A bidirectional seal control valve seat

Abstract

The application provides a bidirectional sealing control valve seat, and relates to the field of control valves, which comprises a valve body, a linkage plate, an inner sealing cover and a cleaning structure; the bottom of the valve body is provided with a lower sealing cylinder, the inner sealing cover is installed in a second inner cylinder on the inner side of the lower sealing cylinder, the bottom end of the lower sealing cylinder is further provided with four groups of blow-off holes, a flow channel is arranged between the water inlet end and the water outlet end in the valve body, and a valve core is installed in the flow channel; the valve core is a cylindrical structure with a closed top end and an open bottom end, an upper threaded hole is arranged in the middle of the top of the valve core, the valve core is screwed to the bottom side of the linkage plate through the threaded hole, the cleaning structure is further installed in the valve body, and a cleaning plate of the cleaning structure is arranged in the valve core; when the valve is closed, the water outlet hole of the valve core is cleaned by the brush, and the sewage in the valve core is discharged by pulling the cleaning operation shaft, so that the valve can be cleaned without being disassembled, and the problems that the water needs to be cut off and the valve needs to be disassembled when the filter screen is cleaned are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of control valves, in particular to a bidirectional sealing control valve seat. BACKGROUND

[0002] The control valve is composed of two main assemblies: the valve body assembly and the actuator assembly (or actuator system), which is the final control element for changing process parameters such as medium flow, pressure, temperature, liquid level, etc. by means of power operation.

[0003] As in the patent with application number: CN202122397300.6, a whole bidirectional sealing ball valve seat in the field of ball valves is disclosed, which comprises a valve seat body, the number of valve seat bodies is two, the valve seat body comprises: a flow-through pipe, a flange plate, a connecting plate and a groove, the flow-through pipe is provided with a flange plate at one end, the flow-through pipe is provided with a connecting plate at the other end, the connecting plate is provided with a groove, the two valve seat bodies are connected with a self-sealing device, the self-sealing device comprises: a sealing ring and a compression spring, the sealing ring is in the shape of a ring, the diameter of the sealing ring is the same as the diameter of the groove, a plurality of compression springs are installed on one side of the sealing ring, the compression springs are connected with the inner wall of the groove, the two valve seat bodies are fixed through fastening bolts, and a filter device is installed in each valve seat body.

[0004] The present application has good sealing performance and facilitates water filtration.

[0005] At present, the valve core of the traditional control valve usually only controls the flow of water, and when the valve is used for filtering water, a filter screen is usually installed at both ends of the valve. When cleaning the filter screen, the water needs to be cut off and the valve needs to be disassembled, which is relatively troublesome to operate. SUMMARY

[0006] Therefore, the present application provides a bidirectional sealing control valve seat, when the valve is closed, the brush bristles are rotated to clean the water outlet hole of the valve core, and the sewage in the valve core is discharged by pulling the cleaning operation shaft, so that cleaning can be realized without disassembling the valve.

[0007] The present application provides a bidirectional sealing control valve seat, which specifically comprises: a valve body, a linkage plate, an inner sealing cover and a cleaning structure.

[0008] The bottom of the valve body is provided with a lower sealing cylinder, the bottom end of the lower sealing cylinder extends downwardly beyond the bottom end of the valve body, and the inner diameter of the lower sealing cylinder decreases from bottom to top, and is sequentially divided into a first inner cylinder, a second inner cylinder and a third inner cylinder, and an inner sealing cover is installed in the second inner cylinder on the inner side of the lower sealing cylinder, the outer diameter of the inner sealing cover is smaller than the inner diameter of the second inner cylinder on the inner side of the lower sealing cylinder and larger than the inner diameter of the third inner cylinder on the inner side of the lower sealing cylinder, the bottom end of the lower sealing cylinder is further provided with four groups of blowdown holes, a threaded cylinder is threadedly connected in the top port of the valve body, and the threaded cylinder is sealed by a nut and a rubber pad, the linkage plate is a conical frustum structure, the bottom middle of the linkage plate is provided with a threaded column, the top of the linkage plate is provided with two groups of opposite L-shaped clamping plates, the middle of the threaded cylinder is further threadedly connected with a valve rod, the bottom of the valve rod is provided with a circular lower clamping plate, and the lower clamping plate is clamped between the two groups of opposite L-shaped clamping plates, a flow passage is arranged between the water inlet end and the water outlet end in the valve body, the inner diameter of the flow passage decreases from top to bottom, and is sequentially divided into an upper passage and a lower passage, and a valve core is installed in the flow passage, the valve core is a cylindrical structure with a closed top end and an open bottom end, the top middle of the valve core is provided with an upper threaded hole, and the valve core is threadedly connected to the bottom side of the linkage plate, a cleaning structure is further installed in the valve body, and a cleaning plate of the cleaning structure is arranged in the valve core.

[0009] Optionally, the outer side of the valve core is further provided with an upper retaining ring, the outer diameter of the upper retaining ring is the same as the inner diameter of the upper passage of the flow passage, the upper end of the valve core is sleeved with an upper sealing ring, the upper sealing ring is attached to the upper side of the upper retaining ring, and the outer diameter of the upper sealing ring is also the same as the inner diameter of the upper passage of the flow passage, the valve core is further provided with a small water outlet hole, and the small water outlet hole is arranged on the lower side of the upper retaining ring.

[0010] Optionally, the outer side diameter of the lower end of the valve core is smaller than the outer side diameter of the upper end, and the lower end is sleeved with a lower sealing ring, and the outer diameter of the lower sealing ring is the same as the inner diameter of the lower passage of the flow passage and the inner diameter of the third inner cylinder on the inner side of the lower sealing cylinder.

[0011] Optionally, the bottom of the valve core is further connected with a lower retaining ring, the inner side of the lower retaining ring is provided with four groups of inner connecting blocks one, the inner hexagonal bolt holes are arranged on the inner connecting blocks one, the inner side of the bottom of the valve core is further provided with four groups of inner connecting blocks two, the inner threaded holes are arranged on the inner connecting blocks two, the lower retaining ring is connected to the valve core through the inner hexagonal bolt holes on the four groups of inner connecting blocks one and the inner threaded holes on the four groups of inner connecting blocks two in an upper-lower opposite manner through inner hexagonal bolts, and the outer diameter of the lower retaining ring is the same as the outer diameter of the lower sealing ring.

[0012] Optionally, an outer sealing ring is sleeved on the outer ring of the inner sealing cover, and the outer sealing ring is tightly attached to the inner wall of the second inner cylinder on the inner side of the lower sealing cylinder, a spring is further arranged between the inner side of the inner sealing cover and the bottom of the lower sealing cylinder, an upper sealing plate is attached to the top of the inner sealing cover, the outer diameter of the upper sealing plate is larger than the inner diameter of the third inner cylinder on the inner side of the lower sealing cylinder, and the outer diameter of the upper sealing plate is smaller than the inner diameter of the third inner cylinder on the inner side of the lower sealing cylinder, and a through hole is arranged in the middle of the upper sealing plate.

[0013] Optionally, the cleaning structure further comprises a cleaning operation shaft, a baffle, an upper cleaning column, a cleaning plate and bristles.

[0014] The cleaning operation shaft is movably inserted into the bottom end of the lower sealing cylinder, and a baffle is connected to the upper end of the inner sealing cover through the inner sealing cover, and the thickness of the baffle is less than the thickness of the upper sealing plate, and the baffle is arranged in the through hole in the middle of the upper sealing plate and is attached to the top end surface of the inner sealing cover, the cleaning plate is provided with six groups, and is uniformly connected to the outer wall of the upper cleaning column, and the outer ends of the six groups of cleaning plates are respectively connected with bristles, and the bristles are attached to the inner wall of the valve core, the upper cleaning column is fixedly connected to the top end of the cleaning operation shaft, and the bottom end of the cleaning operation shaft is further provided with an operation hand wheel.

[0015] Optionally, the inner side bottom of the inner sealing cover is further provided with a fixing cylinder, and the cleaning operation shaft is rotatably inserted into the fixing cylinder and is sealed by a mechanical seal.

[0016] Optionally, when the valve body is sealed, the upper end of the valve core is arranged in the flow-through channel, the lower end of the valve core is inserted into the lower sealing cylinder, the outer wall of the upper sealing ring is tightly attached to the upper passage of the flow-through channel, the outer wall of the lower sealing ring is tightly attached to the third inner cylinder on the inner side of the lower sealing cylinder, the lower baffle ring is arranged in the second inner cylinder on the inner side of the lower sealing cylinder, the upper sealing plate is attached to the bottom side of the lower baffle ring, and the outer end of the bristle is opposite to the micro water outlet hole.

[0017] Optionally, when the valve core is opened upward, the upper end of the lower sealing ring is just inserted into the lower passage of the flow-through channel, and the lower end of the sealing ring has not yet been separated from the third inner cylinder on the inner side of the lower sealing cylinder.

[0018] Optionally, after the valve body is opened, the top end of the L-shaped clamping plate is attached to the bottom side of the threaded cylinder, the micro water outlet hole is completely leaked out of the flow-through channel, the lower end of the valve core rises into the lower passage of the flow-through channel, and the outer wall of the lower sealing ring is tightly attached to the inner side of the lower passage of the flow-through channel.

[0019] Beneficial effects

[0020] When the valve is closed, the bristles are driven by rotating the cleaning operation shaft to clean the water outlet hole of the valve core, and the sewage in the valve core is discharged by pulling the cleaning operation shaft, so that cleaning can be realized without disassembling the valve.

[0021] In addition, the lower sealing cylinder and the cleaning structure are arranged, when the valve body is closed and the bottom end of the upper blocking ring is attached to the upper passage bottom end of the flow passage, the outer wall of the upper sealing ring at the upper end of the valve core is attached to the upper passage of the flow passage, the outer wall of the lower sealing ring at the lower end of the valve core is attached to the third inner cylinder inside the lower sealing cylinder, and the lower blocking ring is arranged in the second inner cylinder inside the lower sealing cylinder, the upper sealing plate is attached to the bottom side of the lower blocking ring, the flow passage and the lower sealing cylinder are bidirectionally sealed, at this time, the tiny water outlet hole is arranged in the flow passage, and thus water at both ends of the valve body cannot flow into the valve core, the outer end of the brush is opposite to the tiny water outlet hole, the cleaning plate and the brush can clean the tiny water outlet hole of the valve core by rotating the cleaning operation shaft, and by pulling down the cleaning operation shaft, the inner sealing cover is driven to move downward synchronously by the blocking plate, when the outer sealing ring on the inner sealing cover is separated from the second inner cylinder and enters the first inner cylinder, the third inner cylinder bottom end of the lower sealing cylinder is no longer sealed, and thus impurities at the tiny water outlet hole of the valve core and water remaining in the valve core can flow downward through the drain hole, and the valve core can be cleaned without disassembling the control valve, and the operation is relatively convenient.

[0022] In addition, when the valve is opened and the top end of the L-shaped clamping plate is attached to the bottom side of the threaded cylinder, the tiny water outlet hole leaks out of the flow passage completely, the lower end of the valve core rises into the lower passage of the flow passage, and the outer wall of the lower sealing ring is attached to the inner side of the lower passage of the flow passage, the flow passage is sealed by the lower sealing ring, water flows through the inner side of the valve core and flows through the tiny water outlet hole, so that impurities in the water can be blocked by the tiny water outlet hole on the valve core, and the upper sealing plate on the inner sealing cover is attached to the bottom of the third inner cylinder under the action of the spring, the bottom of the third inner cylinder is sealed, the cleaning operation shaft and the fixed cylinder of the inner sealing cover are sealed by mechanical sealing, and the outer sealing ring outside the inner sealing cover is attached to the second inner cylinder to improve the sealing effect and prevent water from flowing out of the drain hole of the lower sealing cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below.

[0024] The drawings in the following description only relate to some embodiments of the present application, and are not limited to the present application.

[0025] In the drawings:

[0026] Figure 1 A schematic diagram of the overall structure according to an embodiment of the present application is shown;

[0027] Figure 2 A schematic diagram of the structure after the front end of the valve body is vertically cut according to an embodiment of the present application is shown; Figure 1

[0028] Figure 3 A schematic diagram of the structure according to an embodiment of the present application is shown.​Figure 1 Enlarged structure diagram of A in FIG. 1;

[0029] Figure 4 An embodiment according to the present application is shown Figure 2 Structure diagram of vertical section of front end of spool in FIG. 2;

[0030] Figure 5 An embodiment according to the present application is shown Figure 4 Enlarged structure diagram of B in FIG. 3;

[0031] Figure 6 An embodiment according to the present application is shown Figure 2 Structure diagram of upward movement of spool driven by valve stem to just enter lower sealing ring into lower end of flow passage in FIG. 4;

[0032] Figure 7 An embodiment according to the present application is shown Figure 6 Enlarged structure diagram of C in FIG. 5;

[0033] Figure 8 An embodiment according to the present application is shown Figure 6 Structure diagram of continuous upward movement of spool to disengage lower sealing ring from top end of lower sealing cylinder and top end of L-shaped clamping plate contact bottom end of threaded cylinder, and all tiny water outlet holes leak from top end of flow passage in FIG. 6;

[0034] Figure 9 An embodiment according to the present application is shown Figure 8 Structure diagram of side view of FIG. 7;

[0035] Figure 10 An embodiment according to the present application is shown Figure 9 Enlarged structure diagram of D in FIG. 8;

[0036] Figure 11 Structure diagram of spool and linkage plate disassembled in an embodiment according to the present application is shown;

[0037] Figure 12 An embodiment according to the present application is shown Figure 11 Structure diagram of side view of FIG. 9.

[0038] List of reference signs

[0039] 1, valve body; 101, lower sealing cylinder; 1011, blow-off hole; 102, flow passage; 2, threaded cylinder; 201, valve rod; 2011, lower clamping plate; 3, valve core; 301, threaded hole; 302, upper stop ring; 303, upper sealing ring; 304, tiny water outlet hole; 305, lower sealing ring; 306, lower stop ring; 3061, inner connecting block one; 307, inner connecting block two; 4, linkage plate; 401, threaded column; 402, L-shaped clamping plate; 5, inner sealing cover; 501, outer sealing ring; 502, upper sealing plate; 503, fixed cylinder; 6, spring; 7, cleaning structure; 701, cleaning operation shaft; 7011, baffle; 702, upper cleaning column; 703, cleaning plate; 7031, brush. DETAILED DESCRIPTION

[0040] In order to make the purpose, scheme and advantages of the technical scheme of the present application more clear, the technical scheme of the present application will be described clearly and completely in the following with reference to the drawings of the specific embodiments of the present application. Unless otherwise specified, the terms used herein have the meanings commonly used in the art. The same reference numerals in the drawings represent the same components.

[0041] Embodiment: Please refer to Figures 1 to 12 :

[0042] The present application provides a bidirectional sealing control valve seat, comprising: a valve body 1, a linkage plate 4, an inner sealing cover 5 and a cleaning structure 7.

[0043] The bottom of the valve body 1 is provided with a lower sealing cylinder 101, the bottom end of the lower sealing cylinder 101 extends downwardly beyond the bottom end of the valve body 1, and the inner diameter of the lower sealing cylinder 1 decreases from bottom to top in sequence, and is divided into a first inner cylinder, a second inner cylinder and a third inner cylinder in sequence, and the inner sealing cover 5 is installed in the second inner cylinder on the inner side of the lower sealing cylinder 1, the outer diameter of the inner sealing cover 5 is smaller than the inner diameter of the second inner cylinder on the inner side of the lower sealing cylinder 1 and larger than the inner diameter of the third inner cylinder on the inner side of the lower sealing cylinder 1, the bottom end of the lower sealing cylinder 101 is also provided with four groups of blowdown holes 1011, the top end of the valve body 1 is threadedly connected with a threaded cylinder 2, and the threaded cylinder 2 is sealed with a nut and a rubber pad, the linkage plate 4 is a conical frustum structure, the middle of the bottom of the linkage plate 4 is provided with a threaded column 401, the top of the linkage plate 4 is provided with two groups of opposite L-shaped clamping plates 402, the middle of the threaded cylinder 2 is also threadedly connected with a valve rod 201, and the bottom of the valve rod 201 is provided with a circular lower clamping plate 2011 which is clamped between the two groups of opposite L-shaped clamping plates 402, the water inlet end and the water outlet end in the valve body 1 are provided with a flow-through channel 102, the inner diameter of the flow-through channel 102 decreases from top to bottom in sequence, and is divided into an upper channel and a lower channel in sequence, and the valve core 3 is installed in the flow-through channel 102, the valve core 3 is a cylindrical structure with a closed top end and an open bottom end, the middle of the top of the valve core 3 is provided with an upper threaded hole 301, and the valve core 3 is threadedly connected to the bottom side of the linkage plate 4, the valve body 1 is also provided with a cleaning structure 7, and the cleaning plate 703 of the cleaning structure 7 is arranged in the valve core 3.

[0044] As Figure 11 With Figure 12As shown, the outer side of the valve core 3 is also provided with an upper blocking ring 302, and the outer diameter of the upper blocking ring 302 is the same as the upper passage inner diameter of the flow passage 102. The upper end of the valve core 3 is sleeved with an upper sealing ring 303, and the upper sealing ring 303 is attached to the upper side of the upper blocking ring 302, and the outer diameter thereof is also the same as the upper passage inner diameter of the flow passage 102. The valve core 3 is also provided with a small water outlet hole 304, and the small water outlet hole 304 is arranged on the lower side of the upper blocking ring 302. The lower end outer diameter of the valve core 3 is smaller than the upper end outer diameter, and is sleeved with a lower sealing ring 305, and the outer diameter of the lower sealing ring 305 is the same as the lower passage inner diameter of the flow passage 102 and the inner diameter of the third inner cylinder of the lower sealing cylinder 1. The bottom of the valve core 3 is also connected with a lower blocking ring 306, and the inner side of the lower blocking ring 306 is provided with four groups of inner connecting blocks one 3061, and the inner connecting blocks one 3061 are provided with inner hexagonal bolt through holes. The inner side of the bottom of the valve core 3 is also provided with four groups of inner connecting blocks two 307, and the inner connecting blocks two 307 are provided with inner threaded holes. The lower blocking ring 306 is connected with the valve core 3 through the inner hexagonal bolt through holes of the four groups of inner connecting blocks one 3061 and the inner threaded holes of the four groups of inner connecting blocks two 307 in a top-to-bottom manner through inner hexagonal bolts. The outer diameter of the lower blocking ring 306 is the same as the outer diameter of the lower sealing ring 305. When the valve is closed, the bottom end of the upper blocking ring 302 is attached to the bottom end of the upper passage of the flow passage 102, the outer wall of the upper sealing ring 303 at the upper end of the valve core 3 is tightly attached to the inner wall of the upper passage of the flow passage 102, and the outer wall of the lower sealing ring 305 at the lower end of the valve core 3 is tightly attached to the third inner cylinder of the inner side of the lower sealing cylinder 101, thereby avoiding water flowing into the valve core 3, and the flow passage 102 is sealed by the upper sealing ring 303.

[0045] As shown in the drawings, Figure 5 As shown in the drawings, Figure 7 As shown, the outer ring of the inner sealing cover 5 is sleeved with an outer sealing ring 501, and the outer sealing ring 501 is tightly attached to the inner wall of the second inner cylinder of the lower sealing cylinder 1. The inner sealing cover 5 is sealed by the outer sealing ring 501. The inner side of the inner sealing cover 5 and the bottom of the lower sealing cylinder 1 are also provided with a spring 6. The top of the inner sealing cover 5 is attached with an upper sealing plate 502. The outer diameter of the upper sealing plate 502 is greater than the inner diameter of the third inner cylinder of the lower sealing cylinder 1, and is smaller than the inner diameter of the third inner cylinder. The middle of the upper sealing plate 502 is provided with a through hole, and is tightly attached to the bottom of the third inner cylinder under the action of the spring 6, thereby sealing the bottom of the third inner cylinder.

[0046] As shown in the drawings, Figure 5As shown, the cleaning structure 7 also includes a cleaning operation shaft 701, a baffle 7011, an upper cleaning column 702, a cleaning plate 703, and bristles 7031. The cleaning operation shaft 701 is movably inserted through the bottom end of the lower sealing cylinder 1 and passes upward through the inner sealing cover 5 to connect with the baffle 7011. The thickness of the baffle 7011 is less than the thickness of the upper sealing plate 502, and it is placed in the through hole in the middle of the upper sealing plate 502 and attached to the top surface of the inner sealing cover 5. There are six sets of cleaning plates 703, which are evenly connected to the outer wall of the upper cleaning column 702. The outer ends of the six sets of cleaning plates 703 are respectively connected to bristles 7031, and the bristles 7031 are attached to the inner wall of the valve core 3. The upper cleaning column 702 is fixedly connected to the top end of the cleaning operation shaft 701, and the bottom end of the cleaning operation shaft 701 is also provided with an operating bristle 7031. The inner sealing cover 5 has a fixed cylinder 503 located in the middle of the bottom of the inner side. The cleaning operation shaft 701 is inserted into the fixed cylinder 503 and sealed by a mechanical seal. By rotating the cleaning operation shaft 701, the cleaning plate 703 and the bristles 7031 are driven to clean the tiny water outlet 304 of the valve core 3. By pulling the cleaning operation shaft 701 downward, the inner sealing cover 5 moves downward synchronously through the baffle 7011. When the outer sealing ring 501 on the inner sealing cover 5 leaves the second inner cylinder and enters the first inner cylinder, the bottom end of the third inner cylinder of the lower sealing cylinder is no longer sealed. This allows the impurities at the tiny water outlet 304 on the valve core 3 and the water remaining in the valve core 3 to be discharged downward through the drain hole 1011. The valve core 3 can be cleaned without disassembling the control valve.

[0047] like Figures 2-5 As shown, when the valve body 1 is sealed, the upper end of the valve core 3 is placed in the flow channel 102, the lower end of the valve core 3 is inserted into the lower sealing cylinder 101, and the outer wall of the upper sealing ring 303 is tightly attached to the upper channel of the flow channel 102, and the outer wall of the lower sealing ring 305 is tightly attached to the third inner cylinder inside the lower sealing cylinder 1, and the lower retaining ring 306 is placed in the second inner cylinder inside the lower sealing cylinder 1, the upper sealing plate 502 is attached to the bottom side of the lower retaining ring 306, and the outer end of the bristles 7031 is directly opposite the tiny water outlet hole 304.

[0048] like Figure 6 and Figure 7 As shown, when the valve core 3 is opened upwards, the lower end of the lower sealing ring 305 has just been inserted into the lower channel of the flow channel 102, and the lower end of the sealing ring 305 has not yet separated from the third inner cylinder inside the lower sealing cylinder 1.

[0049] like Figures 8-10As shown, when the valve body 1 is opened, the top end of the L-shaped clamping plate 402 is attached to the bottom side of the threaded cylinder 2, the small water outlet hole 304 is completely leaked from the flow-through channel 102, and the lower end of the valve core 3 is lifted into the lower channel of the flow-through channel 102, and the outer wall of the lower sealing ring 305 is tightly attached to the inner side of the lower channel of the flow-through channel 102. The flow-through channel 102 is sealed by the lower sealing ring 305, so that the water flows through the inner side of the valve core 3 and flows through the small water outlet hole 304, thereby facilitating the blocking of impurities in the water through the small water outlet hole 304 on the valve core 3.

[0050] The specific use and effect of the embodiment are as follows: in the present application, when the valve is closed, the bottom end of the upper retaining ring 302 is attached to the bottom end of the upper channel of the flow-through channel 102, the outer wall of the upper sealing ring 303 on the upper end of the valve core 3 is tightly attached to the upper channel of the flow-through channel 102, the outer wall of the lower sealing ring 305 on the lower end of the valve core 3 is tightly attached to the third inner cylinder inside the lower sealing cylinder 101, and the lower retaining ring 306 is placed in the second inner cylinder inside the lower sealing cylinder 101, the upper sealing plate 502 is attached to the bottom side of the lower retaining ring 306, and the flow-through channel 102 and the lower sealing cylinder 101 are bidirectionally sealed, at this time the small water outlet hole 304 is placed in the flow-through channel 102, thereby preventing water from flowing into the valve core 3 from both ends of the valve body, and the outer end of the brush 7031 is opposite to the small water outlet hole 304. The cleaning plate 703 and the brush 7031 can be driven to clean the small water outlet hole 304 of the valve core 3 by rotating the cleaning operation shaft 701, and by pulling down the cleaning operation shaft 701, the inner sealing cover 5 is driven to move downward synchronously by the baffle 7011, when the outer sealing ring 501 on the inner sealing cover 5 is separated from the second inner cylinder and enters the first inner cylinder, the bottom end of the third inner cylinder of the lower sealing cylinder is no longer sealed, and the impurities at the small water outlet hole 304 of the valve core 3 and the water remaining in the valve core 3 can be discharged downward through the drain hole 1011, so that the valve core 3 can be cleaned without disassembling the control valve, and the operation is relatively convenient.

[0051] The rotation of the valve stem 201 drives the linkage plate 4 and the valve core 3 to move upward, so that the valve is opened. When the top end of the L-shaped clamping plate 402 is attached to the bottom side of the threaded cylinder 2, all the tiny water outlet holes 304 are leaked from the flow-through passage 102, and the lower end of the valve core 3 is lifted into the lower passage of the flow-through passage 102, and the outer wall of the lower sealing ring 305 is tightly attached to the inner side of the lower passage of the flow-through passage 102. The flow-through passage 102 is sealed by the lower sealing ring 305, so that the water flows through the inner side of the valve core 3 and through the tiny water outlet holes 304, thereby facilitating the blocking of impurities in the water through the tiny water outlet holes 304 on the valve core 3. Moreover, the upper sealing plate 502 on the inner sealing cover 5 is tightly attached to the bottom of the third inner cylinder under the action of the spring 6, so as to seal the bottom of the third inner cylinder. Meanwhile, the cleaning operation shaft 701 and the fixed cylinder 503 of the inner sealing cover 5 are sealed by mechanical sealing, and the outer sealing ring 501 outside the inner sealing cover 5 is tightly attached in the second inner cylinder to improve the sealing effect and prevent water from flowing out of the drain hole 1011 of the lower sealing cylinder 101.

[0052] The above merely describes exemplary embodiments of the present application, but is not intended to limit the protection scope of the present application, which is defined by the appended claims.

Claims

1. A bi-directional seal control valve seat, characterized by, The utility model relates to a valve body (1), linkage board (4), inner sealing cover (5) and cleaning structure (7) are included: The bottom of valve body (1) is equipped with lower sealing cylinder (101), the bottom end of lower sealing cylinder (101) extends to the bottom end of valve body (1) downward, and the inside diameter of lower sealing cylinder (101) decreases gradually from bottom to top and is divided into first inner cylinder, second inner cylinder and third inner cylinder in turn, and inner sealing cover (5) is installed in the second inner cylinder of the inside of lower sealing cylinder (101), the outer diameter of inner sealing cover (5) is less than the inner diameter of the second inner cylinder of the inside of lower sealing cylinder (101) and is greater than the inner diameter of the third inner cylinder of the inside of lower sealing cylinder (101), the bottom end of lower sealing cylinder (101) is also equipped with four groups of blowdown hole (1011), the top port of valve body (1) is connected with threaded cylinder (2) by screw thread, and threaded cylinder (2) is sealed by nut and rubber pad, the linkage board (4) is the structure of conical frustum, the middle of bottom is equipped with threaded column (401), and the top is equipped with two groups of opposite L type clamping plate (402), the middle of threaded cylinder (2) is also connected with valve stem (201) by screw thread, and the bottom of valve stem (201) is equipped with circular lower clamping plate (2011), and rotates and clamps between two groups of opposite L type clamping plate (402), the water inlet end and water outlet end between the inside of valve body (1) are equipped with flow channel (102), the inside diameter of flow channel (102) decreases gradually from top to bottom and is divided into upper channel and lower channel in turn, and valve core (3) is installed in flow channel (102), the valve core (3) is the cylindrical structure of top end closure, bottom end opening, the middle of top is equipped with upper threaded hole (301), and valve core (3) is screwed in the bottom side of linkage board (4) by screw thread, the valve body (1) is also installed with cleaning structure (7), and the cleaning plate (703) of cleaning structure (7) is placed in valve core (3); The outer ring of inner sealing cover (5) is sleeved with outer sealing ring (501), and outer sealing ring (501) is tightly attached to the inner wall of the second inner cylinder of the inside of lower sealing cylinder (101), spring (6) is further equipped between the inside of inner sealing cover (5) and the bottom of lower sealing cylinder (101), the top of inner sealing cover (5) is pasted with upper sealing plate (502), the outer diameter of upper sealing plate (502) is greater than the inner diameter of the third inner cylinder of the inside of lower sealing cylinder (101), and is less than and the middle of upper sealing plate (502) is equipped with through hole, ​ The cleaning structure (7) further comprises a cleaning operation shaft (701), a baffle (7011), an upper cleaning column (702), a cleaning plate (703) and bristles (7031); the cleaning operation shaft (701) is movably inserted into the bottom end of the lower sealing cylinder (101) and passes upwardly through the inner sealing cover (5) and is connected with the baffle (7011), the thickness of the baffle (7011) is less than that of the upper sealing plate (502), and the baffle (7011) is arranged in the through hole in the middle of the upper sealing plate (502) and is attached to the top end surface of the inner sealing cover (5), the cleaning plate (703) is provided in six groups and is uniformly connected to the outer wall of the upper cleaning column (702), the outer end of each of the six groups of cleaning plates (703) is connected with the bristles (7031), and the bristles (7031) are attached to the inner wall of the valve core (3), the upper cleaning column (702) is fixedly connected to the top end of the cleaning operation shaft (701), and the bottom end of the cleaning operation shaft (701) is further provided with an operation hand wheel. The inner side of the bottom of the inner sealing cover (5) is further provided with a fixing cylinder (503), the cleaning operation shaft (701) is rotatably inserted into the fixing cylinder (503) and is sealed by a mechanical seal.

2. A bi-directional seal control valve seat as defined in claim 1, wherein: The outer side of the valve core (3) is further provided with an upper stop ring (302), the outer diameter of the upper stop ring (302) is the same as the inner diameter of the upper passage of the flow passage (102), the upper end of the valve core (3) is sleeved with an upper sealing ring (303), the outer diameter of the upper sealing ring (303) is also the same as the inner diameter of the upper passage of the flow passage (102), and the upper sealing ring (303) is attached to the upper side of the upper stop ring (302), the outer side of the lower end of the valve core (3) is smaller in diameter than the outer side of the upper end, and is sleeved with a lower sealing ring (305), and the outer diameter of the lower sealing ring (305) is the same as the inner diameter of the lower passage of the flow passage (102) and the inner diameter of the third inner cylinder of the inner side of the lower sealing cylinder (101).

3. A bi-directional seal control valve seat as defined in claim 2, wherein: The bottom of the valve core (3) is further connected with a lower stop ring (306), the inner side of the lower stop ring (306) is provided with four groups of inner connecting blocks one (3061), the inner hexagonal bolt through holes are arranged on the inner connecting blocks one (3061), the inner side of the bottom of the valve core (3) is further provided with four groups of inner connecting blocks two (307), the inner threaded holes are arranged on the inner connecting blocks two (307), the inner hexagonal bolt through holes of the four groups of inner connecting blocks one (3061) are respectively and oppositely connected with the inner threaded holes of the four groups of inner connecting blocks two (307) on the lower stop ring (306), and the lower stop ring (306) is connected with the valve core (3) through the inner hexagonal bolts, and the outer diameter of the lower stop ring (306) is the same as that of the lower sealing ring (305).

4. A bi-directional seal control valve seat as defined in claim 3, wherein: ​ 5. A bi-directional seal control valve seat as defined in claim 1, wherein: When the valve body (1) is sealed, the upper end of the valve core (3) is placed in the flow passage (102), the lower end of the valve core (3) is inserted into the lower sealing cylinder (101), the outer wall of the upper sealing ring (303) is tightly attached to the upper passage of the flow passage (102), the outer wall of the lower sealing ring (305) is tightly attached to the third inner cylinder inside the lower sealing cylinder (101), the lower retaining ring (306) is placed in the second inner cylinder inside the lower sealing cylinder (101), the upper sealing plate (502) is attached to the bottom side of the lower retaining ring (306), and the outer end of the bristles (7031) is opposite to the micro water outlet hole (304).

6. A bi-directional seal control valve seat as defined in claim 5, wherein: When the valve core (3) is opened upward, the upper end of the lower sealing ring (305) is just inserted into the lower passage of the flow passage (102), and the lower end of the sealing ring (305) has not yet separated from the third inner cylinder inside the lower sealing cylinder (101).

7. A bi-directional seal control valve seat as defined in claim 6, wherein: After the valve body (1) is opened, the top end of the L-shaped clamping plate (402) is attached to the bottom side of the threaded cylinder (2), the micro water outlet hole (304) is completely leaked from the flow passage (102), the lower end of the valve core (3) rises into the lower passage of the flow passage (102), and the outer wall of the lower sealing ring (305) is tightly attached to the lower passage of the flow passage (102).

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