A double-gate parallel sealing gate valve

Abstract

This invention relates to a double-gate parallel sealing gate valve, comprising a valve body and a sealing cylinder fixedly installed on its top. The extended end of the sealing cylinder movably penetrates the valve body and is fixedly mounted with a connecting seat. A first gate and a second gate are respectively fixedly mounted at both ends of the connecting seat. The input end of the valve body is fixedly connected to a water inlet pipe, which is located away from the second gate. The output end of the valve body is provided with a rust-preventing mechanism for drying the second gate. After the gate valve is closed and the sewage in the outer shell and drain pipe is emptied, the cylinder is controlled to separate the sealing cover from the second vent hole. The blocking rod is pulled out from the first vent hole, and at the same time, the L-shaped blower pipe is moved downward so that its output end faces the second gate. After the blower is turned on, the airflow is blown out from the output end of the L-shaped blower pipe, which, together with the first and second vent holes, discharges the humid air, slowing down the corrosion rate of the second gate surface and extending the service life of the gate valve.

Description

Technical Field

[0001] This invention relates to the field of double-gate valve technology, specifically a double-gate parallel sealing gate valve. Background Technology

[0002] The double-gate parallel sealing gate valve is a type of valve that achieves fluid control through the lifting and lowering movement of two parallel gates. Its core principle lies in using a mechanical linkage structure to form a reliable seal. The main structure of the gate valve is usually made of cast steel or forged steel, which has sufficient strength and rigidity to withstand the pressure and temperature changes of the fluid in the pipeline. During pipeline maintenance and replacement, it is necessary to close the double gate parallel sealing gate valve. The gate assembly is driven to descend through the transmission structure until it is tightly fitted with the valve seat. At this time, the spring or wedge generates pre-tightening force or achieves wedge tightening effect to ensure a reliable seal between the gate and the valve seat, effectively cutting off the flow of the medium. When a double gate valve is used in a sewage pipeline, a small amount of hard impurities may adhere to the inner wall of the valve body. During the process of the gate and valve seat fitting together, the edge of the gate may easily scrape against the hard impurities, affecting the efficiency of the tight fit between the gate and the valve seat. At the same time, because the hard impurities in the sewage flow process may scrape against the protective layer on the surface of the gate, causing damage to the protective layer, after the sewage flow is cut off, a small amount of moisture remains on the side of the gate away from the sewage, making the gate with the damaged protective layer more susceptible to corrosion, thus reducing the service life of the double gate valve. Summary of the Invention

[0003] The technical problem solved by this solution is: (1) How to solve the problem that after the sewage flow is cut off, a small amount of water remains on the side of the gate that is far away from the sewage, making the gate with damaged protective layer more susceptible to corrosion and reducing the service life of the double gate valve. (2) How to solve the problem that the edge of the gate is easily scratched by hard impurities during the process of the gate and the valve seat being fitted together, which affects the efficiency of the tight fit between the gate and the valve seat.

[0004] The objective of this invention can be achieved through the following technical solution: a double-gate parallel sealing gate valve, comprising a valve body and a sealing cylinder fixedly installed on its top, wherein the extended end of the sealing cylinder movably penetrates the valve body and is fixedly installed with a connecting seat, wherein a first gate and a second gate are respectively fixedly installed at both ends of the connecting seat, wherein a water inlet pipe is fixedly connected to the input end of the valve body, the water inlet pipe being disposed away from the second gate, and a rust-proof mechanism for drying the second gate is provided at the output end of the valve body; wherein, the connecting seat serves to connect the first gate and the second gate, enabling them to move synchronously, and the sealing cylinder is made of high-strength stainless steel to ensure that it can withstand greater pressure and has corrosion resistance during long-term use, ensuring the stability and reliability of the drive; the connecting seat is fixedly connected to the first gate and the second gate respectively by high-strength bolts, and anti-loosening measures are adopted at the bolt connection to prevent the bolts from loosening during frequent opening and closing of the gate valve, ensuring the firmness of the connection; The rust prevention mechanism includes a housing, the input end of which is fixedly connected to the output end of the valve body, and a plastic plate is fixedly installed on the top of the inner wall of the housing, and a rubber plate is fixedly installed on the bottom of the plastic plate, with the bottom of the rubber plate being higher than the top of the inner wall of the input end of the housing.

[0005] A further technical improvement of the present invention is that: a groove is provided at the bottom of the rubber plate, and an L-shaped air pipe is provided in the groove. The input end of the L-shaped air pipe movably passes through the top of the rubber plate, the plastic plate and the outer shell, and the output end of the L-shaped air pipe is in close contact with the inner sidewall of the groove; wherein, there is a guide structure between the L-shaped air pipe and the plastic plate to prevent the L-shaped air pipe from sliding or deviating during the lifting and lowering process.

[0006] A further technical improvement of the present invention is that: a baffle is fixedly installed in the upper middle part of the L-shaped blower pipe, a thrust spring is elastically provided between the baffle and the outer shell, and a first lever is fixedly installed at the top of the L-shaped blower pipe.

[0007] A further technical improvement of the present invention is that: a first vent hole is provided on the rubber plate on one side of the groove, and a second vent hole is provided on the outer shell above the first vent hole, wherein the diameter of the second vent hole is twice the diameter of the first vent hole.

[0008] A further technical improvement of the present invention is that: a blocking rod is movably disposed inside the second vent hole, the blocking rod is arranged longitudinally, and a sealing cap is fixedly installed on the top of the blocking rod. The diameter of the sealing cap is larger than the diameter of the second vent hole, and the bottom end of the blocking rod movably penetrates the plastic plate and is in close contact with the inner wall of the first vent hole; wherein, in the initial state, the blocking rod blocks the first vent hole and the sealing cap blocks the second vent hole to prevent external impurities from entering.

[0009] A further technical improvement of the present invention is that: a shield is fixedly installed on the top of the outer shell, a longitudinally arranged partition is fixedly installed on the inner wall of the shield, an opening is opened in the middle of the partition, a transmission frame is rotatably arranged on the inner wall of the opening through a pin, a sliding groove is opened at one end of the transmission frame, and the sliding groove is movably connected to the first lever.

[0010] A further technical improvement of the present invention is that: a driving cylinder is fixedly inserted into the top of the shield, the driving cylinder is arranged longitudinally, the extended end of the driving cylinder is fixedly connected to the sealing cover, and a second lever is also fixedly installed on the extended end of the driving cylinder. The second lever is slidably connected to one end of the transmission frame, and the second lever is located below the transmission frame.

[0011] A further technical improvement of the present invention is as follows: a blower is provided on the side of the partition away from the driving cylinder; the output end of the blower is connected to the input end of the L-shaped blow pipe via a flexible hose; a one-way valve is also fixedly installed on the output end of the blower; the input end of the blower is fixedly penetrated through the front wall of the shield; after the gate valve is closed, the sewage in the outer shell and drain pipe is drained, and then the extended end of the driving cylinder is controlled to retract from its longest to its shortest position, so that the sealing cover separates from the second vent hole, and the blocking rod is pulled out from the first vent hole, so that there is a gap between the blocking rod and the plastic plate. Meanwhile, due to the retraction of the extended end of the drive cylinder, the transmission frame is rotated in conjunction with the second lever, and the L-shaped blower tube is pushed downward by the first lever, so that the output end of the L-shaped blower tube extends out of the groove and faces the second gate plate. By turning on the blower, the airflow blown out along the hose from the output end of the L-shaped blower tube, and the moist air is discharged in conjunction with the first vent and the second vent until the surface of the second gate plate is dry. This speeds up the drying of the second gate plate surface, thereby slowing down the corrosion rate of the second gate plate surface and extending the service life of the gate valve.

[0012] A further technical improvement of the present invention is that: the second gate is used to block the input end of the housing, and a second sealing ring is fixedly sleeved on the outer edge surface of the second gate. The diameter of the second sealing ring is larger than the inner diameter of the input end of the housing, and the second sealing ring is set close to the input end of the housing. During the process of closing the gate valve, by controlling the extended end of the sealing cylinder to extend to its maximum length, the first gate and the second gate are driven to move downward, so that the first gate and the second gate are tightly fitted with the corresponding valve seats in the valve body. During this process, the first sealing ring and the second sealing ring on the surface of the first gate and the second gate scrape off the hard impurities on the inner wall of the valve body, avoiding hard contact between the first gate and the second gate and the valve body, reducing scratches on the edges and surfaces of the first gate and the second gate, thereby avoiding affecting the efficiency of their tight fit with the corresponding valve seats. At the same time, the tight fit between the first sealing ring and the second sealing ring and the inner wall of the valve body further improves the sealing performance of the valve body.

[0013] A further technical improvement of the present invention is that: the first gate is used to block the output end of the water inlet pipe, and a first sealing ring is fixedly sleeved on the outer edge surface of the first gate. The diameter of the first sealing ring is larger than the inner diameter of the output end of the water inlet pipe, and the first sealing ring is set close to the output end of the water inlet pipe. The first sealing ring and the second sealing ring are both made of nitrile rubber, which has good wear resistance and corrosion resistance, and can effectively scrape hard impurities from the inner wall of the valve body while ensuring its service life.

[0014] Compared with the prior art, the beneficial effects of the present invention are: In terms of rust prevention, after the gate valve is closed and the sewage in the outer shell and drain pipe is drained, the control of the drive cylinder causes the sealing cover to separate from the second vent, the blocking rod to be pulled out from the first vent, and at the same time, the L-shaped blower pipe moves downward so that its output end faces the second gate plate. After the blower is turned on, the airflow blows out from the output end of the L-shaped blower pipe, which, together with the first and second vents, discharges the humid air, accelerating the drying speed of the second gate plate surface, slowing down the corrosion rate of the second gate plate surface, and extending the service life of the gate valve. In addition, the design of the drain pipe corresponding to the input end of the outer shell effectively reduces the impact on the outer shell during sewage flow, and improves the stability and reliability of the overall gate valve structure.

[0015] In use, this invention improves sealing performance by setting a first sealing ring and a second sealing ring on the outer edges of the first and second gates, respectively. During the gate valve closing process, the sealing rings can scrape off hard impurities on the inner wall of the valve body, preventing the gate from making hard contact with impurities, reducing scratches on the edges and surfaces of the gate, effectively ensuring the efficiency of tight fit between the gate and the corresponding valve seat, further improving the sealing performance of the valve body, and preventing sewage leakage. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall front structure of the present invention; Figure 3 This is a cross-sectional view of the internal structure of the outer casing of the present invention; Figure 4 This is a three-dimensional schematic diagram of the rust prevention mechanism of the present invention; Figure 5 This is a three-dimensional schematic diagram of the structure inside the shielding cover of the present invention; Figure 6 For the present invention Figure 2 Enlarged view of the structure at point A in the middle; Figure 7This is a three-dimensional schematic diagram of the structure of the first and second gates of the present invention.

[0018] In the diagram: 1. Rust prevention mechanism; 2. Drain pipe; 3. Water inlet pipe; 4. Valve body; 5. Sealing cylinder; 6. Connecting seat; 7. First gate plate; 8. Second sealing ring; 9. Second gate plate; 101. Drive cylinder; 102. Shield; 103. Outer shell; 104. Sealing cover; 105. Blocking rod; 106. Plastic plate; 107. First vent; 108. Groove; 109. Rubber plate; 110. L-shaped blower; 111. Second vent; 112. Blower; 113. Opening; 114. Transmission frame; 115. Second lever; 116. Thrust spring; 117. Baffle; 118. First lever; 119. Hose; 120. Partition. Detailed Implementation

[0019] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-7 As shown, a double-gate parallel sealing gate valve includes a valve body 4 and a sealing cylinder 5 fixedly installed on its top. The extended end of the sealing cylinder 5 movably passes through the valve body 4 and is fixedly installed with a connecting seat 6. A first gate 7 and a second gate 9 are fixedly installed at both ends of the connecting seat 6, respectively. The input end of the valve body 4 is fixedly connected to a water inlet pipe 3, which is located away from the second gate 9. The output end of the valve body 4 is provided with a rust-proof mechanism 1 for drying the second gate 9. The connecting seat 6 serves to connect the first gate 7 and the second gate 9, enabling them to move synchronously. The sealing cylinder 5 is made of high-strength stainless steel to ensure that it can withstand greater pressure and has corrosion resistance during long-term use, ensuring the stability and reliability of the drive. The connecting seat 6 is fixedly connected to the first gate 7 and the second gate 9 by high-strength bolts. Anti-loosening measures are adopted at the bolt connection to prevent the bolts from loosening during frequent opening and closing of the gate valve, ensuring the firmness of the connection.

[0021] Please see Figure 2 and Figure 3 As shown, the rust prevention mechanism 1 includes a housing 103. The input end of the housing 103 is fixedly connected to the output end of the valve body 4. A plastic plate 106 is fixedly installed on the top of the inner wall of the housing 103. A rubber plate 109 is fixedly installed on the bottom of the plastic plate 106. The bottom of the rubber plate 109 is higher than the top of the inner wall of the input end of the housing 103.

[0022] Please see Figure 3As shown, the bottom of the rubber plate 109 is provided with a groove 108, and an L-shaped air pipe 110 is provided in the groove 108. The input end of the L-shaped air pipe 110 movably passes through the top of the rubber plate 109, the plastic plate 106 and the outer shell 103, and the output end of the L-shaped air pipe 110 is in close contact with the inner sidewall of the groove 108. A guide strip is fixedly installed on the outer wall of the L-shaped air pipe 110 at the connection with the plastic plate 106. The guide strip slides through the plastic plate 106 to prevent the L-shaped air pipe 110 from sliding or deviating during the lifting and lowering process.

[0023] Please see Figure 5 As shown, a baffle 117 is fixedly installed on the upper middle part of the L-shaped blower pipe 110, a thrust spring 116 is elastically provided between the baffle 117 and the outer shell 103, and a first lever 118 is fixedly installed on the top of the L-shaped blower pipe 110.

[0024] Please see Figure 3 As shown, a first vent hole 107 is provided on the rubber plate 109 on one side of the groove 108, and a second vent hole 111 is provided on the outer shell 103 above the first vent hole 107. The diameter of the second vent hole 111 is twice the diameter of the first vent hole 107.

[0025] Please see Figure 3 and Figure 4 As shown, a blocking rod 105 is movably disposed inside the second vent 111. The blocking rod 105 is arranged longitudinally, and a sealing cap 104 is fixedly installed on the top of the blocking rod 105. The diameter of the sealing cap 104 is larger than the diameter of the second vent 111. The bottom end of the blocking rod 105 movably penetrates the plastic plate 106 and is in close contact with the inner wall of the first vent 107. In the initial state, the blocking rod 105 blocks the first vent 107, and the sealing cap 104 blocks the second vent 111 to prevent external impurities from entering.

[0026] Please see Figure 4 and Figure 5 As shown, a shield 102 is fixedly installed on the top of the outer shell 103. A longitudinally arranged partition 120 is fixedly installed on the inner wall of the shield 102. An opening 113 is opened in the middle of the partition 120. A transmission frame 114 is rotatably arranged on the inner wall of the opening 113 via a pin. A sliding groove is opened at one end of the transmission frame 114. The sliding groove is movably connected to the first lever 118.

[0027] Please see Figure 4 and Figure 5As shown, a drive cylinder 101 is fixedly inserted into the top of the shield 102. The drive cylinder 101 is arranged longitudinally. The extended end of the drive cylinder 101 is fixedly connected to the sealing cover 104. A second lever 115 is also fixedly installed on the extended end of the drive cylinder 101. The second lever 115 is slidably connected to one end of the transmission frame 114, and the second lever 115 is located below the transmission frame 114.

[0028] Please see Figure 1 and Figure 4 As shown, a blower 112 is provided on the side of the partition 120 away from the drive cylinder 101. The output end of the blower 112 is connected to the input end of the L-shaped blower pipe 110 through a hose 119. A one-way valve is also fixedly installed at the output end of the blower 112. The opening direction of the one-way valve is the same as the direction of airflow entering the L-shaped blower pipe 110 from the hose 119. The input end of the blower 112 is fixedly penetrated through the front wall of the shield 102. After the gate valve is closed, wait for the sewage in the outer shell 103 and the drain pipe 2 to be drained, and then control the extended end of the drive cylinder 101 to retract from its longest to its shortest position, so that the sealing cover 104 separates from the second vent 111, and the blocking rod 105 is pulled out from the first vent 107, so that the block There is a gap between the stopper rod 105 and the plastic plate 106. At the same time, due to the retraction of the extended end of the drive cylinder 101, the transmission frame 114 is rotated in conjunction with the second lever 115. Then, the first lever 118 pushes the L-shaped blower pipe 110 downward, so that the output end of the L-shaped blower pipe 110 extends out of the groove 108 and is set towards the second gate plate 9. By turning on the blower 112, the blown air is blown out from the output end of the L-shaped blower pipe 110 along the hose 119. The first vent 107 and the second vent 111 expel the humid air until the surface of the second gate plate 9 is dry. This speeds up the drying of the surface of the second gate plate 9, thereby slowing down the corrosion rate of the surface of the second gate plate 9 and extending the service life of the gate valve.

[0029] Please see Figure 2 and Figure 4 As shown, the output end of the aforementioned housing 103 is fixedly connected to a drain pipe 2, and the central axis of the drain pipe 2 is on the same straight line as the central axis of the input end of the housing 103; by the corresponding position of the drain pipe 2 and the input end of the housing 103, the impact on the housing 103 during the flow of sewage is effectively reduced.

[0030] Please see Figure 1 , Figure 6 and Figure 7As shown, the second gate 9 is used to block the input end of the housing 103, and a second sealing ring 8 is fixedly sleeved on the outer edge surface of the second gate 9. The diameter of the second sealing ring 8 is larger than the inner diameter of the input end of the housing 103, and the second sealing ring 8 is set close to the input end of the housing 103. During the process of closing the gate valve, by controlling the extended end of the sealing cylinder 5 to extend to its maximum length, the first gate 7 and the second gate 9 are driven to move downward, so that the first gate 7 and the second gate 9 are tightly fitted with the corresponding valve seats in the valve body 4. During this process, the first sealing ring and the second sealing ring 8 on the surface of the first gate 7 and the second gate 9 scrape off the hard impurities on the inner wall of the valve body 4, avoiding hard contact between the first gate 7 and the second gate 9 and them, reducing scratches on the edges and surfaces of the first gate 7 and the second gate 9, thereby avoiding affecting the efficiency of their tight fit with the corresponding valve seats. At the same time, the tight fit between the first sealing ring and the second sealing ring 8 and the inner wall of the valve body 4 further improves the sealing performance of the valve body 4.

[0031] Please see Figure 1 and Figure 7 As shown, the first gate 7 is used to block the output end of the water inlet pipe 3, and a first sealing ring is fixedly sleeved on the outer edge surface of the first gate 7. The diameter of the first sealing ring is larger than the inner diameter of the output end of the water inlet pipe 3, and the first sealing ring is set close to the output end of the water inlet pipe 3. The first sealing ring and the second sealing ring 8 are both made of nitrile rubber, which has good wear resistance and corrosion resistance, and can effectively scrape away hard impurities on the inner wall of the valve body 4 while ensuring its service life.

[0032] Working Principle: In use, when the extended end of the sealing cylinder 5 is at its shortest length, the first gate 7 and the second gate 9 are located at the top of the valve body 4. At this time, the gate valve is open, and sewage will pass through the inlet pipe 3 into the valve body 4, and after passing through the inside of the outer casing 103, flow into the drain pipe 2. During the process of closing the gate valve, the extended end of the sealing cylinder 5 is extended to its longest length, thereby driving the first gate 7 and the second gate 9 to move downwards, so that the first gate 7 and the second gate 9 are tightly fitted with the corresponding valve seats in the valve body 4. During this process, the first sealing ring and the second sealing ring 8 on the surface of the first gate 7 and the second gate 9 scrape off hard impurities on the inner wall of the valve body 4, avoiding hard contact between the first gate 7 and the second gate 9 and the valve body 4, reducing scratches on the edges and surfaces of the first gate 7 and the second gate 9, thereby avoiding affecting the efficiency of their tight fit with the corresponding valve seats. At the same time, the tight fit between the first sealing ring and the second sealing ring 8 and the inner wall of the valve body 4 further improves the sealing performance of the valve body 4. After the gate valve is closed, wait for the sewage in the housing 103 and drain pipe 2 to drain out, then control the extended end of the drive cylinder 101 to retract from its longest to its shortest position, so that the sealing cover 104 separates from the second vent 111, and the blocking rod 105 is pulled out from the first vent 107, so that there is a gap between the blocking rod 105 and the plastic plate 106. At the same time, due to the retraction of the extended end of the drive cylinder 101, the second lever 115 drives the transmission frame 114 to rotate, and then the first lever 118 pushes the L-shaped blower. The tube 110 moves downward, causing the output end of the L-shaped blower tube 110 to extend from the groove 108 and face the second gate 9. By turning on the blower 112, the airflow blown out along the hose 119 from the output end of the L-shaped blower tube 110. This airflow, together with the first vent 107 and the second vent 111, discharges the humid air until the surface of the second gate 9 is dry. This speeds up the drying process of the second gate 9, thereby slowing down the corrosion rate of the second gate 9 surface and extending the service life of the gate valve.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A double flashboard parallel seal gate valve, comprising a valve body (4) and a sealing cylinder (5) fixedly installed on the top of the valve body, characterized in that: The sealing cylinder (5) is movably penetrated through the valve body (4) and is fixedly installed with a connecting seat (6), the two ends of the connecting seat (6) are fixedly installed with a first gate plate (7) and a second gate plate (9) respectively, the input end of the valve body (4) is fixedly communicated with a water inlet pipe (3), the water inlet pipe (3) is arranged away from the second gate plate (9), and the output end of the valve body (4) is provided with a rust prevention mechanism (1) for drying the second gate plate (9); The rust prevention mechanism (1) comprises an outer shell (103), the input end of the outer shell (103) is fixedly communicated with the output end of the valve body (4), the inner wall top of the outer shell (103) is fixedly provided with a plastic plate (106), and the bottom of the plastic plate (106) is fixedly installed with a rubber plate (109), and the bottom of the rubber plate (109) is higher than the inner wall top of the input end of the outer shell (103).

2. A double flanged parallel seal gate valve according to claim 1, characterized in that, The bottom of the rubber plate (109) is provided with a groove (108), and the groove (108) is provided with an L-shaped blowing pipe (110), the input end of the L-shaped blowing pipe (110) is movably penetrated through the top of the rubber plate (109), the plastic plate (106) and the outer shell (103), and the output end of the L-shaped blowing pipe (110) is tightly attached to the inner side wall of the groove (108).

3. A double flanged parallel seal gate valve according to claim 2, characterized in that, The middle upper portion of the L-shaped blowing pipe (110) is fixedly installed with a baffle (117), the baffle (117) and the outer shell (103) are elastically provided with a thrust spring (116), and the top of the L-shaped blowing pipe (110) is fixedly installed with a first turning rod (118).

4. A double flanged parallel seal gate valve according to claim 3, characterized in that, A first air hole (107) is formed in the rubber plate (109) on one side of the groove (108), a second air hole (111) is formed in the outer shell (103) above the first air hole (107), and the diameter of the second air hole (111) is twice the diameter of the first air hole (107).

5. A double flanged parallel seal gate valve according to claim 4, characterized in that, A blocking rod (105) is movably arranged in the second air hole (111), a sealing cover (104) is fixedly installed at the top of the blocking rod (105), the diameter of the sealing cover (104) is greater than the diameter of the second air hole (111), the bottom end of the blocking rod (105) is movably penetrated through the plastic plate (106) and is tightly attached to the inner wall of the first air hole (107).

6. A double flanged parallel seal gate valve according to claim 5, characterized in that, A shielding cover (102) is fixedly installed at the top of the outer shell (103), a partition plate (120) is fixedly installed on the inner wall of the shielding cover (102), an opening (113) is formed in the middle portion of the partition plate (120), a transmission frame (114) is rotatably arranged on the inner wall of the opening (113), and a sliding groove is formed in one end of the transmission frame (114) and is movably connected with the first turning rod (118).

7. A double flanged parallel seal gate valve according to claim 6, characterized in that, A drive cylinder (101) is fixedly inserted into the top of the shield (102). The extended end of the drive cylinder (101) is fixedly connected to the sealing cover (104). A second lever (115) is also fixedly installed on the extended end of the drive cylinder (101). The second lever (115) is slidably connected to one end of the transmission frame (114), and the second lever (115) is located below the transmission frame (114).

8. A double flanged parallel seal gate valve according to claim 7, characterized in that, A blower (112) is provided on the side of the partition (120) away from the drive cylinder (101). The output end of the blower (112) is connected to the input end of the L-shaped blow pipe (110) through a hose (119). A one-way valve is also fixedly installed on the output end of the blower (112). The input end of the blower (112) is fixedly penetrated through the front wall of the shield (102).

9. A double flanged parallel seal gate valve according to claim 1, characterized in that, The second gate (9) is used to block the input end of the housing (103), and a second sealing ring (8) is fixedly sleeved on the outer edge surface of the second gate (9). The diameter of the second sealing ring (8) is larger than the inner diameter of the input end of the housing (103), and the second sealing ring (8) is set close to the input end of the housing (103).

10. A double flanged parallel seal gate valve according to claim 1, characterized in that, The first gate (7) is used to block the output end of the water inlet pipe (3), and a first sealing ring is fixedly sleeved on the outer edge surface of the first gate (7). The diameter of the first sealing ring is larger than the inner diameter of the output end of the water inlet pipe (3), and the first sealing ring is set close to the output end of the water inlet pipe (3).

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