hole and a valve head arranged in the cavity and connected to one end of the valve rod, and the other end of the valve rod is connected with a driving device; the valve head comprises a sealing part and a connecting part, one end of the connecting part is detachably connected with the valve rod, the other end of the connecting part is connected with one side of the sealing part, and the other side of the sealing part is matched with the valve seat; the surface of the valve seat is provided with a sealing material, or the other side of the sealing part is provided with the sealing material;
when the valve is used, the driving device drives the valve rod to move towards the direction close to the inlet shell along the axis, and the sealing part is matched with the valve seat to enable the valve core to be in a closed state; the driving device drives the valve rod to move along the axis in the direction far away from the inlet shell, the inlet flow channel is communicated with the outlet flow channel through the cavity, and the valve core is in an open state.
Furthermore, an annular boss is arranged on one side surface of the valve seat opposite to the valve head, a plurality of fixing rods are connected to the other side of the valve seat, a plurality of second through holes are formed in the position, corresponding to the fixing rods, of the inlet shell along the axis direction, and the plurality of fixing rods penetrate through the second through holes respectively and are used for fixing the position of the valve seat; the valve seat is fixed by a fixing rod penetrating through the inlet shell, and the stability of the valve seat is improved.
Further, the sealing portion of the valve head is a sealing plate, one side of the sealing plate is connected with the connecting portion, and the sealing material is disposed on the other side surface of the sealing plate.
Furthermore, the connecting part is a connecting rod, one end of the connecting rod is provided with a fourth through hole in a direction perpendicular to the axis direction, and the other end of the connecting rod is connected with one side of the sealing plate;
a second blind hole is formed in the end face of one end of the valve rod, and two third through holes are formed in the corresponding positions of the side wall of the second blind hole;
one end of the connecting rod is nested in the second blind hole, the two ends of the fourth through hole correspond to the two third through holes, and the valve rod and the valve head are fixedly connected through pins arranged in the third through hole and the fourth through hole.
The valve rod and the valve head are fixed through the pins, so that the valve rod and the valve head are convenient to detach and install.
Further, the outlet flow channel is arranged perpendicular to the central axis of the inlet flow channel;
the inlet shell is of a step cylindrical structure, the diameter of the outer end face is larger than that of the inner end face, and the outer end face is flush with the surface of the main shell;
a step structure matched with the step of the inlet shell is arranged at the orifice of the first blind hole;
the inlet flow passage is disposed at a central axis of the inlet housing.
Further, an inlet cover plate and a valve rod cover plate are respectively arranged on the surface of the outer end face of the inlet shell of the main shell and the opposite surface of the outer end face of the inlet shell of the main shell; a sixth through hole and a ninth through hole are respectively formed in the inlet cover plate corresponding to the inlet runner and the second through hole, and the sixth through hole is used for communicating the inlet runner with an external pipeline;
the end part of the fixed rod, far away from the valve seat, penetrates through the ninth through hole and protrudes out of the inlet cover plate, the end part of the fixed rod is provided with a threaded structure, and a valve seat nut is correspondingly arranged on the threaded structure and used for fixedly connecting the valve seat with the inlet cover plate through the fixed rod;
a seventh through hole is formed in the position, corresponding to the first through hole, of the valve rod cover plate and used for connecting the valve rod with an external driving device;
the inlet cover plate is provided with a plurality of threaded holes corresponding to the valve rod cover plate, a plurality of fifth through holes are formed in the main shell body corresponding to the threaded holes, a plurality of long bolts penetrate through the threaded holes of the inlet cover plate and the valve rod cover plate and the corresponding fifth through holes respectively, and mounting nuts are arranged at the end portions of the long bolts to enable the inlet cover plate, the main shell body and the valve rod cover plate to be fixedly connected in sequence.
Furthermore, an outlet cover plate and a light-transmitting cover plate are respectively arranged on the surface where one end of the outlet flow channel of the main shell is located and the opposite surface of the surface;
the outlet cover plate is provided with an eighth through hole corresponding to the outlet flow passage and used for communicating the outlet flow passage with an external pipeline, and the light-transmitting cover plate is provided with a light-transmitting hole corresponding to the cavity and used for arranging a light source;
the outlet cover plate and the light-transmitting cover plate are correspondingly provided with a plurality of threaded holes, the main shell body corresponding to the threaded holes is provided with a plurality of tenth through holes, a plurality of long bolts penetrate through the threaded holes of the outlet cover plate and the light-transmitting cover plate and the corresponding tenth through holes respectively, and mounting nuts are arranged at the end parts of the long bolts to enable the outlet cover plate, the main shell body and the light-transmitting cover plate to be fixedly connected in sequence.
Further, the main shell and the inlet shell are both made of transparent organic materials;
the valve head, the valve seat, the inlet cover plate, the valve rod cover plate, the outlet cover plate and the light-transmitting cover plate are all made of metal materials.
Meanwhile, the invention also provides a valve tightness testing system, which is characterized in that:
the test device comprises the test device, a driving device connected with a valve rod, a storage box connected with the test device, a high-speed camera, a data transmission unit, a data receiving unit and a control unit; the outlet of the storage tank is communicated with an inlet flow channel of the testing device through an inlet pipeline, and a centrifugal pump station, a one-way valve and a pressure regulating valve are sequentially arranged on the inlet pipeline; an outlet flow passage of the testing device is communicated with an inlet of the storage tank through an outlet pipeline, and a filter is arranged on the outlet pipeline; a displacement sensor is arranged on the valve rod and used for monitoring the moving distance of the valve rod; the high-speed camera is arranged on one side of the main shell and is used for shooting the state of a sealing structure formed by the sealing part and the valve seat; an inlet pressure gauge, an inlet temperature sensor and an inlet pressure sensor are sequentially arranged between the pressure regulating valve and an inlet flow channel of the testing device, and an outlet pressure gauge, an outlet temperature sensor and an outlet pressure sensor are sequentially arranged between an outlet flow channel of the testing device and an inlet of the filter; the data of the inlet pressure gauge, the inlet temperature sensor, the inlet pressure sensor, the outlet pressure gauge, the outlet temperature sensor and the outlet pressure sensor and the picture of the high-speed camera are all transmitted to the data receiving unit through the data transmission unit;
the sealing performance testing system captures the structural states of the sealing material under different working conditions through a high-speed camera.
Furthermore, a first branch is arranged at the outlet of the centrifugal pump station and communicated with the inlet of the filter, and a first overflow valve is arranged on the first branch;
the outlet of the one-way valve is provided with a second branch communicated with the inlet of the filter, and a second overflow valve is arranged on the second branch;
the data receiving unit and the control unit are computers, and data of all instruments and sensors and pictures of the high-speed camera are transmitted to the computers through the data transmission unit;
the inlet pressure sensor, the outlet temperature sensor, the inlet temperature sensor and the high-speed camera are connected with synchronizers for controlling the synchronizations.
Compared with the prior art, the invention has the following beneficial effects:
1. the sealing of the tightness testing device is realized by the movement of the valve rod, and the sealing specific pressure of the sealing structure can be adjusted by adjusting the displacement of the valve rod; meanwhile, the main shell body and the inlet shell body are made of transparent materials, the valve head and the valve seat are the same as the structure and the materials used by an actual valve, and the sealing structure and the materials are guaranteed not to be distorted on the premise of having the visual function. When parameters such as the displacement of the valve rod, the sealing material, the valve head shape structure, the fluid flow, the pressure and the like are adjusted in the test, the change condition of the sealing structure can be directly observed, and the control of the sealing test process and the record observation of the test result are facilitated.
2. The valve head and the valve seat can be flexibly replaced through the detachable connection of the valve head and the valve rod and the detachable arrangement of the valve seat and the inlet shell, the whole device does not need to be detached, the structures of the valve head, the valve rod, the main shell and the inlet shell do not need to be matched again, meanwhile, the sealing material of the valve head is fixed through hot pressing or cold pressing and can also be replaced according to the test requirements, and the most suitable material is selected; by replacing the valve head and the valve seat, the testing device can almost cover all valve sealing structures, so that comprehensive reference can be provided for the design of the rocket engine sealing structure, and meanwhile, the testing device also has reference value for the design of the valve sealing structures in other industries.
3. The metal cover plate is arranged, so that the position of the inlet shell is fixed, and the inlet shell can bear higher pressure in a test; simultaneously, the cover plates are arranged on two opposite surfaces of the testing device, so that the transparent main shell structure is more stable, the metal cover plates arranged oppositely are fixed by using long bolts, the testing device can be fixed on other structures for use, and the problem of insufficient strength of the transparent organic material is solved.
4. In the tightness testing system, the storage tank is communicated with the testing device to form a testing loop, a testing medium can be recycled, and meanwhile, a high-speed camera is arranged to photograph the sealing structure, so that the sealing structure is observed.
Drawings
FIG. 1 is a cross-sectional view of one embodiment of a valve seal testing apparatus of the present invention;
FIG. 2 is a schematic view of a connection structure of a valve stem and a valve head in an embodiment of the valve tightness testing device of the present invention;
FIG. 3 is a schematic diagram of an external structure of an embodiment of a valve tightness testing device according to the present invention;
FIG. 4 is a schematic structural diagram of a valve seat and a fixing rod of an embodiment of a valve tightness testing device according to the present invention;
FIG. 5 is a right side view of FIG. 4;
fig. 6 is a connection diagram of an embodiment of a valve tightness testing system according to the invention.
Description of reference numerals:
1-a valve stem, 101-a second blind hole, 102-a third through hole, 2-a valve head, 201-a sealing plate, 202-a connecting rod, 203-a pin, 204-a sealing material, 205-a fourth through hole, 3-a valve seat, 301-a fixing rod, 302-a boss, 4-an inlet housing, 401-an inlet flow channel, 402-a second through hole, 5-a main housing, 501-an outlet flow channel, 502-a first through hole, 503-a first blind hole, 6-a valve stem cover plate, 7-an outlet cover plate, 701-an eighth through hole, 8-a light transmitting cover plate, 801-a light transmitting hole, 9-an inlet cover plate, 901-a sixth through hole, 902-a ninth through hole, 10-a first sealing ring, 11-a first retainer ring, 12-a second sealing ring, 13-a second retainer ring, 14-a third sealing ring, 15-a fourth sealing ring, 16-a mounting nut, 17-a long bolt, 18-a valve seat nut, 19-a fifth sealing ring, 20-a fifth retainer ring;
21-a storage tank, 22-a motor, 23-a centrifugal pump station, 24-a first overflow valve, 25-a one-way valve, 26-a second overflow valve, 27-a pressure regulating valve, 28-an inlet pressure gauge, 29-an inlet temperature sensor, 30-an inlet pressure sensor, 31-a light source, 32-a displacement sensor, 33-an electric push rod, 34-an outlet pressure gauge, 35-an outlet temperature sensor, 36-an outlet pressure sensor, 37-a filter, 38-a high-speed camera and 39-a computer.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
the valve tightness testing device disclosed by the invention comprises a valve core and a shell, as shown in figures 1 and 2; the shell comprises an inlet shell 4 and a main shell 5, an outlet flow passage 501, a first through hole 502 and a first blind hole 503 are formed in the main shell 5, and the first through hole 502 is communicated with the bottom of the first blind hole 503 and the outer space of the main shell 5; the inlet housing 4 is matched with the first blind hole 503 and is embedded in the first blind hole 503, the outer end face of the inlet housing 4 is flush with the surface of the main housing 5, a cavity is reserved between the inner end face and the bottom of the first blind hole 503, the cavity is communicated with the outside through the outlet flow channel 501, the inlet flow channel 401 is arranged at the central axis of the inlet housing 4, one end of the inlet flow channel 401 is communicated with the cavity, the other end of the inlet flow channel is communicated with an external pipeline, the inner end face of the inlet housing 4 is provided with the valve seat 3, the central axis of the valve seat 3 corresponds to the inlet flow channel 401 and is provided with a flow port, one side surface corresponds to the valve core and is provided with four fixing rods 301 uniformly in the circumferential direction, the inlet housing 4 corresponds to the positions of the fixing rods 301 in the axis direction and is provided with four second through holes 402, the four fixing rods 301 respectively penetrate through the second through holes 402 and are used for fixing the positions of the valve seat 3, and the end portions, far away from the valve seat 3, of the fixing rods 301 are provided with a thread structure. In this embodiment, as shown in fig. 4 and 5, the valve seat 3 is annular, and an annular boss 302 is provided on one side of the valve seat 3. In other embodiments of the present invention, the number of the fixing rods 301 and the corresponding second through holes 402 may be adjusted as needed.
In this embodiment, the inlet housing 4 is a stepped cylindrical structure, the diameter of the outer end surface is larger than that of the inner end surface, and the orifice of the first blind hole 503 is provided with a stepped structure matching with the step of the inlet housing 4.
The case is including setting up valve rod 1 in first through-hole 502 and setting in the cavity and connecting at the valve head 2 of valve rod 1 one end, and the other end of valve rod 1 is used for connecting drive arrangement, and valve head 2 includes sealing and connecting portion, and the one end of connecting portion is connected for dismantling with valve rod 1, and the other end is connected with one side of sealing, and the opposite side of sealing is provided with sealing material 204, and cooperatees the setting with the boss 302 of disk seat 3, and sealing material 204 passes through hot pressing or colds pressing to be fixed on the sealing, disk seat 3 and valve head 2 all adopt metal material, and sealing material 204 is non-metal material, and the sealing is realized sealedly through metal and non-metal material's extrusion with the seal structure that disk seat 3 formed. In another embodiment of the present invention, the sealing material 204 may be provided on one side of the valve seat 3, and the sealing material 204 may not be provided on the corresponding sealing portion, and the sealing portion may press the sealing material 204 on the valve seat 3 to seal.
In this embodiment, a second blind hole 101 is formed in an end face of one end of the valve rod 1, two third through holes 102 are formed in corresponding positions on a side wall of the second blind hole 101, a connecting portion of the valve head 2 is a connecting rod 202, a fourth through hole 205 is formed in one end of the connecting rod 202 perpendicular to an axis direction, the connecting rod 202 is embedded in the second blind hole 101, two ends of the fourth through hole 205 correspond to the two third through holes 102, and pins 203 are arranged in the third through hole 102 and the fourth through hole 205, so that the valve rod 1 and the valve head 2 are fixedly connected; the sealing part of the valve head 2 is a sealing plate 201, the center of one side of the sealing plate 201 is connected with the other end of the connecting rod 202, the sealing material 204 is tightly attached to the surface of the other side of the sealing plate 201 through hot pressing or cold pressing and is matched with one side of the valve seat 3, a groove is formed in the surface of the other side of the sealing plate 201 and is used for increasing the contact area between the sealing plate 201 and the sealing material 204, and the sealing material 204 is connected more stably. In other embodiments of the invention, the other side of the sealing portion may also be a conical, hemispherical or other shaped structure, while one side of the valve seat 3 is configured to mate with the conical, hemispherical or other shaped structure. When in sealing, the sealing parts are embedded on the corresponding valve seats 3, and the profiles, heights and structures of the valve seats 3 and the valve heads 2 can be changed and are not limited to a single type.
In the using process, when the driving device drives the valve rod 1 to move along the axis to the direction close to the inlet shell 4, the sealing plate 201 is tightly attached to the valve seat 3, the sealing structure formed by the sealing part and the valve seat 3 seals the inlet flow channel 401, the valve core is in a closed state, when the driving device drives the valve rod 1 to move along the axis to the direction far away from the inlet shell 4, the inlet flow channel 401 is communicated with the outlet flow channel 501 through the cavity, and the valve core is in an open state; the drive means may be an electric push rod 33 or other power means which may effect the displacement of the valve stem 1.
The outlet flow channel 501 is perpendicular to the central axis of the inlet flow channel 401, the main housing 5 and the inlet housing 4 are both made of transparent organic materials with good optical performance, metal cover plates are respectively arranged on four surfaces of the main housing 5, as shown in fig. 3, each metal cover plate includes an inlet cover plate 9 and a valve rod cover plate 6 which are oppositely arranged, and an outlet cover plate 7 and a light-transmitting cover plate 8 which are oppositely arranged, the inlet cover plate 9 is arranged on the surface of the outer end face of the inlet housing 4 of the main housing 5, a sixth through hole 901 and a ninth through hole 902 are respectively arranged on the inlet cover plate 9 corresponding to the inlet flow channel 401 and the second through hole 402, the end of the fixing rod 301 far away from the valve seat 3 passes through the ninth through hole 902 and protrudes out of the inlet cover plate 9, a valve seat nut 18 is correspondingly arranged on the thread structure of the end of the fixing rod 301, so that the valve seat 3 is fixedly connected with the inlet cover plate 9 through the fixing rod 301, and the sixth through hole 901 is used for communicating the inlet flow channel 401 with an external pipeline; a seventh through hole is formed in the position, corresponding to the first through hole 502, of the valve rod cover plate 6, and is used for connecting the valve rod 1 with an external driving device; the inlet cover plate 9 is provided with a plurality of threaded holes corresponding to the valve rod cover plate 6, a plurality of fifth through holes are formed in the main shell body 5 corresponding to the threaded holes, a plurality of long bolts 17 penetrate through the threaded holes corresponding to the inlet cover plate 9 and the valve rod cover plate 6 and the corresponding fifth through holes respectively, and the end portion of each long bolt is provided with a mounting nut 16 so that the inlet cover plate 9, the main shell body 5 and the valve rod cover plate 6 are fixedly connected in sequence.
The outlet cover plate 7 is arranged on the surface of the main housing 5 where one end of the outlet flow channel 501 is located, an eighth through hole 701 is arranged on the outlet cover plate 7 corresponding to the outlet flow channel 501 and used for communicating the outlet flow channel 501 with an external pipeline, and a light-transmitting hole 801 is arranged on the light-transmitting cover plate 8 corresponding to the cavity and used for arranging the light source 31; the outlet cover plate 7 and the light-transmitting cover plate 8 are correspondingly provided with a plurality of threaded holes, the main shell 5 corresponding to the threaded holes is provided with a plurality of tenth through holes, a plurality of long bolts 17 respectively penetrate through the threaded holes of the outlet cover plate 7 and the light-transmitting cover plate 8 and the corresponding tenth through holes, the end parts of the long bolts 17 are provided with mounting nuts 16 to enable the outlet cover plate 7, the main shell 5 and the light-transmitting cover plate 8 to be fixedly connected in sequence, and the threaded structures at the end parts of the long bolts 17 can also be used for fixedly connecting the valve body with an external structure; in other embodiments of the present invention, the threaded holes correspondingly formed in the inlet cover plate 9, the valve stem cover plate 6, the outlet cover plate 7 and the light-transmitting cover plate 8 may also be a plurality of unthreaded holes, and the long bolts 17 respectively pass through the corresponding unthreaded holes and are fixed by the corresponding mounting nuts 16, or the long bolts 17 are replaced by long screws, and both ends of each long screw are fixed by the corresponding mounting nuts 16.
In use, the light source 31 is disposed corresponding to the light transmission hole 801, the light source 31 irradiates the contact position of the sealing plate 201 and the inlet housing 4, and the high-speed camera 38 is disposed on the side of the main housing 5 where the metal cover is not disposed, and is used for shooting the sealing material 204 and the change of the sealing structure.
A first sealing ring 10 and a first retainer ring 11 are arranged between the valve rod 1 and the main casing 5, a second sealing ring 12 and a second retainer ring 13 are arranged between the contact surfaces of the side wall of the inlet casing 4 and the main casing 5, a third sealing ring 14 is arranged between the outlet cover plate 7 and the main casing 5 around the central axis of the outlet flow channel 501, a fourth sealing ring 15 is arranged between the inlet cover plate 9 and the inlet casing 4 around the central axis of the inlet flow channel 401, and a fifth sealing ring 19 and a fifth retainer ring 20 are arranged between the side wall of the ninth through hole 902 and the side wall of the fixing rod 301 for sealing each contact surface.
The assembly of the tightness testing device comprises the following steps:
s1, assembling a valve rod 1 and a valve head 2 through a pin 203 to form a valve core, inserting the whole valve core into a first through hole 502 through a first blind hole 503, positioning the valve head 2 in the first blind hole 503, and arranging a first sealing ring 10 and a first check ring 11 between the valve rod 1 and a main shell 5;
s2, a fixing rod 301 connected with the valve seat 3 penetrates through a second through hole 402 to be arranged, the inlet shell 4 is installed in a first blind hole 503, an inlet flow passage 401 and the valve seat 3 are arranged corresponding to the valve head 2, and meanwhile, a second sealing ring 12 and a second retaining ring 13 are arranged between the contact surface of the side wall of the inlet shell 4 and the main shell 5;
s3, installing a metal cover plate, fixing the position of the metal cover plate through a long bolt 17, and fixing the end part of the long bolt 17 through an installation nut 16; meanwhile, a third sealing ring 14 is arranged between the outlet cover plate 7 and the main casing 5 around the central axis of the outlet flow channel 501, a fourth sealing ring 15 is arranged between the inlet cover plate 9 and the inlet casing 4 around the central axis of the inlet flow channel 401, and a fifth sealing ring 19 and a fifth retainer ring 20 are arranged between the side wall of the ninth through hole 902 and the side wall of the fixing rod 301.
The valve tightness testing system of the invention, as shown in fig. 6, includes the above-mentioned testing device, the electric push rod 33 connecting the valve stem 1, the storage tank 21 communicating the testing device, the high-speed camera 38, the data transmission unit, the data receiving unit and the control unit, the storage tank 21 is used for storing the testing medium, the outlet of the storage tank 21 communicates the inlet flow channel 401 of the testing device through the inlet pipeline, the inlet pipeline has the centrifugal pump station 23, the check valve 25, the pressure regulating valve 27 along the medium flow direction in order; the outlet flow channel 501 of the testing device is communicated with the inlet of the storage tank 21 through an outlet pipeline, and a filter 37 is arranged on the outlet pipeline; a test loop is formed between the storage tank 21 and the test device, and a test medium can be repeatedly used in the test process; the outlet of the centrifugal pump station 23 is provided with a first branch communicated with the inlet of the filter 37, the first branch is provided with a first overflow valve 24, the outlet of the check valve 25 is provided with a second branch communicated with the inlet of the filter 37, and the second branch is provided with a second overflow valve 26; an inlet pressure gauge 28, an inlet temperature sensor 29 and an inlet pressure sensor 30 are sequentially arranged between the pressure regulating valve 27 and an inlet flow channel 401 of the testing device, an outlet pressure gauge 34, an outlet temperature sensor 35 and an outlet pressure sensor 36 are sequentially arranged between an outlet flow channel 501 of the testing device and an inlet of the filter 37, wherein the inlet pressure gauge 28 and the outlet pressure gauge 34 are respectively used for monitoring the pressure of an inlet pipeline and the pressure of an outlet pipeline in an initial state, and because the pressure gauges are usually gauge reading data and synchronous data is difficult to obtain in a test, in the test process, the corresponding pressures are accurately recorded through the inlet pressure sensor 30 and the outlet pressure sensor 36 when the valve core is rapidly opened and closed; the valve rod 1 is provided with a displacement sensor 32 for monitoring the moving distance of the valve rod 1; the high-speed camera 38 is arranged on one side of the main shell 5 where the metal cover plate is not arranged, and a light source 31 is arranged at a position corresponding to the light transmission hole 801 and used for matching with the high-speed camera 38 to work; in this embodiment, the data receiving unit and the control unit are a computer 39, and the data of each meter and sensor and the pictures of the high-speed camera 38 are transmitted to the computer 39 through the data transmission unit.
During testing, the motor 22 drives the centrifugal pump station 23 to work, so that a test medium sequentially passes through the one-way valve 25 and the pressure regulating valve 27 to enter the testing device, and the pressure regulating valve 27 is used for controlling the pressure of an inlet flow channel 401 of the testing device; the electric push rod 33 is connected with the valve rod 1 and used for controlling the valve core to open and close and maintaining a certain valve port back pressure in the test process. In the test process, when the valve core is in a closed state, the pressure of the inlet flow channel 401 is adjusted to the pressure required by the test through the pressure regulating valve 27, after the pressure is monitored to be stable through the inlet pressure gauge 28, the state of the sealing structure and the sealing material 204 is shot through the high-speed camera 38, the image is transmitted to the computer 39, the inlet pressure sensor 30, the outlet pressure sensor 36, the outlet temperature sensor 35, the inlet temperature sensor 29 and the high-speed camera 38 are ensured to work synchronously through the synchronizer, the data synchronization is ensured, and the accuracy of the test result is improved; when the system is in operation, the pressure of the inlet flow channel 401 is too high, the second overflow valve 26 can be opened to control the test medium to flow back along the second branch part, and the pressure at the test device is reduced; when the system fails, the test medium can be controlled to flow back along the first branch by opening the first overflow valve 24.
In the present invention, the test media may be selected from a variety of fluids, and the reservoir 21 is replaced with a reservoir body for a different fluid.
Claims (10)
1. The utility model provides a valve leakproofness testing arrangement which characterized in that:
comprises a valve core and a shell;
the shell comprises an inlet shell (4) and a main shell (5) which are made of transparent materials, an outlet flow channel (501), a first through hole (502) and a first blind hole (503) are formed in the main shell (5), and the first through hole (502) is communicated with the bottom of the first blind hole (503) and the outer space of the main shell (5);
the inlet shell (4) is matched with the first blind hole (503) and is embedded in the first blind hole (503), a cavity is reserved between the inner end surface of the inlet shell (4) and the bottom of the first blind hole (503), and the cavity is communicated with an external pipeline through the outlet flow channel (501); an inlet flow channel (401) is formed in the inlet shell (4), and the inlet flow channel (401) is communicated with the cavity and an external pipeline structure; a valve seat (3) is arranged on the inner end face of the inlet shell (4), and a flow opening is formed in the central axis of the valve seat (3) and corresponds to the inlet flow channel (401);
the valve core comprises a valve rod (1) arranged in the first through hole (502) and a valve head (2) arranged in the cavity and connected to one end of the valve rod (1), and the other end of the valve rod (1) is connected with a driving device; the valve head (2) comprises a sealing part and a connecting part, one end of the connecting part is detachably connected with the valve rod (1), the other end of the connecting part is connected with one side of the sealing part, and the other side of the sealing part is matched with the valve seat (3);
a sealing material (204) is arranged on the surface of the valve seat (3), or a sealing material (204) is arranged on the other side of the sealing part;
when the valve is used, the driving device drives the valve rod (1) to move towards the direction close to the inlet shell (4) along the axis, and the sealing part is matched with the valve seat (3) to enable the valve core to be in a closed state; the driving device drives the valve rod (1) to move along the axis in the direction far away from the inlet shell (4), the inlet flow channel (401) is communicated with the outlet flow channel (501) through the cavity, and the valve core is in an open state.
2. The valve tightness testing device according to claim 1, wherein:
one side face, opposite to the valve head (2), of the valve seat (3) is provided with an annular boss (302), the other side of the valve seat is connected with a plurality of fixing rods (301), the inlet shell (4) is provided with a plurality of second through holes (402) in the position corresponding to the fixing rods (301) along the axis direction, and the fixing rods (301) penetrate through the second through holes (402) respectively and are used for fixing the position of the valve seat (3).
3. The valve tightness testing device according to claim 2, wherein:
the sealing part of the valve head (2) is a sealing plate (201), one side of the sealing plate (201) is connected with the connecting part, and a sealing material (204) is arranged on the other side surface of the sealing plate (201).
4. A valve tightness testing device according to claim 3, wherein:
the connecting part is a connecting rod (202), one end of the connecting rod (202) is provided with a fourth through hole (205) in a direction perpendicular to the axis direction, and the other end of the connecting rod is connected with one side of the sealing plate (201);
a second blind hole (101) is formed in the end face of one end of the valve rod (1), and two third through holes (102) are formed in the corresponding positions of the side wall of the second blind hole (101);
one end of the connecting rod (202) is nested in the second blind hole (101), two ends of the fourth through hole (205) correspond to the two third through holes (102), and the valve rod (1) and the valve head (2) are fixedly connected through the arranged pins (203) in the third through hole (102) and the fourth through hole (205).
5. A valve tightness testing device according to any one of claims 2 to 4, characterized in that:
the outlet flow channel (501) is perpendicular to the central axis of the inlet flow channel (401);
the inlet shell (4) is of a step cylindrical structure, the diameter of the outer end face is larger than that of the inner end face, and the outer end face is flush with the surface of the main shell (5);
a step structure matched with a step of the inlet shell (4) is arranged at the orifice of the first blind hole (503);
the inlet flow channel (401) is arranged at the central axis of the inlet housing (4).
6. The valve tightness testing device according to claim 5, wherein:
an inlet cover plate (9) and a valve rod cover plate (6) are respectively arranged on the surface of the outer end face of the inlet shell (4) of the main shell (5) and the opposite surface of the outer end face; a sixth through hole (901) and a ninth through hole (902) are respectively formed in the inlet cover plate (9) corresponding to the inlet flow channel (401) and the second through hole (402), and the sixth through hole (901) is used for communicating the inlet flow channel (401) with an external pipeline;
the end part, far away from the valve seat (3), of the fixing rod (301) penetrates through the ninth through hole (902) and protrudes out of the inlet cover plate (9), the end part of the fixing rod is provided with a threaded structure, and the threaded structure is correspondingly provided with a valve seat nut (18) and is used for fixedly connecting the valve seat (3) with the inlet cover plate (9) through the fixing rod (301);
a seventh through hole is formed in the position, corresponding to the first through hole (502), of the valve rod cover plate (6) and used for connecting the valve rod (1) with an external driving device;
the inlet cover plate (9) is provided with a plurality of threaded holes corresponding to the valve rod cover plate (6), a plurality of fifth through holes are formed in the main shell (5) corresponding to the threaded holes, a plurality of long bolts (17) penetrate through the threaded holes of the inlet cover plate (9) and the valve rod cover plate (6) and the corresponding fifth through holes respectively, and mounting nuts (16) are arranged at the end portions of the long bolts (17) to enable the inlet cover plate (9), the main shell (5) and the valve rod cover plate (6) to be fixedly connected in sequence.
7. The valve tightness testing device according to claim 6, wherein:
an outlet cover plate (7) and a light-transmitting cover plate (8) are respectively arranged on the surface of one end of the outlet flow channel (501) of the main shell (5) and the opposite surface of the surface;
an eighth through hole (701) is formed in the outlet cover plate (7) and corresponds to the outlet flow channel (501) and is used for communicating the outlet flow channel (501) with an external pipeline, and a light transmitting hole (801) is formed in the position, corresponding to the cavity, of the light transmitting cover plate (8) and is used for arranging a light source (31);
the outlet cover plate (7) is provided with a plurality of threaded holes corresponding to the light-transmitting cover plate (8), a plurality of tenth through holes are formed in the main shell (5) corresponding to the threaded holes, a plurality of long bolts (17) penetrate through the threaded holes of the outlet cover plate (7) and the light-transmitting cover plate (8) and the corresponding tenth through holes respectively, and mounting nuts (16) are arranged at the end portions of the long bolts (17) to enable the outlet cover plate (7), the main shell (5) and the light-transmitting cover plate (8) to be fixedly connected in sequence.
8. The valve tightness testing device according to claim 7, wherein:
the main shell (5) and the inlet shell (4) are both made of transparent organic materials;
the valve head (2), the valve seat (3), the inlet cover plate (9), the valve rod cover plate (6), the outlet cover plate (7) and the light-transmitting cover plate (8) are all made of metal materials.
9. A valve leakproofness test system which characterized in that:
comprising a test device according to any one of claims 1-8, a drive device connected to the valve stem (1), a reservoir (21) connected to the test device, a high-speed camera (38), a data transmission unit, a data reception unit, and a control unit;
an outlet of the storage tank (21) is communicated with an inlet flow channel (401) of the testing device through an inlet pipeline, and a centrifugal pump station (23), a one-way valve (25) and a pressure regulating valve (27) are sequentially arranged on the inlet pipeline;
an outlet flow channel (501) of the testing device is communicated with an inlet of the storage box (21) through an outlet pipeline, and a filter (37) is arranged on the outlet pipeline;
a displacement sensor (32) is arranged on the valve rod (1) and used for monitoring the moving distance of the valve rod (1);
the high-speed camera (38) is arranged on one side of the main shell (5) and is used for shooting the state of a sealing structure formed by the sealing part and the valve seat (3);
an inlet pressure gauge (28), an inlet temperature sensor (29) and an inlet pressure sensor (30) are sequentially arranged between the pressure regulating valve (27) and an inlet flow channel (401) of the testing device, and an outlet pressure gauge (34), an outlet temperature sensor (35) and an outlet pressure sensor (36) are sequentially arranged between an outlet flow channel (501) of the testing device and an inlet of the filter (37);
and the data of the inlet pressure gauge (28), the inlet temperature sensor (29), the inlet pressure sensor (30), the outlet pressure gauge (34), the outlet temperature sensor (35) and the outlet pressure sensor (36) and the picture of the high-speed camera (38) are transmitted to the data receiving unit through the data transmission unit.
10. The valve tightness testing system according to claim 9, wherein:
a first branch is arranged at the outlet of the centrifugal pump station (23) and communicated with the inlet of the filter (37), and a first overflow valve (24) is arranged on the first branch;
a second branch is arranged at the outlet of the check valve (25) and communicated with the inlet of the filter (37), and a second overflow valve (26) is arranged on the second branch;
the data receiving unit and the control unit are computers (39), and data of the inlet pressure gauge (28), the inlet temperature sensor (29), the inlet pressure sensor (30), the outlet pressure gauge (34), the outlet temperature sensor (35) and the outlet pressure sensor (36) and pictures of the high-speed camera (38) are transmitted to the computers (39) through the data transmission unit;
and the inlet pressure sensor (30), the outlet pressure sensor (36), the outlet temperature sensor (35), the inlet temperature sensor (29) and the high-speed camera (38) are connected with synchronizers for controlling the synchronizations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310070386.2A CN115808269A (en) | 2023-02-07 | 2023-02-07 | Valve sealing performance testing device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310070386.2A CN115808269A (en) | 2023-02-07 | 2023-02-07 | Valve sealing performance testing device and system |
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| Publication Number | Publication Date |
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| CN115808269A true CN115808269A (en) | 2023-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310070386.2A Pending CN115808269A (en) | 2023-02-07 | 2023-02-07 | Valve sealing performance testing device and system |
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| CN (1) | CN115808269A (en) |
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Application publication date: 20230317 |