Circulating valve with novel structure

Abstract

The utility model provides a circulating valve with a novel structure, which relates to the technical field of valve structures and comprises a valve body, a plunger assembly, a sealing component and an air cylinder component, the valve body comprises a valve cavity, a water inlet cavity, a water outlet cavity and a balance cavity, the water inlet cavity, the water outlet cavity and the balance cavity are arranged from bottom to top, the plunger assembly comprises a plunger inserted into the valve cavity, and the plunger is connected with the balance cavity and the water inlet cavity. The sealing assembly is connected with the plunger and the valve cavity, so that the water inlet cavity, the water outlet cavity and the balance cavity are mutually independent; the air cylinder assembly is located above the valve body and connected with the plunger assembly. A plunger through hole is formed in the plunger in the axial direction of the plunger, an overflowing hole communicating the plunger through hole with the valve cavity is formed in the lower portion of the plunger, and the water inlet cavity communicates with the balance cavity. The outer diameter of the top of the plunger is larger than that of the bottom of the plunger. According to the single-cylinder circulating valve, the structure of the single-cylinder circulating valve is optimized, the high concentricity of the plunger, the valve rod on the plunger and the valve body on the plunger is guaranteed, the driving force of the cylinder assembly is reduced, and the reliability and the sealing performance of the circulating valve are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve structures, in particular to a novel structure circulating valve. Background Art

[0002] A circulating valve is a device used to control the flow of a medium. It regulates the opening and closing degree of a channel to achieve the regulation of flow rate and pressure, so as to keep the system running stably. The previous circulating valves did not have a balance chamber structure, and only relied on the drive of a cylinder to open and close the valve. However, it was often necessary to increase the area of the cylinder piston, resulting in a special structure of "big head and small body", which was not conducive to transportation, disassembly and assembly, and had a high cost. At present, some steel plants set a cylinder outside the valve body, and set a balance chamber between the cylinder and the valve stem. However, the connection structure is complex. It is not only necessary to ensure the sealed connection between the cylinder barrel and the valve body, but also necessary to increase the length of the valve stem and the positioning points of the product, resulting in difficulty in ensuring the concentricity of the connecting rod. Content of the Utility Model

[0003] To achieve the purpose of the utility model, the following technical solutions are adopted:

[0004] According to one aspect of the utility model, a novel structure circulating valve is provided. The novel structure circulating valve includes:

[0005] A valve body, including a valve chamber and a water inlet chamber, a water outlet chamber and a balance chamber communicating with the valve chamber. The water inlet chamber, the water outlet chamber and the balance chamber are arranged from bottom to top along the axial direction of the valve chamber;

[0006] A plunger assembly, including a plunger inserted into the valve chamber. The top of the plunger is located in the balance chamber, and the bottom of the plunger is inserted into the water inlet chamber.

[0007] A sealing assembly, connected between the plunger and the valve chamber to make the water inlet chamber, the water outlet chamber and the balance chamber independent of each other;

[0008] A cylinder assembly, located above the valve body and connected to the plunger assembly, for driving the plunger to move between an open position and a closed position;

[0009] Wherein, a plunger through hole is axially formed in the plunger, and a flow through hole communicating between the plunger through hole and the valve chamber is formed below the plunger. The water inlet chamber communicates with the balance chamber, and the water inlet chamber communicates with or disconnects from the water outlet chamber through the flow through hole;

[0010] The outer periphery of the plunger is a stepped structure, and the outer diameter of the top of the plunger is greater than the outer diameter of the bottom of the plunger.

[0011] According to an embodiment of the utility model, wherein, the plunger assembly further includes:

[0012] The valve stem is connected to the top of the plunger at one end and passes through the top of the valve body and is connected to the cylinder assembly at the other end;

[0013] The water passing ring is sleeved and threadedly connected between the plunger and the valve stem. The water passing ring is provided with a water passing hole along the axial direction of the plunger, and the water passing hole communicates with the plunger through hole and the balance cavity.

[0014] According to an embodiment of the present invention, a step is provided at the top of the plunger through hole, and the outer periphery of the water passing ring is threadedly connected to the step.

[0015] According to an embodiment of the present invention, the valve body is further provided with a pressure equalizing cavity communicating with the valve cavity. The pressure equalizing cavity is located between the water outlet cavity and the balance cavity, and the water inlet cavity, the water outlet cavity and the balance cavity are not communicated with the pressure equalizing cavity;

[0016] Wherein, a first channel is provided on the peripheral wall of the valve body at the position of the pressure equalizing cavity, and the first channel communicates the pressure equalizing cavity and the outside of the valve body.

[0017] According to an embodiment of the present invention, the sealing assembly includes a first seal, a second seal and a third seal sequentially arranged on the inner periphery of the plunger from bottom to top. Among them, the first seal is located between the water inlet cavity and the water outlet cavity, the second seal is connected between the water outlet cavity and the pressure equalizing cavity, and the third seal is connected between the pressure equalizing cavity and the balance cavity.

[0018] According to an embodiment of the present invention, the valve body is further connected with:

[0019] A valve cover, the top of which is connected to the top of the valve body, and the bottom of which is inserted into the valve cavity. The valve cover is provided with a valve cover through hole;

[0020] A gland, which is covered on the top of the valve cover through hole and is connected to the top of the valve cover;

[0021] A guide sleeve, the top of which abuts against the gland, and the bottom of which is inserted into the valve cover through hole;

[0022] Wherein, the gland is provided with a gland through hole corresponding to the valve cover through hole. The axes of the guide sleeve, the valve cover through hole and the gland through hole are collinear. The valve stem sequentially passes through the valve cover through hole, the guide sleeve and the gland through hole and extends to the outside of the valve body, and the valve stem can move up and down along the axis of the guide sleeve.

[0023] According to an embodiment of the present utility model, the guide sleeve includes a sleeve body and a stepped protrusion connected to the top of the sleeve body. A stepped groove corresponding to the stepped protrusion is formed at the bottom of the gland, and the stepped protrusion is inserted into the stepped groove.

[0024] According to an embodiment of the present utility model, first sealing rings are respectively arranged between the valve cover and the valve cavity, between the outer periphery of the guide sleeve and the valve cover through hole, between the guide sleeve and the valve stem, and between the gland and the valve stem.

[0025] According to an embodiment of the present utility model, the cylinder assembly includes:

[0026] A cylinder block, which is connected above the valve body through a flange;

[0027] A piston, which is slidably connected inside the cylinder block and divides the inside of the cylinder block into a lower cavity and an upper cavity;

[0028] A piston rod, the top of which is inserted into the inside of the cylinder block and connected to the piston, and the bottom of which is detachably connected to the top of the valve stem;

[0029] Wherein, the peripheral wall of the cylinder block is provided with a lower air inlet channel and an upper air inlet channel. The lower air inlet channel communicates with the lower cavity, and the upper air inlet channel communicates with the upper cavity.

[0030] According to an embodiment of the present utility model, a clamping member is connected between the piston rod and the valve stem. The clamping member includes a clamping block. A groove corresponding to the piston rod is formed in the clamping block, and an installation hole is formed at the bottom of the groove. The valve stem passes through the installation hole and is inserted into the groove;

[0031] Wherein, a limiting protrusion for limiting the piston rod is arranged on the inner wall of the groove, and a limiting groove corresponding to the limiting protrusion is formed on the outer periphery of the piston rod. The limiting protrusion is inserted into the limiting groove.

[0032] The present utility model has the following advantages or beneficial effects:

[0033] By arranging the balance cavity inside the valve body, the present utility model does not need to add new positioning points and guiding structures between the valve body and the plunger. The concentricity of the plunger, the valve stem thereon and the valve body is relatively high. And by using the stepped structure on the outer periphery of the plunger to balance the hydraulic pressure received by the plunger, the driving force of the cylinder assembly is greatly reduced, the special structure of the single cylinder is optimized, thereby improving the reliability and service life of the circulation valve, reducing the maintenance work, having a simple structure, good sealing performance and a long service life. Description of the Drawings

[0034] The above and other features and advantages of the present utility model will become more apparent by describing its exemplary embodiments in detail with reference to the accompanying drawings.

[0035] Figure 1 is a cross-sectional view of a novel structure circulation valve shown according to an exemplary embodiment.

[0036] Figure 2 is Figure 1 an enlarged view of part A in

[0037] Figure 3 is a cross-sectional view of a valve body shown according to an exemplary embodiment.

[0038] Figure 4 is a cross-sectional view of a plunger assembly shown according to an exemplary embodiment.

[0039] Figure 5 is a cross-sectional view of a cylinder assembly shown according to an exemplary embodiment.

[0040] Figure 6 is a schematic view of a clamping member shown according to an exemplary embodiment.

[0041] Among them, the reference numerals are explained as follows:

[0042] 1. Valve body; 11. Valve cavity; 12. Water inlet cavity; 121. Water inlet; 13. Water outlet cavity; 131. Water outlet; 14. Balance cavity; 15. Pressure equalizing cavity; 16. First channel;

[0043] 2. Plunger assembly; 21. Plunger; 210. Plunger through hole; 211. Flow through hole; 212. Step; 22. Valve rod; 23. Water passing ring; 231. Water passing hole;

[0044] 3. Sealing assembly; 31. First seal; 32. Second seal; 33. Third seal;

[0045] 4. Cylinder assembly; 41. Cylinder block; 410. Lower cavity; 411. Upper cavity; 412. Cylinder head; 413. Cylinder barrel; 414. Cylinder tail; 42. Piston; 43. Piston rod; 431. Limit groove; 44. Lower air inlet channel; 45. Upper air inlet channel; 46. Limit block; 47. Locking nut; 48. Lifting ring;

[0046] 5. Valve cover; 51. Valve cover through hole;

[0047] 6. Gland; 61. Step groove;

[0048] 7. Guide sleeve; 71. Sleeve body; 72. Step protrusion;

[0049] 8. First sealing ring;

[0050] 9. Flange;

[0051] 10. Clamping part; 101. Clamping block; 1011. Groove; 1012. Mounting hole; 1013. Limiting protrusion. Specific embodiments

[0052] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this utility model will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their detailed description will be omitted.

[0053] The terms "a", "an", "the", and "said" are used to denote the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to denote an open inclusive meaning and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc.

[0054] A new - type structure circulation valve according to an embodiment of the present utility model, the new - type structure circulation valve includes a valve body 1, a plunger assembly 2, a sealing assembly 3, and a cylinder assembly 4. The valve body 1 includes a valve cavity 11 and a water inlet cavity 12, a water outlet cavity 13, and a balance cavity 14 that communicate with the valve cavity 11. The water inlet cavity 12, the water outlet cavity 13, and the balance cavity 14 are arranged axially upward from bottom to top along the valve cavity 11. The plunger assembly 2 includes a plunger 21 inserted into the valve cavity 11, the top of the plunger 21 is located in the balance cavity, the bottom of the plunger 21 is inserted into the water inlet cavity 12, and the sealing assembly 3 is connected between the plunger 21 and the valve cavity 11 so that the water inlet cavity 12, the water outlet cavity 13, and the balance cavity 14 are independent of each other. The cylinder assembly 4 is located above the valve body 1 and is connected to the plunger assembly 2 for driving the plunger 21 to move between an open position and a closed position. Wherein, the plunger 21 is axially provided with a plunger through - hole 210, a flow - through hole 211 communicating the plunger through - hole 210 and the valve cavity 11 is provided below the plunger 21, the water inlet cavity 12 communicates with the balance cavity 14, and the water inlet cavity 12 communicates with or disconnects from the water outlet cavity 13 through the flow - through hole 211. The outer periphery of the plunger 21 is a stepped structure, and the outer diameter of the top of the plunger 21 is greater than the outer diameter of the bottom of the plunger 21.

[0055] In this application, the valve body 1 is also provided with a water inlet 121 communicating with the water inlet chamber 12 and a water outlet 131 communicating with the water outlet chamber 13. The water inlet direction of the water inlet 121 is inclined downward from outside to inside, and the water outlet direction of the water outlet 131 is inclined downward from inside to outside, so that the water outlet has a certain flow rate and pressure. The sealing assembly 3 is connected between the plunger 21 and the valve chamber 11, which can make the water inlet chamber 12, the water outlet chamber 13 and the balance chamber 14 independent of each other. Since the plunger 21 is axially provided with a plunger through hole 210, and a flow hole 211 communicating between the plunger through hole 210 and the valve chamber 11 is provided below the plunger 21, the water inlet chamber 12 and the balance chamber 14 are always communicated. In this application, the outer periphery of the plunger 21 is designed into a stepped structure, and the diameter of the top of the plunger 21 is larger than the diameter of the bottom of the plunger 21, so that the hydraulic pressures on the upper and lower parts of the plunger 21 can be kept balanced. In this way, when opening the valve, only the friction force between the plunger 21 and the valve body 1 needs to be overcome, which greatly reduces the driving force of the cylinder assembly 4 during the opening and closing of the valve and improves the convenience of opening and closing the valve. In addition, in this application, only the balance chamber 14 is provided inside the valve body 1, without adding a positioning point between the valve body 1 and the valve rod 22, and the concentricity of the valve rod 22 and the valve body 1 is relatively high. In the prior art, not only the seal between the external balance chamber and the outside of the valve body 1 needs to be added, but also the guidance and seal between the external balance chamber and the valve rod 22 need to be added. More sealing points are likely to cause leakage problems. Moreover, only one sealing point needs to be added between the valve body 1 and the plunger 21 in this application. This application optimizes the special structure of the single cylinder, thereby improving the reliability and service life of the circulation valve, reducing the maintenance work, having a simple structure, good sealing performance and a long service life. It should be noted that the single cylinder valve in this application is a valve with only a cylinder and no balance chamber. Water is not limited to flowing liquids such as tap water, pure water, and turbid circulating water, and can also be used for gases, which is not restricted again in this application.

[0056] When the valve is opened, that is, when the plunger 21 moves upward, the water in the water inlet chamber 12 enters the balance chamber 14 through the water inlet channel on the plunger 21. In this way, the balance chamber 14 can generate a downward hydraulic pressure on the plunger 21 to balance the upward hydraulic pressure at the bottom of the plunger 21. As the plunger 21 moves upward, the flow hole 211 enters the water outlet chamber 13, and the water inlet chamber 12 and the water outlet chamber 13 are communicated. The water in the water inlet chamber 12 can enter the water outlet chamber 13 and be discharged from the water outlet 131, realizing the opening of the valve. When the cylinder assembly 4 drives the plunger 21 to move upward to the maximum stroke, the valve is opened to the maximum. When the valve needs to be closed, the cylinder assembly 4 drives the plunger 21 to move downward. As the flow hole 211 completely leaves the water outlet chamber 13, the water inlet chamber 12 and the water outlet chamber 13 are disconnected.

[0057] In a preferred embodiment of the present invention, as Figure 1-2The plunger assembly 2 shown in FIGS. 3 and 4 further includes a valve stem 22 and a water-passing ring 23. One end of the valve stem 22 is connected to the top of the plunger 21, and the other end of the valve stem 22 passes through the top of the valve body 1 and is connected to the cylinder assembly 4. The water-passing ring 23 is sleeved and threadedly connected between the plunger 21 and the valve stem 22. The water-passing ring 23 is axially provided with a water-passing hole 231 along the plunger 21, and the water-passing hole 231 communicates with the plunger through-hole 210 and the balance chamber 14. The water-passing ring 23 can be used to fix the valve stem 22, and the structure of the apertures of the plurality of water-passing holes 231 provided thereon is reasonably distributed through fluid analysis, which can not only control the water inlet speed from the plunger through-hole 210 to the balance chamber 14, but also keep the upper and lower liquid pressures of the plunger 21 balanced all the time. In addition, in the present application, both between the water-passing ring 23 and the valve stem 22 and between the water-passing ring 23 and the plunger 21 are threadedly connected and then welded, improving the sealing performance, overall strength and service life of the plunger assembly 2.

[0058] Preferably, the plunger 21 is provided with a chamfer to reduce damage to the sealing assembly 3 and enhance the accuracy of pressure regulation. In addition, the structure of the aperture of the plunger 21 in the present application is designed through fluid analysis, effectively reducing the hydraulic resistance during the opening and closing process of the valve and facilitating the opening of the valve.

[0059] In a preferred embodiment of the present invention, as Figure 1-2 shown in FIGS. 3 and 4, a step 212 is provided at the top of the plunger through-hole 210, and the outer periphery of the water-passing ring 23 is threadedly connected to the step 212. The step 212 can limit and fix the water-passing ring 23.

[0060] In a preferred embodiment of the present invention, as Figure 1-3 shown, the valve body 1 is further provided with a pressure equalizing chamber 15 communicating with the valve chamber 11. The pressure equalizing chamber 15 is located between the water outlet chamber 13 and the balance chamber 14, and the water inlet chamber 12, the water outlet chamber 13 and the balance chamber 14 are not communicated with the pressure equalizing chamber 15. Wherein, a first channel 16 is provided on the peripheral wall of the valve body 1 at the pressure equalizing chamber 15, and the first channel 16 communicates the pressure equalizing chamber 15 and the outside of the valve body 1. Through the pressure equalizing chamber 15 and the first channel 16, the inside of the valve body 1 is communicated with the outside world, realizing the smooth operation of the valve. In addition, there is no liquid in the pressure equalizing chamber 15 under normal conditions. If any of the sealing assemblies 3 in the water outlet chamber 13 and the balance chamber 14 has a problem, the liquid will enter the pressure equalizing chamber 15 and the first channel 16 and then flow out of the valve body 1. Therefore, the pressure equalizing chamber 15 and the first channel 16 can also be used for detecting the sealing performance and ensuring real-time feedback of the sealing detection.

[0061] In a preferred embodiment of the present invention, as Figure 1 shown in FIGS. 3 3The shown sealing assembly 3 includes a first seal 31, a second seal 32, and a third seal 33 that are sequentially arranged on the inner circumference of the plunger 21 from bottom to top. Among them, the first seal 31 is located between the water inlet chamber 12 and the water outlet chamber 13, the second seal 32 is connected between the water outlet chamber 13 and the pressure equalizing chamber 15, and the third seal 33 is connected between the pressure equalizing chamber 15 and the balance chamber 14. Among them, the first seal 31, the second seal 32, and the third seal 33 can be elastic sealing rings such as sealing washers. By providing mounting grooves corresponding to the first seal 31, the second seal 32, and the third seal 33 on the inner wall of the valve chamber 11, the fixation of the first seal 31, the second seal 32, and the third seal 33 and the valve body 1 is realized, and the structure is simple and the processing is convenient.

[0062] In a preferred embodiment of the present utility model, as Figure 1-3 shown, the valve body 1 is further connected with a valve cover 5, a gland 6, and a guide sleeve 7. The top of the valve cover 5 is connected to the top of the valve body 1, and the bottom is inserted into the valve chamber 11. The valve cover 5 is provided with a valve cover through hole 51; the gland 6 covers the top of the valve cover through hole 51 and is connected to the top of the valve cover 5; the top of the guide sleeve 7 abuts against the gland 6, and the bottom of the guide sleeve 7 is inserted into the valve cover through hole 51; among them, the gland 6 is provided with a gland through hole corresponding to the valve cover through hole 51, and the axes of the guide sleeve 7, the valve cover through hole 51, and the gland through hole are collinear. The valve stem 22 sequentially passes through the valve cover through hole 51, the guide sleeve 7, and the gland through hole and extends to the outside of the valve body 1, and the valve stem 22 can move up and down along the axis of the guide sleeve 7. In this application, the valve cover 5, the guide sleeve 7, and the gland 6 are sequentially connected to the top of the valve body 1 from bottom to top. Among them, the valve cover 5 is evenly distributed with twelve circular stud holes, and correspondingly, the valve body 1 is provided with threaded holes. The valve cover 5 and the valve body 1 are connected by screws and spring washers. The gland 6 is provided with a chamfer. The gland 6 abuts against the guide sleeve 7. The gland 6 is evenly distributed with eight circular counterbore holes, and correspondingly, the valve cover 5 is provided with threaded holes. The gland 6 and the valve cover 5 are connected by screws and spring washers. The axes of the guide sleeve 7, the valve cover through hole 51, and the gland through hole are collinear. The valve stem 22 sequentially passes through the valve cover through hole 51, the guide sleeve 7, and the gland through hole and extends to the outside of the valve body 1, and the valve stem 22 can move linearly up and down along the axis of the guide sleeve 7, effectively reducing the eccentric wear phenomenon between the valve stem 22 and the guide sleeve 7, optimizing the structure of the single-cylinder cycle, thereby improving the reliability and service life of the cycle valve and reducing the maintenance work

[0063] In a preferred embodiment of the present utility model, as Figure 1-2The shown guide sleeve 7 includes a sleeve body 71 and a stepped projection 72 connected to the top of the sleeve body 71. A stepped groove 61 corresponding to the stepped projection 72 is provided at the bottom of the gland 6, and the stepped projection 72 is inserted into the stepped groove 61. Through the cooperation of the stepped projection 72 and the stepped groove 61, the limit and fixation of the gland 6 and the guide sleeve 7 are realized. During installation, only the gland 6 and the valve body 1 need to be connected, which simplifies the installation process.

[0064] In a preferred embodiment of the present utility model, as Figure 1-2 shown, a first sealing ring 8 is respectively provided between the valve cover 5 and the valve cavity 11, between the outer periphery of the guide sleeve 7 and the valve cover through-hole 51, between the guide sleeve 7 and the valve stem 22, and between the gland 6 and the valve stem 22. First sealing grooves for installing the first sealing ring 8 are respectively provided on the inner periphery of the gland 6, and on the outer and inner peripheries of the guide sleeve 7, so that the gland 6 and the valve stem 22 form a releasable sealing connection through the first sealing ring 8, the inner periphery of the guide sleeve 7 and the valve stem 22 form a releasable sealing connection through the first sealing ring 8, the valve cover 5 and the valve cavity 11 are sealed, the outer periphery of the guide sleeve 7 and the valve cover through-hole 51 are sealed, and the gland 6 and the guide sleeve 7 also seal the inner periphery of the valve stem 22, effectively improving the sealing performance of the entire valve body 1.

[0065] Preferably, the guide sleeve 7 is provided with a chamfer to reduce damage to the first sealing ring 8; the inner hole of the valve cover 5 is provided with a stepped step so that the bottom of the inner hole of the valve cover 5 matches the top of the valve cavity 11, the inner hole of the valve cover 5 matches the outer periphery of the guide sleeve 7, and the inner periphery of the guide sleeve 7 matches the outer periphery of the valve stem 22, thereby improving the sealing performance of the valve.

[0066] In a preferred embodiment of the present utility model, as Figure 1 、 5 and as shown in 6, the cylinder assembly 4 includes a cylinder body 41, a piston 42 and a piston rod 43. The cylinder body 41 is connected above the valve body 1 through a flange 9. The piston 42 is slidably connected inside the cylinder body 41 and divides the inside of the cylinder body 41 into an upper cavity 411 and a lower cavity 410; the top of the piston rod 43 is inserted into the inside of the cylinder body 41 and connected to the piston 42, and the bottom of the piston rod 43 is detachably connected to the top of the valve stem 22; wherein, an air inlet channel 44 and an upper air inlet channel 45 are provided on the peripheral wall of the cylinder body 41. The lower air inlet channel 44 communicates with the lower cavity 410, and the upper air inlet channel 45 communicates with the upper cavity 411. In this application, the flange 9 is connected to the valve body bolt at the top of the valve body 1, and the connection is welded. And a bolt step corresponding to the flange 9 is provided at the top of the valve body bolt, ensuring the coaxiality of each part during the assembly process.

[0067] When the valve moves upward, compressed air enters the lower cavity 410 below the piston 42 through the lower air inlet passage 44. The air in the upper cavity 411 above the piston 42 enters the atmosphere through the air inlet passage 45 on the cylinder tail 414. The compressed air in the cylinder acts on the piston 42 to generate the maximum thrust of the cylinder, causing the piston rod 43 to drive the plunger 21 upward and the valve to open. When the valve moves downward, compressed air enters the upper cavity 411 through the air inlet passage 45 on the cylinder tail 414, and the air in the lower cavity 410 enters the atmosphere through the lower air inlet passage 44. The compressed air in the cylinder acts on the piston 42 to generate the maximum thrust of the cylinder, causing the piston rod 43 and the plunger 21 to move downward and the valve to close. The product has a simple structure, is easy to use, and features a fast response speed and stable load.

[0068] Preferably, the cylinder block 41 further includes a cylinder head 412, a cylinder barrel 413, and a cylinder tail 414 that are connected in sequence from bottom to top. The cylinder head 412 has a "work" - shaped structure. The cylinder head 412 is provided with a lower air inlet passage 44 connected to the air source device, and the cylinder tail 414 is provided with an upper air inlet passage 45 connected to the air source device. Four circular holes are evenly distributed at the lower end of the cylinder head 412. Similarly, the valve cover 5 is provided with corresponding first threaded holes, and the cylinder assembly 4 and the valve cover 5 are connected by connecting bolts and nuts. Four circular counter - sunk holes are evenly distributed on the cylinder tail 414. Similarly, the cylinder head 412 is provided with corresponding second threaded holes, and the cylinder tail 414 is integrally connected to the cylinder head 412 through connecting bolts, nuts, and spring washers.

[0069] Preferably, the upper end of the cylinder barrel 413 is hermetically connected to the cylinder head 412 through a second sealing ring. The inner cavity of the cylinder head 412 and the piston rod 43 are detachably hermetically connected through a third sealing ring. The piston 42 and the piston rod 43 are detachably hermetically connected through a fourth sealing ring. The inner cavity of the cylinder tail 414 and the piston rod 43 are detachably hermetically connected through a fifth sealing ring. Among them, the cylinder head 412 is provided with a second sealing groove corresponding to the second sealing ring, a third sealing groove corresponding to the third sealing ring, the piston 42 is provided with a fourth sealing groove corresponding to the fourth sealing ring, and the inner cavity of the cylinder tail 414 is provided with a fifth sealing groove corresponding to the fifth sealing ring.

[0070] Preferably, the upper end of the piston rod 43 passes through the cylinder tail 414, and a limit block 46 for limiting it is connected to the top of the piston rod 43. The limit block 46 is fixedly connected to the top of the piston rod 43 through a limit screw. A stepped step is provided in the middle of the piston rod 43. The piston 42 is connected to the lower step surface of the stepped step, and a locking nut 47 is connected to the upper step surface of the stepped step. A ventilation hole is opened at the lower end of the locking nut 47 to increase the acting force on the piston 42.

[0071] Preferably, the piston 42 and the cylinder tail 414 are respectively provided with chamfers to reduce damage to the seals.

[0072] Preferably, a threaded hole is provided on the upper end surface of the cylinder tail 414, and the cylinder tail 414 and the lifting ring 48 are connected by threads.

[0073] In a preferred embodiment of the present utility model, as Figure 1 , 5 and 6, a clamping member 10 is connected between the bottom of the piston rod 43 and the top of the valve rod 22. The clamping member 10 includes a clamping block 101. The clamping block 101 is provided with a groove 1011 corresponding to the piston rod 43. An installation hole 1012 is provided at the bottom of the groove 1011. The valve rod 22 passes through the installation hole 1012 and is inserted into the groove 1011. Among them, a limiting protrusion 1013 for limiting the piston rod 43 is provided on the inner wall of the groove 1011. A limiting groove 431 corresponding to the limiting protrusion 1013 is provided on the outer circumference of the piston rod 43. The limiting protrusion 1013 is inserted into the limiting groove 431. Through the cooperation of the limiting protrusion 1013 and the limiting groove 431, the present application realizes the fixed connection between the piston 42 and the piston rod 43, facilitating the opening and closing actions of the valve.

[0074] In the embodiments of the present utility model, the term "a plurality of" refers to two or more, unless otherwise clearly defined. Terms such as "installation", "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0075] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the embodiments of the present utility model.

[0076] In the description of this specification, the description of terms such as "one embodiment", "one preferred embodiment", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0077] The above are only the preferred embodiments of the embodiments of the present utility model and are not intended to limit the embodiments of the present utility model. For those skilled in the art, various modifications and changes can be made to the embodiments of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present utility model shall be included within the protection scope of the embodiments of the present utility model.

Claims

1. A new type of structure circulation valve, characterized in that: include: A valve body (1) comprises a valve cavity (11) and a water inlet cavity (12), a water outlet cavity (13) and a balance cavity (14) which are connected to the valve cavity (11), wherein the water inlet cavity (12), the water outlet cavity (13) and the balance cavity (14) are arranged from bottom to top along the axial direction of the valve cavity (11); The plunger assembly (2) comprises a plunger (21) inserted into the valve cavity (11), the top of the plunger (21) being located in the balance cavity, and the bottom of the plunger (21) being inserted into the water inlet cavity (12). A sealing assembly (3) connected between the plunger (21) and the valve chamber (11) so that the water inlet chamber (12), the water outlet chamber (13), and the balance chamber (14) are independent of each other; A cylinder assembly (4), located above the valve body (1) and connected to the plunger assembly (2), for driving the plunger (21) to move between an open position and a closed position; The plunger (21) is provided with a plunger through hole (210) along its axial direction, a flow hole (211) communicating between the plunger through hole (210) and the valve chamber (11) is provided below the plunger (21), the water inlet chamber (12) is communicated with the balance chamber (14), and the water inlet chamber (12) is connected to or disconnected from the water outlet chamber (13) through the flow hole (211); The outer periphery of the plunger (21) is a step structure, and the outer diameter of the top of the plunger (21) is greater than the outer diameter of the bottom of the plunger (21).

2. The novel structure circulation valve according to claim 1 is characterized in that: The plunger assembly (2) further comprises: A valve stem (22), one end of which is connected to the top of the plunger (21), and the other end of which passes through the top of the valve body (1) and is connected to the cylinder assembly (4); A water-passing ring (23) is sleeved and threadedly connected between the plunger (21) and the valve stem (22); the water-passing ring (23) is provided with a water-passing hole (231) along the axial direction of the plunger (21); the water-passing hole (231) is connected with the plunger through hole (210) and the balancing chamber (14).

3. The novel structure circulation valve according to claim 2 is characterized in that: A step (212) is provided at the top of the plunger through hole (210), and the outer periphery of the water-passing ring (23) is threadedly connected to the step (212).

4. The novel structure circulation valve according to claim 1 is characterized in that: The valve body (1) is further provided with a pressure equalizing chamber (15) connected to the valve chamber (11); the pressure equalizing chamber (15) is located between the water outlet chamber (13) and the balance chamber (14); and the water inlet chamber (12), the water outlet chamber (13) and the balance chamber (14) are not connected to the pressure equalizing chamber (15); Wherein, a first channel (16) is provided on the peripheral wall of the valve body (1) located at the pressure equalizing chamber (15), and the first channel (16) communicates with the pressure equalizing chamber (15) and the outside of the valve body (1).

5. The novel structure circulation valve according to claim 4 is characterized in that: The sealing assembly (3) comprises a first sealing member (31), a second sealing member (32) and a third sealing member (33) which are arranged on the inner periphery of the plunger (21) from bottom to top, wherein the first sealing member (31) is located between the water inlet chamber (12) and the water outlet chamber (13), the second sealing member (32) is connected between the water outlet chamber (13) and the pressure equalizing chamber (15), and the third sealing member (33) is connected between the pressure equalizing chamber (15) and the balance chamber (14).

6. The novel structure circulation valve according to claim 2 is characterized in that: The valve body (1) is also connected with: A valve cover (5), the top of which is connected to the top of the valve body (1), and the bottom of which is inserted into the valve cavity (11), and the valve cover (5) is provided with a valve cover through hole (51); A gland (6) is disposed on the top of the valve cover through hole (51) and is connected to the top of the valve cover (5); A guide sleeve (7), the top of which abuts against the gland (6) and the bottom of which is inserted into the valve cover through hole (51); The gland (6) is provided with a gland through hole corresponding to the valve cover through hole (51); the axes of the guide sleeve (7), the valve cover through hole (51) and the gland through hole are collinear; the valve stem (22) sequentially passes through the valve cover through hole (51), the guide sleeve (7) and the gland through hole and extends to the outside of the valve body (1); and the valve stem (22) can move up and down along the axis of the guide sleeve (7).

7. The novel structure circulation valve according to claim 6 is characterized in that: The guide sleeve (7) comprises a sleeve body (71) and a step protrusion (72) connected to the top of the sleeve body (71); a step groove (61) corresponding to the step protrusion (72) is formed at the bottom of the pressure cover (6); and the step protrusion (72) is inserted into the step groove (61).

8. The novel structure circulation valve according to claim 6 is characterized in that: A first sealing ring (8) is respectively provided between the valve cover (5) and the valve cavity (11), between the outer periphery of the guide sleeve (7) and the valve cover through hole (51), between the guide sleeve (7) and the valve stem (22), and between the pressure cover (6) and the valve stem (22).

9. The novel structure circulation valve according to claim 2 is characterized in that: The cylinder assembly (4) comprises: A cylinder body (41) is connected to the upper part of the valve body (1) via a flange (9); A piston (42) is slidably connected to the interior of the cylinder (41) and divides the interior of the cylinder (41) into a lower cavity (410) and an upper cavity (411); A piston rod (43), the top of which is inserted into the cylinder (41) and connected to the piston (42), and the bottom of which is detachably connected to the top of the valve stem (22); The peripheral wall of the cylinder body (41) is provided with a lower air intake channel (44) and an upper air intake channel (45); the lower air intake channel (44) is connected to the lower cavity (410), and the upper air intake channel (45) is connected to the upper cavity (411).

10. The novel structure circulation valve according to claim 9 is characterized in that: A clamping member (10) is connected between the piston rod (43) and the valve stem (22), the clamping member (10) comprising a clamping block (101), the clamping block (101) being provided with a groove (1011) corresponding to the piston rod (43), a mounting hole (1012) being provided at the bottom of the groove (1011), the valve stem (22) passing through the mounting hole (1012) and being inserted into the groove (1011); The inner wall of the groove (1011) is provided with a limiting protrusion (1013) for limiting the piston rod (43), the outer periphery of the piston rod (43) is provided with a limiting groove (431) corresponding to the limiting protrusion (1013), and the limiting protrusion (1013) is inserted into the limiting groove (431).

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