A vacuum check valve

Abstract

The present invention discloses an air extraction check valve, comprising a valve body, an annular top seat, a heat preservation sleeve seat, a side opening, a first locking component, a heat preservation chamber, a top opening, a temperature measuring circuit board, a temperature measuring sensor, a second locking component and a heating air diversion component. The present invention has the following advantages and effects: by connecting a heat preservation sleeve seat that is easy to install and disassemble outside the valve body, heating air can be introduced for heat preservation, and a detachable temperature sensor is built in to monitor the temperature inside the valve body in real time; this design not only improves the safety and stability of the system, but also provides operators with more accurate temperature information, thereby effectively preventing failures caused by abnormal temperature.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to an air extraction check valve. Background Art

[0002] In modern industry and daily life, air extraction systems are widely used in many fields such as air conditioning, refrigeration, gas transportation, etc. The core part of these systems, the air extraction check valve, is designed to ensure the one-way flow of fluid (gas or liquid) in the pipeline. The traditional air extraction check valve design mainly focuses on fluid control and sealing performance, but often ignores the impact of environmental factors on valve performance, especially the problems caused by temperature changes.

[0003] As the complexity of industrial applications increases, especially in low temperature or high humidity environments, the flow of gas in the pipeline may be significantly affected. For example, when the gas temperature drops to freezing point or below, condensation may occur inside the valve, causing the gas to solidify and freeze, which not only reduces the flow rate, but may also cause valve damage, thus affecting the safety and efficiency of the entire system. The existing solution is to lay a layer of insulation material outside the valve body, and the actual laying and removal process is very cumbersome.

[0004] In addition, traditional vacuum check valves lack effective temperature monitoring methods. In many applications, operators cannot obtain real-time temperature information in the valve body, resulting in failure to take timely measures when the temperature is abnormal. This affects the reliability of the system and may lead to reduced production efficiency or equipment failure.

[0005] In order to solve this series of problems, the present invention aims to provide a vacuum check valve, which can be connected to the outer valve body with a heat-insulating socket that is easy to install and disassemble, so that heating can be introduced for heat preservation, and a detachable temperature sensor is built in to monitor the temperature inside the valve body in real time. This design not only improves the safety and stability of the system, but also provides operators with more accurate temperature information, thereby effectively preventing malfunctions caused by abnormal temperature. Summary of the invention

[0006] The object of the present invention is to provide an air extraction check valve to solve the problems raised in the background technology.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: An air extraction check valve comprises a valve body; An annular top seat is fixedly arranged on both sides of the upper end of the valve body, an insulation sleeve seat is sleeved on the outer peripheral wall of the valve body, a side opening cavity is opened inside the insulation sleeve seat, and a first locking component is arranged in the side opening cavity. When the insulation sleeve seat is sleeved on the outer peripheral wall of the valve body and docked with the annular top seat, the first locking component can automatically lock the insulation sleeve seat on the annular top seat; The insulation socket has an insulation chamber inside, and the insulation chamber is arranged around the valve body; The top of the thermal insulation socket is provided with a top cavity, a temperature measuring circuit board is inserted in the top cavity, and a temperature measuring sensor is welded on the temperature measuring circuit board; a second locking component capable of automatically locking the temperature measuring circuit board inserted into the top cavity is provided in the thermal insulation socket; The insulation socket is provided with a heating air diversion component inside, and the heating air diversion component is connected to the external heating generating device, and can receive the heating air generated by the heating generating device and output it to one of the three output channels; The three output channels are respectively connected to the first locking component, the heat preservation chamber and the second locking component; the first locking component and the second locking component are both configured as pneumatic unlocking structures. When the first locking component and the second locking component receive the heat generated by the heating generating device, they can respectively release the lock of the heat preservation socket and the temperature measuring circuit board.

[0008] Further configuration is: when the number of the insulation sleeve seat is one, the insulation sleeve seat can be docked with the left side or right side of the annular top seat; when the number of the insulation sleeve seat is two, the two insulation sleeve seats can be docked with the left side and right side of the annular top seat respectively; The left and right sides of the annular top seat are fixedly provided with two horizontal extension sections extending horizontally outward, and there is a gap between the two horizontal extension sections; the upper and lower walls of the side opening cavity are provided with recessed notches, and after the thermal insulation sleeve is docked with the annular top seat, the two horizontal extension sections will respectively extend into the corresponding recessed notches; the first locking component includes two locking sub-components separated from the upper and lower parts of the side opening cavity, and after the thermal insulation sleeve is docked with the annular top seat, the two locking sub-components can respectively contact and lock the horizontal extension sections.

[0009] The further configuration is that: the first locking component includes a first locking inner shell, a locking inner hole which passes vertically through the first locking inner shell, a through hole which passes horizontally through the first locking inner shell, a closed shaft is arranged at the horizontal axis of the side opening, the closed shaft passes through the through hole and divides the locking inner hole into two sub-locking inner holes; the two locking sub-components each include locking contacts which are respectively arranged in the corresponding sub-locking inner holes, the two locking contacts both keep moving outward under normal conditions, the inner sides of the two horizontal extension sections are each provided with a locking contact groove, and the two sub-locking inner holes are each provided with a first dynamic spring which respectively provides outward movement energy to the corresponding locking contacts, so that the two locking contacts can respectively move outward and be pressed into the corresponding locking contact grooves to lock the two horizontal extension sections; The outer end of the locking contact block is provided with an inner pressure inclined surface which can be pressed downwards during the contact process with the corresponding horizontal extension section.

[0010] The further configuration is as follows: an inner moving block is also movably arranged in the locking sub-inner hole, the inner moving block is located on the inner side of the locking contact block, the inner moving block and the locking contact block are fixed by two vertical connecting shafts respectively abutting against the left and right inner walls of the sub-locking inner hole, and the four form a whole that moves together; a fill-in type limit block is arranged in the space between the inner moving block and the corresponding locking contact block, the fill-in type limit block is fixed on the thermal insulation sleeve seat, and the two sides of the fill-in type limit block are respectively abutted against the inner sides of the two vertical connecting shafts, so as to separate the space between the inner moving block and the corresponding locking contact block into an outer sealing cavity and an inner sealing cavity respectively located on the outer side and the inner side of the fill-in type limit block; The first dynamic spring is arranged in the outer sealing cavity; After the locking contact block is pressed into the corresponding locking contact groove, the inner moving block will be pressed against the fill-in limit block for limit; the inner moving block and the fill-in limit block are both provided with semicircular concave surfaces on the side facing each other, and when the inner moving block and the fill-in limit block are pressed against each other, the two semicircular concave surfaces will cooperate to form a circular concave surface, and the first locking inner shell is provided with sub-air pipes which are respectively connected with the two semicircular concave surfaces and extend to the surface of the insulation sleeve seat.

[0011] Further configuration is: a first outwardly expanding protrusion is fixedly arranged on the outer side of the fill-in limiting block, and the first outwardly expanding protrusion can be against the locking contact block, thereby preventing the first moving spring from being crushed; A plurality of second outwardly expanding protrusions are fixedly arranged on the left and right sides of the first locking inner shell.

[0012] Further configuration is that: a push panel and a retract panel are fixedly arranged on both sides of the closed shaft, and a force groove for the push panel to be pressed into is provided on the left and right sides of the annular top seat; the push panel and the retract panel are respectively located on both sides of the first locking inner shell, and a second dynamic spring is arranged between the push panel and the first locking inner shell to provide leftward movement energy for the push panel, and when the two locking contact blocks are respectively separated from the corresponding locking contact grooves, the push panel will move leftward, so that the annular top seat and the thermal insulation sleeve seat are quickly separated; The push-open panel and the retracted panel are respectively provided with recessed grooves adapted to the second outwardly expanding protrusions.

[0013] Further configuration is: a vertical positioning shaft is fixedly arranged in the top opening cavity, a positioning inner groove for the positioning shaft to extend into is opened at the lower end of the temperature measuring circuit board, the temperature measuring sensor is welded directly below the temperature measuring circuit board, and after the positioning shaft extends into the bottom of the positioning inner groove, the temperature measuring sensor will be attached to the lower end wall of the top opening cavity; The heat preservation chamber is located near the top opening; The second locking component includes a second locking inner shell fixed in the thermal insulation socket, the second locking inner shell is located on the left side of the top opening, a horizontal inner cavity is provided in the second locking inner shell, the right side of the horizontal inner cavity is an opening, a locking pressure block is movably provided in the horizontal inner cavity, the locking pressure block keeps moving rightward under normal conditions, a locking pressure groove is provided on the left side of the temperature measuring circuit board, and a third dynamic spring is provided in the horizontal inner cavity to provide rightward movement energy for the locking pressure block, so that the locking pressure block can move rightward and press into the locking pressure groove to lock the temperature measuring circuit board; The right end of the locking pressing block is provided with a left pressing inclined surface which can be pressed to the left during the contact process with the temperature measuring circuit board.

[0014] Further configuration is: a lower end block is fixedly provided at the lower end of the locking pressure block, a sealing block is fixedly provided on the right side of the horizontal inner cavity, and the lower end block can be pressed against the sealing block for limiting; a through hole is formed between the sealing block and the upper wall of the horizontal inner cavity for the locking pressure block to pass through; A vertical isotropic axis is fixedly arranged in the lower end block, the upper end of the isotropic axis extends into and is fixed in the locking pressure block, and the lower end is kept in contact with the lower wall of the horizontal inner cavity; a sealed inner cavity is formed between the isotropic axis and the sealing block, and an air connection hole which is always connected to the sealed inner cavity is opened at the lower end of the second locking inner shell.

[0015] Further configuration is: the heating air diversion component includes a diversion inner cavity provided in a heat preservation sleeve seat, a diversion block is movably provided in the diversion inner cavity, an output inner hole extending to the right side wall of the diversion block is provided inside the diversion block, an input pipe extending vertically to the diversion inner cavity and connected to the output inner hole is fixedly provided on the surface of the heat preservation sleeve seat, and the outer periphery of the input pipe has a hard layer; the surface of the heat preservation sleeve seat is provided with an activity area for the input pipe to move; The three output channels are respectively a first channel, a second channel and a third channel opened in the heat preservation socket, the first channel is provided with a female air connection pipe extending to the surface of the heat preservation socket, the female air connection pipe is connected to the sub-air connection pipe through an external pipe, the second channel is connected to the heat preservation chamber, and the third channel is connected to the air connection hole; As the diverter block moves, the output inner hole in the diverter block will be connected to one of the first channel, the second channel and the third channel.

[0016] Further configuration is: an alignment inner cavity is provided in the diverter block, the left side of the alignment inner cavity is an opening, an alignment ball and an alignment spring are provided in the alignment inner cavity, the alignment spring provides the alignment ball with leftward movement energy, and a limiting section is fixedly provided on the left side of the alignment inner cavity to prevent the alignment ball from completely disengaging; a first alignment concave surface, a second alignment concave surface and a third alignment concave surface are provided on the left side wall of the diverter inner cavity from bottom to top in sequence, and the alignment ball can be extended into one of the first alignment concave surface, the second alignment concave surface and the third alignment concave surface for alignment; when the alignment ball is extended into the first alignment concave surface, the output inner hole is only connected to the first channel; when the alignment ball is extended into the second alignment concave surface, the output inner hole is only connected to the second channel; when the alignment ball is extended into the third alignment concave surface, the output inner hole is only connected to the third channel.

[0017] The beneficial effects of the present invention are: 1. In the present invention, the purpose of heat preservation is achieved by sleeve-fitting the heat-insulating socket on the outer peripheral wall of the valve body. The heat-insulating socket and the valve body are detachable structures, which are convenient for installation and disassembly. The heat-insulating socket on the valve body that does not need heat preservation can also be removed and assembled on the valve body in a low-temperature environment, which provides convenience for the actual use layout; the heat-insulating chamber in the heat-insulating socket is arranged around the valve body, which can effectively insulate the fluid inside the valve body; the first locking component can automatically lock the heat-insulating socket on the annular top seat; the top opening is for the assembly of the temperature measuring circuit board, and the second locking component can automatically lock the temperature measuring circuit board inserted into the top opening. In addition, a heating diversion component is provided to control the output path of the added heating, so that the heating can pass into the first locking component to unlock it, or pass into the heat-insulating chamber to achieve heat preservation, or pass into the second locking component to unlock it; thereby achieving the purpose of single-end input and three-stage output, with only one input port for convenient connection with the heating generating equipment, and no wrong connection, and can also simplify the external pipeline wiring, which is convenient for implementation.

[0018] 2. In the present invention, two insulation sleeve seats can be assembled on the valve body at the same time, providing protection for use in extreme low temperature environments; the two horizontal extension sections on the annular top seat can respectively extend into the corresponding recessed notches, and the two locking sub-components in the first locking component can respectively contact and lock with the horizontal extension sections, thereby achieving double locking and improving stability.

[0019] 3. In the present invention, only one closed shaft is required to form two sub-locking inner holes. The locking contacts arranged in the two sub-locking inner holes can be moved outwards and pressed into the corresponding locking contact grooves under the push of the first dynamic spring to lock the two horizontal extension sections. The downward pressing inclined surface can be pressed downwards during the contact process with the corresponding horizontal extension section to realize automatic assembly.

[0020] 4. In the present invention, the inner moving block is fixed to the locking contact block by two vertical connecting shafts; the fill-in limit block is fixed on the insulation sleeve seat, and is immovable relative to the locking contact block and the inner moving block; the fill-in limit block can not only limit the position by leaning against the locking contact block and the inner moving block respectively, but also separate the outer sealing chamber and the inner sealing chamber, the outer sealing chamber is for setting the first dynamic spring, and the inner sealing chamber is used to receive gas to drive the locking contact block to move inward.

[0021] 5. In the present invention, the first outwardly expanding protrusion can protect the first dynamic spring; the second outwardly expanding protrusion provides space for fixing the first locking inner shell.

[0022] 6. In the present invention, after the locking contact blocks are separated from the corresponding locking contact grooves, the panel will be pushed open and move to the left, so that the annular top seat and the insulation sleeve seat are quickly separated, which is convenient for removing the insulation sleeve seat; the setting of the recessed groove allows the second outwardly expanding protrusion to extend into, thereby improving space utilization.

[0023] 7. In the present invention, the positioning shaft can guide and position the temperature measuring circuit board; the locking pressure block in the second locking component can be pressed into the locking pressure groove under the right movement energy provided by the third dynamic spring to lock the temperature measuring circuit board; the internal pressure slope can improve the smoothness of the temperature measuring circuit board extending into the top opening.

[0024] 8. In the present invention, the lower end block can be close to the sealing block for limiting the position, and the arrangement of the sealed inner cavity and the air receiving hole can receive the injected warm air.

[0025] 9. In the present invention, the input pipe is used for heating gas injection, and the hard layer on the outer periphery of the input pipe is used for the user's hand to exert force to control the diverter block to move vertically. The movable area is used for the input pipe to be led out, and it is also convenient for the hand to hold the hard layer; as the diverter block moves, the output inner hole in the diverter block will be connected to one of the first channel, the second channel and the third channel.

[0026] 10. In the present invention, the alignment ball can align the left movement of the spring and extend downward into one of the first alignment concave surface, the second alignment concave surface and the third alignment concave surface for alignment, which can not only achieve alignment but also prevent the diverter block from shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an embodiment; Figure 2 for Figure 1 Enlarged view of part A in the middle; Figure 3 for Figure 2 Enlarged view of middle part B; Figure 4 for Figure 2 Enlarged view of part C in the middle.

[0028] In the figure: 11, valve body; 12, annular top seat; 121, force groove; 20, insulation sleeve seat; 21, side opening; 22, insulation chamber; 23, top opening; 231, temperature measuring circuit board; 232, temperature measuring sensor; 24, positioning shaft; 25, positioning inner groove; 31, horizontal extension section; 311, locking contact groove; 32, recessed notch; 41, first locking inner shell; 411, second outward expansion protrusion; 42, closed shaft; 43, sub-locking inner hole; 44, locking contact block; 441, internal pressure inclined surface; 45, first dynamic spring; 46, inner displacement block; 47, vertical connecting shaft; 48, fill-in limit block; 481, first outward expansion protrusion; 49, sub-connecting air pipe; 51, push-open panel; 52, retract panel ; 53, second moving spring; 54, recessed groove; 61, second locking inner shell; 611, air connection hole; 62, horizontal inner cavity; 63, locking pressure block; 631, left pressure slope; 64, locking pressure groove; 65, third moving spring; 66, sealing block; 67, lower end block; 68, co-axial; 69, sealing inner cavity; 71, shunt inner cavity; 72, shunt block; 721, output inner hole; 73, input pipe; 731, hard layer; 81, first channel; 811, female air connection pipe; 82, second channel; 83, third channel; 91, alignment inner cavity; 92, alignment ball; 93, alignment spring; 94, limiting section; 951, first alignment concave surface; 952, second alignment concave surface; 953, third alignment concave surface. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0030] As attached Figure 1-4 As shown; The present embodiment discloses an air extraction check valve, including a valve body 11; the air extraction check valve is a conventional valve, and its internal structure belongs to the prior art, which will not be elaborated here.

[0031] An annular top seat 12 is fixedly arranged on both sides of the upper end of the valve body 11, and an insulating sleeve seat 20 is sleeved on the outer peripheral wall of the valve body 11. A side opening 21 is opened inside the insulating sleeve seat 20, and a first locking member is arranged in the side opening 21. When the insulating sleeve seat 20 is sleeved on the outer peripheral wall of the valve body 11 and docked with the annular top seat 12, the first locking member can automatically lock the insulating sleeve seat 20 on the annular top seat 12; The insulation socket 20 has an insulation chamber 22 formed inside, and the insulation chamber 22 surrounds the valve body 11; A top cavity 23 is formed at the top of the heat preservation socket 20, a temperature measuring circuit board 231 is inserted into the top cavity 23, and a temperature measuring sensor 232 is welded on the temperature measuring circuit board 231; a second locking member capable of automatically locking the temperature measuring circuit board 231 inserted into the top cavity 23 is provided in the heat preservation socket 20; The heat preservation socket 20 is provided with a heating air diversion component inside, which is connected to the external heating generating device and can receive the heating air generated by the heating generating device and output it to one of the three output channels; The three output channels are respectively connected to the first locking component, the insulation chamber 22 and the second locking component; the first locking component and the second locking component are both configured as pneumatic unlocking structures. When the first locking component and the second locking component receive the heat generated by the heating generating device, they can respectively release the lock of the insulation socket 20 and the temperature measuring circuit board 231.

[0032] Among them, when the number of the insulation sleeve seat 20 is one, the insulation sleeve seat 20 can be docked with the left side or the right side of the annular top seat 12; when the number of the insulation sleeve seat 20 is two, the two insulation sleeve seats 20 can be docked with the left side and the right side of the annular top seat 12 respectively; Two horizontal extension sections 31 extending horizontally outward are fixedly provided on the left and right sides of the annular top seat 12, and there is a gap between the two horizontal extension sections 31; the upper and lower walls of the side opening cavity 21 are provided with recessed notches 32, and after the insulation sleeve 20 is docked with the annular top seat 12, the two horizontal extension sections 31 will respectively extend into the corresponding recessed notches 32; the first locking component includes two locking sub-components separated from the upper and lower parts of the side opening cavity 21, and after the insulation sleeve 20 is docked with the annular top seat 12, the two locking sub-components can respectively contact and lock the horizontal extension sections 31.

[0033] Among them, the first locking component includes a first locking inner shell 41, a vertically penetrating locking inner hole is provided in the first locking inner shell 41, and a transversely penetrating through hole is also provided in the first locking inner shell 41, and a closed shaft 42 is provided at the horizontal axis of the side opening 21, and the closed shaft 42 passes through the through hole and divides the locking inner hole into two sub-locking inner holes 43; the two locking sub-components each include a locking contact 44 respectively arranged in the corresponding sub-locking inner hole 43, and the two locking contacts 44 keep moving outward under normal conditions, and the inner sides of the two horizontal extension sections 31 are provided with a locking contact groove 311, and the two sub-locking inner holes 43 are provided with a first moving spring 45 that provides outward movement energy to the corresponding locking contacts 44, so that the two locking contacts 44 can move outward and press into the corresponding locking contact groove 311 respectively, so as to lock the two horizontal extension sections 31; An outer end of the locking contact block 44 is provided with an inner pressure inclined surface 441 which can be pressed downwards during the contact process with the corresponding horizontal extension section 31 .

[0034] Among them, an inner moving block 46 is also movably arranged in the locking sub-inner hole, and the inner moving block 46 is located on the inner side of the locking contact block 44. The inner moving block 46 and the locking contact block 44 are fixed by two vertical connecting shafts 47 respectively affixed to the left and right inner walls of the sub-locking inner hole 43, and the four form a whole that moves together; a fill-in type limit block 48 is arranged in the space between the inner moving block 46 and the corresponding locking contact block 44, and the fill-in type limit block 48 is fixed on the insulation sleeve seat 20, and the two sides of the fill-in type limit block 48 are respectively affixed to the inner sides of the two vertical connecting shafts 47, so as to separate the space between the inner moving block 46 and the corresponding locking contact block 44 into an outer sealing cavity and an inner sealing cavity respectively located on the outer side and the inner side of the fill-in type limit block 48; A first dynamic spring 45 is arranged in the outer sealing cavity; After the locking contact block 44 is pressed into the corresponding locking contact groove 311, the inward moving block 46 will be pressed against the fill-in limit block 48 for limit. The inward moving block 46 and the fill-in limit block 48 are both provided with semicircular concave surfaces on the side facing each other. When the inward moving block 46 and the fill-in limit block 48 are pressed against each other, the two semicircular concave surfaces will cooperate to form a circular concave surface. The first locking inner shell 41 is provided with sub-air pipes 49 which are respectively connected with the two semicircular concave surfaces and extend to the surface of the insulation sleeve 20.

[0035] Among them, a first outwardly expanded protrusion 481 is fixedly arranged on the outer side of the filling-in limiting block 48, and the first outwardly expanded protrusion 481 can be against the locking contact block 44, thereby preventing the first moving spring 45 from being crushed; A plurality of second outwardly extending protrusions 411 are fixedly disposed on both the left and right sides of the first locking inner shell 41 .

[0036] Among them, a push-open panel 51 and a retracting panel 52 are fixedly arranged on both sides of the closed shaft 42, and a force groove 121 for the push-open panel 51 to push into is opened on the left and right sides of the annular top seat 12; the push-open panel 51 and the retracting panel 52 are respectively located on both sides of the first locking inner shell 41, and a second dynamic spring 53 is arranged between the push-open panel 51 and the first locking inner shell 41 to provide leftward movement energy for the push-open panel 51. When the two locking contact blocks 44 are respectively separated from the corresponding locking contact grooves 311, the push-open panel 51 will move left, so that the annular top seat 12 is quickly separated from the thermal insulation sleeve seat 20; The push panel 51 and the retract panel 52 are respectively provided with recessed grooves 54 adapted to the second outwardly extending protrusions 411 .

[0037] Among them, a vertical positioning shaft 24 is fixedly arranged in the top opening 23, a positioning inner groove 25 for the positioning shaft 24 to extend into is opened at the lower end of the temperature measuring circuit board 231, and a temperature measuring sensor 232 is welded directly below the temperature measuring circuit board 231. After the positioning shaft 24 extends into the bottom of the positioning inner groove 25, the temperature measuring sensor 232 will be attached to the lower end wall of the top opening 23; The heat preservation chamber 22 is located near the top opening 23; The second locking member includes a second locking inner shell 61 fixed in the heat preservation socket 20, the second locking inner shell 61 is located on the left side of the top opening 23, a horizontal inner cavity 62 is provided in the second locking inner shell 61, the right side of the horizontal inner cavity 62 is an opening, a locking pressure block 63 is movably provided in the horizontal inner cavity 62, the locking pressure block 63 keeps moving rightward under normal conditions, a locking pressure groove 64 is provided on the left side of the temperature measuring circuit board 231, and a third dynamic spring 65 is provided in the horizontal inner cavity 62 to provide rightward movement energy for the locking pressure block 63, so that the locking pressure block 63 can move rightward and press into the locking pressure groove 64 to lock the temperature measuring circuit board 231; A left pressing inclined surface 631 is formed at the right end of the locking pressing block 63 so as to be pressed to the left when in contact with the temperature measuring circuit board 231 .

[0038] Among them, a lower end block 67 is fixedly provided at the lower end of the locking pressure block 63, and a sealing block 66 is fixedly provided on the right side of the horizontal inner cavity 62, and the lower end block 67 can be close to the sealing block 66 for limiting; a through hole is formed between the sealing block 66 and the upper wall of the horizontal inner cavity 62 for the locking pressure block 63 to pass through; A vertical isotropic shaft 68 is fixedly arranged in the lower end block 67, the upper end of which extends into and is fixed in the locking pressure block 63, and the lower end is kept in contact with the lower wall of the horizontal inner cavity 62; a sealed inner cavity 69 is formed between the isotropic shaft 68 and the sealing block 66, and an air connection hole 611 which is always connected to the sealed inner cavity 69 is opened at the lower end of the second locking inner shell 61.

[0039] Among them, the heating diversion component includes a diversion inner cavity 71 opened in the insulation sleeve seat 20, a diversion block 72 is movably arranged in the diversion inner cavity 71, an output inner hole 721 extending to the right side wall of the diversion block 72 is opened inside, and an input pipe 73 extending vertically to the diversion inner cavity 71 and connected to the output inner hole 721 is fixedly arranged on the surface of the insulation sleeve seat 20, and the outer periphery of the input pipe 73 has a hard layer 731; the surface of the insulation sleeve seat 20 is provided with an activity area for the input pipe 73 to move; The three output channels are respectively a first channel 81, a second channel 82 and a third channel 83 opened in the heat preservation socket 20. The first channel 81 is provided with a female air connection pipe 811 extending to the surface of the heat preservation socket 20. The second channel 82 is connected to the heat preservation chamber 22. The third channel 83 is connected to the air connection hole 611. As the diverter block 72 moves, the output inner hole 721 in the diverter block 72 is communicated with one of the first channel 81 , the second channel 82 and the third channel 83 .

[0040] Among them, an alignment inner cavity 91 is opened in the diverter block 72, and the left side of the alignment inner cavity 91 is an opening. An alignment ball 92 and an alignment spring 93 are arranged in the alignment inner cavity 91. The alignment spring 93 provides the alignment ball 92 with leftward movement energy. A limiting section 94 is fixedly arranged on the left side of the alignment inner cavity 91 to prevent the alignment ball 92 from completely disengaging; the left side wall of the diverter inner cavity 71 is sequentially provided with a first alignment concave surface 951, a second alignment concave surface 952 and a third alignment concave surface 953 from bottom to top, and the alignment The ball 92 can be extended into one of the first alignment concave surface 951, the second alignment concave surface 952 and the third alignment concave surface 953 for alignment; when the alignment ball 92 is extended into the first alignment concave surface 951, the output inner hole 721 is only connected to the first channel 81; when the alignment ball 92 is extended into the second alignment concave surface 952, the output inner hole 721 is only connected to the second channel 82; when the alignment ball 92 is extended into the third alignment concave surface 953, the output inner hole 721 is only connected to the third channel 83.

[0041] When installing the insulation socket 20: 1. The insulation sleeve 20 is docked with the left or right side of the annular top seat 12. After docking, the two horizontal extension sections 31 will extend into the corresponding recessed notches 32 respectively, and then the two locking sub-components can contact and lock the horizontal extension sections 31 respectively.

[0042] 2. The locking contacts 44 in the two locking sub-components will move outwards and press into the corresponding locking contact grooves 311 under the outward movement energy provided by the corresponding first dynamic springs 45 to lock the two horizontal extension sections 31.

[0043] 3. In the process of docking the insulation sleeve 20 with the left or right side of the annular top seat 12, the push-open panel 51 will press into the force groove 121. As the insulation sleeve 20 and the annular top seat 12 continue to dock, the push-open panel 51 will be forced to move right, so that the second dynamic spring 53 is in a compressed state, so that the insulation sleeve 20 can be disassembled later, and the push-open panel 51 can be moved to the left, allowing the annular top seat 12 and the insulation sleeve 20 to be quickly separated.

[0044] When installing the temperature sensor 232: 1. Weld the temperature sensor 232 directly below the temperature measuring circuit board 231, push the temperature measuring circuit board 231 into the top opening 23, and extend the positioning shaft 24 into the positioning inner groove 25 to play a guiding role; 2. When the temperature measuring circuit board 231 is pushed into the top opening 23 , the locking pressing block 63 can move rightward under the rightward movement energy provided by the third dynamic spring 65 and press into the locking pressing groove 64 to lock the temperature measuring circuit board 231 .

[0045] Process of injecting warm air into the heat preservation chamber 22: 1. Push the diverter block 72 to locate in the middle of the diverter inner cavity 71 . At this time, after the alignment ball 92 extends into the second alignment concave surface 952 , the output inner hole 721 is only connected to the second channel 82 .

[0046] 2. Connect the conduit on the heating generating device to the input pipe 73 , and the heating energy can be delivered to the heat preservation chamber 22 through the second channel 82 .

[0047] To extract the heated air, it is only necessary to set an exhaust valve on the conduit of the heated air generating device, which can be used in conjunction with an exhaust pump to quickly exhaust the air.

[0048] When removing the heat-insulating sleeve connector 20: 1. Push the diverter block 72 to locate it in the lower section of the diverter inner cavity 71. At this time, the alignment ball 92 will extend into the first alignment concave surface 951, and the output inner hole 721 will only communicate with the first channel 81; 2. Connect the conduit on the heating generating device to the input pipe 73. The heating air can be sent to the two sub-gas connecting pipes 49 through the first channel 81 and the main gas connecting pipe 811. The heating air then enters the circular concave surface and pushes the inner moving block 46 to move inward. The locking contact block 44 moves inward accordingly and then disengages from the locking contact groove 311.

[0049] 3. After the two locking contact blocks 44 are separated from the corresponding locking contact grooves 311 , the panel 51 is pushed open and moves to the left, so that the annular top seat 12 and the thermal insulation sleeve seat 20 are quickly separated.

[0050] When removing the temperature measuring circuit board 231, 1. Push the diverter block 72 to make it located at the upper part of the diverter inner cavity 71. At this time, the alignment ball 92 will extend into the third alignment concave surface 953, and the output inner hole 721 will only be connected to the third channel 83; 2. Connect the conduit on the heating generating device to the input pipe 73. The heating can enter the sealed inner cavity 69 through the third channel 83. As the heating continues to enter, the isotropic axis 68 will move leftward, and the locking pressure block 63 will move leftward accordingly, and then disengage from the locking pressure groove 64. Then pull out the temperature measuring circuit board 231.

[0051] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A vacuum check valve, comprising a valve body (11); characterized in that: An annular top seat (12) is fixedly arranged on both sides of the upper end of the valve body (11); an insulating sleeve seat (20) is sleeved on the outer peripheral wall of the valve body (11); a side opening cavity (21) is opened inside the insulating sleeve seat (20); a first locking component is arranged inside the side opening cavity (21); when the insulating sleeve seat (20) is sleeved on the outer peripheral wall of the valve body (11) and docked with the annular top seat (12), the first locking component can automatically lock the insulating sleeve seat (20) on the annular top seat (12); The heat-insulating sleeve seat (20) is provided with a heat-insulating chamber (22) inside, and the heat-insulating chamber (22) is arranged around the valve body (11); The top of the thermal insulation socket (20) is provided with a top opening cavity (23), a temperature measuring circuit board (231) is inserted into the top opening cavity (23), and a temperature measuring sensor (232) is welded on the temperature measuring circuit board (231); a second locking component capable of automatically locking the temperature measuring circuit board (231) inserted into the top opening cavity (23) is provided in the thermal insulation socket (20); The insulation sleeve seat (20) is provided with a heating air diversion component inside, and the heating air diversion component is connected to an external heating air generating device, and can receive the heating air generated by the heating air generating device and output it to one of the three output channels; The three output channels are respectively connected to the first locking component, the heat preservation chamber (22) and the second locking component; the first locking component and the second locking component are both configured as pneumatic unlocking structures, and when the first locking component and the second locking component receive the heat generated by the heat generating device, they can respectively release the lock of the heat preservation socket (20) and the temperature measuring circuit board (231).

2. The air extraction check valve according to claim 1, characterized in that: When the number of the thermal insulation sleeve seat (20) is one, the thermal insulation sleeve seat (20) can be docked with the left side or the right side of the annular top seat (12); when the number of the thermal insulation sleeve seat (20) is two, the two thermal insulation sleeve seats (20) can be docked with the left side and the right side of the annular top seat (12) respectively; The left and right sides of the annular top seat (12) are fixedly provided with two horizontal extension sections (31) extending horizontally outward, and there is a gap between the two horizontal extension sections (31); the upper and lower walls of the side opening cavity (21) are provided with recessed notches (32), and after the thermal insulation sleeve (20) and the annular top seat (12) are docked, the two horizontal extension sections (31) will respectively extend into the corresponding recessed notches (32); the first locking component includes two locking sub-components separated from the upper and lower parts of the side opening cavity (21), and after the thermal insulation sleeve (20) and the annular top seat (12) are docked, the two locking sub-components can respectively contact and lock with the horizontal extension sections (31).

3. The air extraction check valve according to claim 2, characterized in that: The first locking member comprises a first locking inner shell (41), a locking inner hole extending vertically through the first locking inner shell (41), a through hole extending horizontally through the first locking inner shell (41), a closing shaft (42) passing through the through hole and dividing the locking inner hole into two sub-locking inner holes (43); the two locking sub-members each comprise a locking inner hole (43) movably arranged in the corresponding sub-locking inner holes (43); 3), the two locking contacts (44) are kept moving outward under normal conditions, the inner sides of the two horizontal extension sections (31) are provided with locking contact grooves (311), and the two sub-locking inner holes (43) are provided with first moving springs (45) for providing outward movement energy to the corresponding locking contacts (44), so that the two locking contacts (44) can move outwards and press into the corresponding locking contact grooves (311) respectively, so as to lock the two horizontal extension sections (31); The outer end of the locking contact block (44) is provided with an inner pressure inclined surface (441) which can be pressed inwards during the contact process with the corresponding horizontal extension section (31).

4. The air extraction check valve according to claim 3, characterized in that: An inner moving block (46) is also movably arranged in the locking sub-inner hole, and the inner moving block (46) is located on the inner side of the locking contact block (44). The inner moving block (46) and the locking contact block (44) are fixed by two vertical connecting shafts (47) respectively abutting against the left and right inner walls of the sub-locking inner hole (43), and the four form a whole that moves together; a fill-in limit block (48) is arranged in the space between the inner moving block (46) and the corresponding locking contact block (44), and the fill-in limit block (48) is fixed on the thermal insulation sleeve seat (20), and the two sides of the fill-in limit block (48) are respectively abutted against the inner sides of the two vertical connecting shafts (47), so as to divide the space between the inner moving block (46) and the corresponding locking contact block (44) into an outer sealing cavity and an inner sealing cavity respectively located on the outer side and the inner side of the fill-in limit block (48); The first dynamic spring (45) is arranged in the outer sealing cavity; After the locking contact block (44) is pressed into the corresponding locking contact groove (311), the inner moving block (46) will be pressed against the fill-in limit block (48) for limit; the inner moving block (46) and the fill-in limit block (48) are both provided with semicircular concave surfaces on the side facing each other, and when the inner moving block (46) and the fill-in limit block (48) are pressed against each other, the two semicircular concave surfaces will cooperate to form a circular concave surface, and the first locking inner shell (41) is provided with a sub-air pipe (49) which is respectively connected with the two semicircular concave surfaces and extends to the surface of the insulation sleeve seat (20).

5. The air extraction check valve according to claim 4, characterized in that: A first outwardly-expanded protrusion (481) is fixedly disposed on the outer side of the fill-in limiting block (48), and the first outwardly-expanded protrusion (481) can abut against the locking contact block (44), thereby preventing the first moving spring (45) from being crushed; A plurality of second outwardly expanding protrusions (411) are fixedly arranged on the left and right sides of the first locking inner shell (41).

6. The air extraction check valve according to claim 5, characterized in that: A push panel (51) and a retract panel (52) are fixedly arranged on both sides of the closing shaft (42), and a force groove (121) for the push panel (51) to be pressed into is provided on the left and right sides of the annular top seat (12); the push panel (51) and the retract panel (52) are respectively located on both sides of the first locking inner shell (41), and a second dynamic spring (53) is arranged between the push panel (51) and the first locking inner shell (41) to provide leftward movement energy for the push panel (51), and when the two locking contact blocks (44) are respectively separated from the corresponding locking contact grooves (311), the push panel (51) will move leftward, so that the annular top seat (12) and the thermal insulation sleeve seat (20) are quickly separated; The push-open panel (51) and the retracted panel (52) are respectively provided with recessed grooves (54) adapted to the second outwardly expanded protrusions (411).

7. The air extraction check valve according to claim 6, characterized in that: A vertical positioning shaft (24) is fixedly arranged in the top opening cavity (23); a positioning inner groove (25) for the positioning shaft (24) to extend into is provided at the lower end of the temperature measuring circuit board (231); the temperature measuring sensor (232) is welded directly below the temperature measuring circuit board (231); after the positioning shaft (24) extends into the bottom of the positioning inner groove (25), the temperature measuring sensor (232) will be in contact with the lower end wall of the top opening cavity (23); The heat preservation chamber (22) is located near the top opening (23); The second locking component comprises a second locking inner shell (61) fixed in the heat-insulating sleeve seat (20), the second locking inner shell (61) is located on the left side of the top opening (23), a horizontal inner cavity (62) is provided in the second locking inner shell (61), the right side of the horizontal inner cavity (62) is an opening, a locking pressure block (63) is movably provided in the horizontal inner cavity (62), the locking pressure block (63) keeps moving rightward under normal conditions, a locking pressure groove (64) is provided on the left side of the temperature measuring circuit board (231), and a third dynamic spring (65) is provided in the horizontal inner cavity (62) for providing rightward movement energy to the locking pressure block (63), thereby enabling the locking pressure block (63) to move rightward and be pressed into the locking pressure groove (64) to lock the temperature measuring circuit board (231); The right end of the locking pressure block (63) is provided with a left pressure inclined surface (631) which can be pressed to the left during the contact process with the temperature measuring circuit board (231).

8. The air extraction check valve according to claim 7, characterized in that: A lower end block (67) is fixedly arranged at the lower end of the locking pressure block (63); a sealing block (66) is fixedly arranged on the right side of the horizontal inner cavity (62); the lower end block (67) can be abutted against the sealing block (66) for limiting position; a through hole for the locking pressure block (63) to pass through is formed between the sealing block (66) and the upper wall of the horizontal inner cavity (62); A vertical isotropic axis (68) is fixedly arranged inside the lower end block (67), the upper end of the isotropic axis (68) extends into and is fixed in the locking pressure block (63), and the lower end is kept in contact with the lower wall of the horizontal inner cavity (62); a sealed inner cavity (69) is formed between the isotropic axis (68) and the sealing block (66), and an air connection hole (611) which is always connected to the sealed inner cavity (69) is opened at the lower end of the second locking inner shell (61).

9. The air extraction check valve according to claim 8, characterized in that: The heating air diversion component comprises a diversion inner cavity (71) provided in a heat preservation sleeve seat (20), a diversion block (72) being movably arranged in the diversion inner cavity (71), an output inner hole (721) extending to the right side wall of the diversion block (72) being arranged inside the diversion block (72), an input pipe (73) extending vertically to the diversion inner cavity (71) and communicating with the output inner hole (721) being fixedly arranged on the surface of the heat preservation sleeve seat (20), the input pipe (73) having a hard layer (731) on its outer periphery; and an activity area for the input pipe (73) to move is provided on the surface of the heat preservation sleeve seat (20); The three output channels are respectively a first channel (81), a second channel (82) and a third channel (83) opened in the heat preservation socket (20); the first channel (81) is provided with a mother air connection pipe (811) extending to the surface of the heat preservation socket (20); the mother air connection pipe (811) and the child air connection pipe (49) are connected via an external pipe; the second channel (82) is connected to the heat preservation chamber (22); and the third channel (83) is connected to the air connection hole (611); As the diverter block (72) moves, the output inner hole (721) in the diverter block (72) will be connected to one of the first channel (81), the second channel (82) and the third channel (83).

10. The air extraction check valve according to claim 9, characterized in that: An alignment inner cavity (91) is provided in the diverter block (72), the left side of the alignment inner cavity (91) is an opening, an alignment ball (92) and an alignment spring (93) are provided in the alignment inner cavity (91), the alignment spring (93) provides the alignment ball (92) with leftward movement energy, and a limiting section (94) is fixedly provided on the left side of the alignment inner cavity (91) to prevent the alignment ball (92) from completely detaching; a first alignment concave surface (951), a second alignment concave surface (952) and a third alignment concave surface (953) are provided on the left side wall of the diverter inner cavity (71) from bottom to top, and the alignment ball (92) is provided with a plurality of alignment concave surfaces (951), a plurality of alignment concave surfaces (952) and a plurality of alignment concave surfaces (953) in sequence; The alignment ball (92) can be inserted into one of the first alignment concave surface (951), the second alignment concave surface (952) and the third alignment concave surface (953) for alignment; when the alignment ball (92) is inserted into the first alignment concave surface (951), the output inner hole (721) is only connected to the first channel (81); when the alignment ball (92) is inserted into the second alignment concave surface (952), the output inner hole (721) is only connected to the second channel (82); when the alignment ball (92) is inserted into the third alignment concave surface (953), the output inner hole (721) is only connected to the third channel (83).

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