Sealing grease injection structure and single-plate flat valve with same

Abstract

The invention relates to the technical field of flat valves, in particular to a sealing grease injection structure and a single-plate flat valve with the sealing grease injection structure. The sealing grease injection structure comprises a storage tank mechanism connected with a gate plate, and the storage tank mechanism is located in a containing area formed between a valve body and a valve cover; a sealing plate area used for sealing the valve body medium channel is arranged on the upper portion of the gate plate, and an opening used for opening the valve body medium channel is formed in the lower portion of the gate plate. The storage tank mechanism is connected with the two injection air bags in the air bag grooves in the two sides of the flashboard sealing plate area, and the two injection air bags are matched with the two valve seats installed in the valve body. The vertical movement of the storage tank mechanism and the gate plate is coupled, when the gate plate moves downwards to close the valve, the storage tank mechanism is pressed on the upper surface of the valve body, and sealing grease is automatically and accurately pressed into the injection air bag, so that the injection air bag expands and is tightly attached to the valve seat, and active and enhanced sealing force is formed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flat valve, more particularly, to a sealing grease injection structure and a single-plate flat valve with the same. BACKGROUND

[0002] As a key equipment in the field of fluid control, flat valve is widely used in high-pressure and high-risk industrial pipelines such as petroleum, chemical industry and natural gas. Its core function is to reliably open and close the flow passage and achieve zero leakage sealing of the medium. The sealing performance of the valve is directly related to production safety, operating cost and environmental protection.

[0003] In the prior art, the sealing of the flat valve mainly relies on the metal-metal contact between the gate plate and the valve seat to form a rigid seal. In the working conditions of frequent opening and closing of the valve or containing solid particles in the medium, the sealing surface of the gate plate and the valve seat is prone to wear and scratch. Once the sealing surface is damaged, the sealing specific pressure will decrease, which will lead to medium leakage and seriously affect the sealing life and reliability of the valve. Moreover, in the working conditions with large temperature and pressure fluctuations, the thermal expansion and contraction of the valve body, gate plate and other components will change the pre-tightening state of the sealing pair. The traditional rigid sealing structure is difficult to adapt to such changes, which may lead to loose sealing at low temperature or low pressure, and excessive torque or even jamming when opening and closing at high temperature due to excessive interference. To solve the above problems of wear and leakage, many flat valves are designed with external grease injection mechanisms to allow the injection of sealing grease into the sealing surface without stopping the machine to fill the micro defects and form an auxiliary seal. However, the grease injection operation in the prior art is usually performed manually on a regular basis or after leakage is found, and cannot realize real-time and active sealing compensation in conjunction with the opening and closing action of the valve.

[0004] In addition, some existing structures with automatic grease injection function are often complex in design, requiring additional power sources (such as hydraulic pumps, compressed air) or complex control units, resulting in high manufacturing cost. SUMMARY

[0005] A series of simplified concepts are introduced in the summary section, which will be further described in detail in the detailed description section. The summary section of the present application does not mean to attempt to limit the key features and necessary technical features of the claimed technical solution, nor to determine the protection scope of the claimed technical solution.

[0006] To at least partially solve the above problems, the present application provides a sealing grease injection structure, comprising: a storage tank mechanism connected with a gate plate, the storage tank mechanism being located in a containing area formed between a valve body and a valve cover; a sealing plate area for closing a medium passage of the valve body being provided on an upper portion of the gate plate, and an open port for opening the medium passage of the valve body being provided on a lower portion of the gate plate; the storage tank mechanism being connected with two injection air bags in air bag grooves on both sides of the sealing plate area of the gate plate, the two injection air bags being matched with two valve seats installed in the valve body; when the gate plate moves downward to make the sealing plate area close the medium passage, the storage tank mechanism contacts with an upper surface of the valve body to make the sealing grease in the storage tank mechanism be pressed into the two injection air bags; when the gate plate moves upward to make the open port open the medium passage, the storage tank mechanism is separated from the upper surface of the valve body to make the sealing grease in the two injection air bags be drawn back to the storage tank mechanism.

[0007] Further, two annular sealing grooves are oppositely provided on both sides of the sealing plate area of the gate plate, and inner sides of the two valve seats can be inserted into the two annular sealing grooves; the two air bag grooves are coaxially provided on inner sides of the two annular sealing grooves to be sealingly matched with inner end faces of the two valve seats inserted into the two annular sealing grooves.

[0008] Further, a chamfer or a round corner is provided at a contact position of the annular sealing groove and the valve seat to make the valve seat slide into the inner side of the annular sealing groove or slide out of the outer side of the annular sealing groove when the gate plate moves.

[0009] Further, the storage tank mechanism comprises: two pre-storage injection assemblies connected with each other by bolts and nuts, the two pre-storage injection assemblies forming an annular structure and being sleeved in annular grooves provided on both sides of the upper portion of the gate plate; and the two pre-storage injection assemblies being one-to-one connected with the two injection air bags.

[0010] Further, the pre-storage injection assembly comprises: a semi-annular box body sealingly connected with a box cover; two injection holes of the box cover being connected with one ends of two injection pipes, the two injection pipes being sealingly fixed in a longitudinal pipe passage on an upper surface of the gate plate, and one ends of the two injection pipes penetrating into the air bag grooves being connected with the injection air bags; a semi-annular piston disc being sealingly and slidingly connected in the semi-annular box body, a lower surface of the semi-annular piston disc being fixedly connected with top portions of a plurality of bearing shafts, middle portions of the plurality of bearing shafts being slidingly matched on a bottom surface of the semi-annular box body, and bottom portions of the plurality of bearing shafts being connected with a pressure control plate for abutting and matching with the upper surface of the valve body; the semi-annular piston disc and the bottom surface of the semi-annular box body being connected by a plurality of reset tension springs capable of being stretched.

[0011] Further, an inner side surface of the injection air bag is glued and fixed on an inner side surface of the air bag groove.

[0012] Further, a valve rod sealingly sliding in a central hole of the valve cover is connected with a top portion of the gate plate, the valve rod being provided with sealing grease storage grooves connected with the two pre-storage injection assemblies, and a one-way supplement mechanism being installed in the sealing grease storage grooves to make the sealing grease above the one-way supplement mechanism be one-way supplemented and delivered to below the one-way supplement mechanism.

[0013] Further, the one-way supplement mechanism comprises a partition disc installed in the sealing grease storage tank, the partition disc separates the upper and lower sides inside the sealing grease storage tank into an adding area and a supplement area, the supplement area is connected with the supplement port on the tank cover through the supplement pipe arranged on the side of the valve rod; a vertical sliding shaft is slidingly connected in a vertical through hole in the middle of the partition disc, the side wall of the vertical sliding shaft is uniformly surrounded by a plurality of flow guide grooves, the plurality of flow guide grooves and the inner wall of the vertical through hole form a sealing grease flow path, a limiting ring for clamping on the upper surface of the partition disc is fixed to the top of the vertical sliding shaft, an anti-backflow conical head for plugging into the conical through hole in the bottom of the partition disc is fixed to the bottom of the vertical sliding shaft, and the vertical through hole and the conical through hole are coaxially communicated; a reverse conical pressure head is arranged at the bottom of the anti-backflow conical head; an annular sealing ring is fixed to the lower surface of the partition disc, and an annular insertion groove for inserting and cooperating with the annular sealing ring is arranged on the anti-backflow conical head.

[0014] Further, the partition disc is sealingly and slidingly fitted in the upper and lower limiting areas in the sealing grease storage tank; a door-shaped frame is fixed to the top of the partition disc, the door-shaped frame is rotationally connected with the bottom of the regulating screw, and the middle of the regulating screw is threadedly connected with the support on the top of the sealing grease storage tank.

[0015] The single-plate flat valve comprises the sealing grease injection structure of any one of the above.

[0016] Compared with the prior art, the present application has at least the following beneficial effects: The present application couples the storage tank mechanism with the vertical movement of the gate plate, when the gate plate is closing the valve downward, the storage tank mechanism is pressed on the upper surface of the valve body, automatically and accurately presses the sealing grease into the injection air bag, so that the injection air bag is inflated and tightly adheres to the valve seat, forming an active and enhanced sealing force; this process is synchronized with the closing action, without external intervention, ensuring that a reliable sealing layer can be obtained every time the valve is closed, effectively compensating for the wear of the sealing surface, fundamentally solving the leakage problem caused by wear, and being particularly suitable for frequent opening and closing conditions. When the gate plate is opened upward, the storage tank mechanism is separated from the surface of the valve body under the action of the return spring, a negative pressure is generated inside, most of the sealing grease in the injection air bag is sucked back into the storage tank mechanism, facilitating the opening of the gate plate, and reducing the wear between the valve seat and the injection air bag when the gate plate is opened. In addition, the sealing grease storage tank and the one-way supplement mechanism arranged on the top of the valve rod construct a sustainable sealing grease supply system. When the pre-stored sealing grease in the injection assembly is reduced due to natural loss, under the action of pressure difference, the one-way supplement mechanism can automatically supplement the standby sealing grease above to the lower part, ensuring that there is always sufficient sealing grease in the storage tank mechanism, and using the cooperation of the anti-backflow conical head and the annular sealing ring, effectively preventing the backflow of the sealing grease, ensuring the one-way and reliability of the supplement process, and greatly prolonging the maintenance-free operation cycle of the valve.

[0017] For the above-mentioned purposes, features and advantages of the present application to be more apparent and easy to understand, the following preferred embodiments are specifically described below, and the accompanying drawings are used to explain the present application, and do not constitute a limitation to the present application. In the drawings: BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation to the present application. In the drawings: Figure 1 A perspective view of a sealing grease injection structure and a single-plate flat valve provided with the same according to the present application; Figure 2 A front view of a sealing grease injection structure and a single-plate flat valve provided with the same according to the present application; Figure 3 A top view of a sealing grease injection structure and a single-plate flat valve provided with the same according to the present application; Figure 4 A sectional view of a sealing grease injection structure and a single-plate flat valve provided with the same according to the present application; Figure 5 A partial view of a sealing grease injection structure and a single-plate flat valve provided with the same according to the present application; Figure 6 A partial sectional view of a sealing grease injection structure and a single-plate flat valve provided with the same according to the present application; Figure 7 A schematic view of a storage tank mechanism according to the present application; Figure 8 A schematic view of a pre-storage injection assembly according to the present application; Figure 9 A sectional view of a pre-storage injection assembly according to the present application; Figure 10 A schematic view of a one-way replenishment mechanism according to the present application; Figure 11 A partial sectional view of a one-way replenishment mechanism according to the present application; Figure 12 A schematic view of a gate according to the present application; Figure 13 A schematic view of a vertical sliding shaft and an anti-backflow conical head according to the present application.

[0019] Legend: Gate 1; Storage tank mechanism 2; Valve body 3; Valve cover 4; Injection air bag 5; Valve seat 6; Pre-storage injection assembly 7; Semi-annular box 701; Box cover 702; Injection pipe 703; Semi-annular piston disc 704; Bearing shaft 705; Pressure control plate 706; Reset tension spring 707; Valve stem 8; Sealing grease storage groove 801; One-way replenishment mechanism 9; Partition disc 901; Vertical sliding shaft 902; Flow guide groove 903; Limiting ring 904; Anti-backflow conical head 905; Inverted conical pressure head 906; Annular sealing ring 907; Door-shaped frame 908; Regulating screw 909. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0022] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0023] The following is in conjunction with the appendix Figures 1-13 The present invention will be described in further detail below.

[0024] Example 1: As Figures 1-13 As shown, a grease injection structure includes: a storage tank mechanism 2 connected to a gate 1, the storage tank mechanism 2 being located within a receiving area formed between a valve body 3 and a valve cover 4; the upper part of the gate 1 is provided with a sealing plate area for closing the medium channel of the valve body 3, and the lower part of the gate 1 is provided with an opening for opening the medium channel of the valve body 3; the storage tank mechanism 2 is connected to two injection airbags 5 in the airbag grooves on both sides of the sealing plate area of ​​the gate 1, and the two injection airbags 5 cooperate with two valve seats 6 installed in the valve body 3; when the gate 1 moves downward to close the medium channel by the sealing plate area, the storage tank mechanism 2 contacts the upper surface of the valve body 3, causing the grease in the storage tank mechanism 2 to be pressed into the two injection airbags 5; when the gate 1 moves upward to open the medium channel by the opening, the storage tank mechanism 2 separates from the upper surface of the valve body 3, causing the grease in the two injection airbags 5 to be drawn back into the storage tank mechanism 2.

[0025] The working principle and technical effects of the above scheme are as follows: When the gate plate 1 moves downward, the sealing plate area at the upper part of the gate plate 1 gradually closes the medium channel of the valve body 3, and the storage tank mechanism 2 connected with the gate plate 1 moves downward together with the gate plate 1 until the storage tank mechanism 2 contacts with the upper surface of the valve body 3. Due to the contact, the storage tank mechanism 2 is pressed by the upper surface of the valve body 3, and the sealing grease in the storage tank mechanism 2 is pressed into the two injection air bags 5 connected with the storage tank mechanism 2 under the action of the pressure. When the sealing grease is injected, the injection air bags 5 begin to expand and tightly fit the two valve seats 6 installed in the valve body 3 to form a seal. When the gate plate 1 moves downward to close the valve, the storage tank mechanism 2 is pressed by the upper surface of the valve body 3, and automatically presses the sealing grease into the injection air bags 5 to make the injection air bags 5 expand and tightly fit the valve seats 6 to form an active and enhanced sealing force. This process is synchronized with the closing action and does not require external intervention, which ensures that a reliable sealing layer can be obtained every time the valve is closed. Since the injection air bags 5 tightly fit the valve seats 6 when the valve is closed, the wear of the sealing surface can be effectively compensated. In the working condition of frequent opening and closing, the sealing surface is prone to wear, and the sealing layer formed by the active injection of the sealing grease can fundamentally solve the leakage problem caused by wear, prolong the service life of the valve, and reduce the maintenance cost and safety hazards caused by leakage. When the gate plate 1 moves upward, the open port at the lower part of the gate plate 1 gradually opens the medium channel of the valve body 3, and the storage tank mechanism 2 connected with the gate plate 1 also rises together with the gate plate 1, and the storage tank mechanism 2 is separated from the upper surface of the valve body 3. During the separation process, the storage tank mechanism 2 is reset and a negative pressure is generated in the storage tank mechanism 2. Under the action of the negative pressure, most of the sealing grease in the two injection air bags 5 is sucked back into the storage tank mechanism 2 to facilitate the opening of the gate plate 1. When the gate plate 1 moves upward to open the valve, the storage tank mechanism 2 is separated from the surface of the valve body 3, and most of the sealing grease in the injection air bags 5 is sucked back into the storage tank mechanism 2, which can reduce the wear between the valve seats 6 and the injection air bags 5 when the gate plate 1 is opened, make the opening of the gate plate 1 more smooth, and further improve the reliability and service life of the valve.

[0026] Embodiment 2: As shown in Figures 1-13 two annular sealing grooves are arranged on the two sides of the sealing plate area of the gate plate 1, and the inner sides of the two valve seats 6 can be inserted into the two annular sealing grooves; the two air bag grooves are coaxially arranged on the inner sides of the two annular sealing grooves to be sealingly fitted with the inner end faces of the two valve seats 6 inserted into the two annular sealing grooves. The contact part between the annular sealing groove and the valve seat 6 is provided with a chamfer or a round corner to make the valve seat 6 slide into the inner side of the annular sealing groove or slide out of the outer side of the annular sealing groove when the gate plate 1 moves. The inner side surface of the injection air bag 5 is glued and fixed on the inner side surface of the air bag groove.

[0027] The working principle and technical effects of the above scheme are: Two annular sealing grooves are arranged opposite each other on both sides of the sealing plate area of ​​the gate 1, and the inner sides of the two valve seats 6 can be inserted into the two annular sealing grooves. When the gate 1 moves downward to close the valve, the valve seats 6 will gradually slide into the annular sealing grooves; when the gate 1 moves upward to open the valve, the valve seats 6 will slide out of the annular sealing grooves. The contact point between the annular sealing groove and the valve seat 6 is chamfered or rounded. This design plays a guiding role, allowing the valve seats 6 to slide more smoothly into or out of the annular sealing groove when the gate 1 moves. This mating method increases the sealing path and sealing area when the valve is closed. The presence of multiple sealing surfaces, such as the side contact between the annular sealing groove and the valve seat 6, can further enhance the sealing performance of the valve and more effectively prevent media leakage compared to a single sealing surface. At the same time, the chamfered or rounded design reduces the friction and collision between the valve seat 6 and the annular sealing groove, reduces component wear, extends the service life of the valve seat 6 and the gate 1, and improves the reliability and stability of the valve.

[0028] Two air bladder grooves are coaxially positioned inside two annular sealing grooves. When the valve seat 6 is inserted into the annular sealing groove, the air bladder groove can seal against the inner end faces of the two inserted valve seats 6. During the downward movement of the gate 1 to close the valve, the tank mechanism 2 is pressurized to force the sealing grease into the injection air bladder 5. The injection air bladder 5 expands, further tightening against the inner end face of the valve seat 6, forming a seal. This makes the seal more comprehensive and reliable. Based on the initial seal provided by the annular sealing groove, the sealing fit between the injection air bladder 5 and the inner end face of the valve seat 6 further enhances the sealing effect, effectively preventing minor leaks and ensuring that the valve's sealing performance reaches a higher standard. Moreover, the elasticity of the injection air bladder 5 can adapt to minor positional deviations and deformations between the valve seat 6 and the gate 1, improving the adaptability and stability of the seal. The inner surface of the injection air bladder 5 is glued and fixed to the inner surface of the air bladder groove. During the process of injecting sealing grease to expand the air bladder or withdrawing sealing grease to contract the air bladder, the injection air bladder 5 can maintain a relatively stable position and will not shift or fall off.

[0029] Example 3: As Figures 1-13 As shown, the storage tank mechanism 2 includes two pre-storage injection components 7 connected relative to each other by bolts and nuts. The annular structure formed by the two pre-storage injection components 7 is fitted into the annular grooves opened on both sides of the upper part of the gate plate 1. The two pre-storage injection components 7 are connected to the two injection airbags 5 one by one.

[0030] The working principle and technical effects of the above scheme are as follows: The storage tank mechanism 2 is composed of two pre-injection assemblies 7 connected to each other by bolts and nuts, which are tightly combined to form a ring structure, and the ring structure is sleeved in the ring groove opened on both sides of the upper part of the gate plate 1, so as to fix the relative position between the storage tank mechanism 2 and the gate plate 1. When the gate plate 1 moves up and down, the storage tank mechanism 2 moves synchronously with the gate plate 1. At the same time, the two pre-injection assemblies 7 are connected with the two injection air bags 5 one by one to provide a channel for the transmission of the sealing grease. The assembly structure makes the installation and disassembly of the storage tank mechanism 2 convenient. When the equipment is maintained, repaired or replaced, the two pre-injection assemblies 7 can be easily separated by disassembling the bolts and nuts, so as to clean, check or replace the sealing grease. Moreover, the ring structure is sleeved in the ring groove of the gate plate 1, which enhances the stability of the connection between the storage tank mechanism 2 and the gate plate 1, and ensures that the storage tank mechanism 2 does not shake or shift during the movement of the gate plate 1, thereby ensuring the normal operation of the entire sealing system.

[0031] Embodiment 4: As shown in Figures 1-13 The pre-injection assembly 7 includes a semi-annular box body 701 with a top sealing connection box cover 702, two injection holes of the box cover 702 are connected with one end of two injection pipes 703, the middle part of the two injection pipes 703 is sealingly fixed in the longitudinal pipe passage on the upper surface of the gate plate 1, and the two injection pipes 703 penetrate into the injection air bag 5 at one end. A semi-annular piston disc 704 is sealingly and slidingly connected in the semi-annular box body 701, the lower surface of the semi-annular piston disc 704 is fixedly connected with the top of a plurality of bearing shafts 705, the middle part of the plurality of bearing shafts 705 is slidingly fitted on the bottom surface of the semi-annular box body 701, and the bottom of the plurality of bearing shafts 705 is connected with a pressure control plate 706 used for abutting and matching the upper surface of the valve body 3. The semi-annular piston disc 704 and the bottom surface of the semi-annular box body 701 are connected by a plurality of reset tension springs 707 which can be stretched. When the gate plate 1 does not close the medium passage, the reset tension springs 707 are in an unstretched state, at this time, the semi-annular piston disc 704 is arranged close to the bottom surface of the semi-annular box body 701, and a storage area for storing sealing grease is formed between the semi-annular piston disc 704 and the box cover 702. When the sealing plate area on the upper part of the gate plate 1 gradually closes the medium passage of the valve body 3, the pre-injection assembly 7 connected with the gate plate 1 moves downward together with the gate plate 1, and when the pressure control plate 706 moves downward by a certain distance, the pressure control plate 706 contacts the upper surface of the valve body 3. At this time, as the pressure control plate 706 continues to move downward, the plurality of bearing shafts 705 slide on the bottom surface of the semi-annular box body 701 and push the semi-annular piston disc 704 to move in the semi-annular box body 701 close to the box cover 702, so as to press the sealing grease between the semi-annular piston disc 704 and the box cover 702 into the injection air bag 5 connected with the two injection pipes 703.

[0032] The working principle and technical effects of the above scheme are as follows: When the gate plate 1 does not close the medium channel, the reset tension spring 707 is not stretched, the semi-annular piston disc 704 is close to the bottom surface of the semi-annular box 701, and the storage area filled with sealing grease is formed between the semi-annular piston disc 704 and the box cover 702. The pre-storage injection assembly 7 can effectively store the sealing grease, and the reset tension spring 707 provides a power basis for subsequent extraction of the sealing grease. When the sealing plate area at the upper part of the gate plate 1 gradually closes the medium channel of the valve body 3, the pre-storage injection assembly 7 descends with the gate plate 1. When the pressure control plate 706 contacts the upper surface of the valve body 3 after moving downward by a certain distance, the plurality of bearing shafts 705 slide on the bottom surface of the semi-annular box 701 and push the semi-annular piston disc 704 to move towards the box cover 702 in the semi-annular box 701. At this time, the sealing grease between the semi-annular piston disc 704 and the box cover 702 is pressed into the injection air bag 5 connected thereto through the two injection pipes 703, so that the injection air bag 5 is inflated and tightly attached to the valve seat 6 to achieve sealing. This process realizes the automatic injection of sealing grease when the valve is closed, and is closely matched with the closing action of the valve. No additional external power or manual intervention is required. Through the linkage of the pressure control plate 706, the bearing shaft 705 and the semi-annular piston disc 704, the sealing grease can be accurately delivered to the injection air bag 5, thereby enhancing the sealing performance of the valve. Moreover, the injection method has high reliability and reduces the risk of sealing failure caused by factors such as electronic component failure.

[0033] When the gate plate 1 moves upward to open the valve, the pressure control plate 706 separates from the upper surface of the valve body 3, and the reset tension spring 707 returns to its original state from the stretched state, thereby pulling the semi-annular piston disc 704 to move towards the bottom surface of the semi-annular box 701. At this time, the movement of the semi-annular piston disc 704 in the semi-annular box 701 forms a negative pressure, so that most of the sealing grease in the injection air bag 5 is extracted through the injection pipe 703 to the storage area between the semi-annular piston disc 704 and the box cover 702. The plurality of reset tension springs 707 provide power for the extraction of the sealing grease, so that the sealing grease in the injection air bag 5 can be extracted in time when the valve is opened, thereby reducing the wear between the valve seat 6 and the injection air bag 5 when the gate plate 1 is opened, making the opening of the gate plate 1 more smooth, and further improving the reliability and service life of the valve. At the same time, the extraction of the sealing grease also prepares for the injection of the sealing grease when the valve is closed next time, thereby ensuring the sustainable operation of the sealing system.

[0034] Example 5: as Figures 1-13As shown, the top of the gate plate 1 is connected with the valve rod 8 sliding in the center hole of the valve cover 4, the top of the valve rod 8 is provided with the grease storage groove 801 connected with the two pre-stored injection assemblies 7, the one-way supplement mechanism 9 is installed in the grease storage groove 801, so that the grease above the one-way supplement mechanism 9 is supplemented and transported to the below of the one-way supplement mechanism 9. The one-way supplement mechanism 9 comprises: the partition disc 901 installed in the grease storage groove 801, the partition disc 901 separates the upper and lower sides of the inside of the grease storage groove 801 into the adding area and the supplement area, the supplement area is connected with the supplement port on the tank cover 702 through the supplement pipe arranged on the side of the valve rod 8; the vertical sliding shaft 902 is slidingly connected in the vertical through hole in the middle of the partition disc 901, the side wall of the vertical sliding shaft 902 is uniformly surrounded by the plurality of flow guide grooves 903, the plurality of flow guide grooves 903 form the grease flow path with the inner wall of the vertical through hole, the top of the vertical sliding shaft 902 is fixedly connected with the limiting ring 904 used for clamping the upper surface of the partition disc 901, the bottom of the vertical sliding shaft 902 is fixedly connected with the anti-backflow conical head 905 used for blocking the conical through hole in the bottom of the partition disc 901, the vertical through hole and the conical through hole are coaxially communicated; the bottom of the anti-backflow conical head 905 is provided with the inverted conical pressure head 906; the lower surface of the partition disc 901 is fixedly connected with the annular sealing ring 907, the anti-backflow conical head 905 is provided with the annular insertion slot used for inserting and cooperating with the annular sealing ring 907.

[0035] The working principle and technical effects of the above scheme are as follows: The sealing grease stored in the adding area of the sealing grease storage tank 801 is used to supplement the two pre-storage injection assemblies 7. When the sealing grease in the supplement area of the sealing grease storage tank 801 and the two pre-storage injection assemblies 7 is sufficient, the sealing grease in the supplement area of the sealing grease storage tank 801 generates buoyancy and upward pressure on the inverted conical pressure head 906, so that the inverted conical pressure head 906 drives the anti-backflow conical head 905 to block the conical through hole at the bottom of the partition disc 901. At this time, the sealing grease in the adding area of the sealing grease storage tank 801 cannot flow into the supplement area of the sealing grease storage tank 801. When the pre-storage injection assembly 7 is lost, the sealing grease in the supplement area of the sealing grease storage tank 801 enters the pre-storage injection assembly 7 that needs to be supplemented through the supplement pipe on the side of the valve rod 8 and the supplement port on the box cover 702 under the action of gravity. At this time, the sealing grease in the supplement area of the sealing grease storage tank 801 is insufficient, so that the buoyancy generated by the sealing grease on the inverted conical pressure head 906 is insufficient. The inverted conical pressure head 906 and the anti-backflow conical head 905 move downward under their own gravity, so that the anti-backflow conical head 905 gradually unblocks the conical through hole at the bottom of the partition disc 901. At this time, the sealing grease in the adding area of the sealing grease storage tank 801 can flow into the supplement area of the sealing grease storage tank 801 through the sealing grease flow path formed by the plurality of flow guide grooves 903 and the inner wall of the vertical through hole, so as to further supplement the sealing grease into the pre-storage injection assembly 7 that needs to be supplemented. The limiting ring 904 is provided with a guide hole matched with the plurality of flow guide grooves 903, so that the sealing grease can still flow downward when the limiting ring 904 is clamped on the upper surface of the partition disc 901. After the sealing grease in the supplement area is supplemented, the upward pressure on the inverted conical pressure head 906 makes the inverted conical pressure head 906 drive the anti-backflow conical head 905 to re-block the conical through hole at the bottom of the partition disc 901. When the pre-storage injection assembly 7 pressurizes the sealing grease into the injection air bag 5, although part of the sealing grease may enter the supplement area of the sealing grease storage tank 801, as the pressure increases, it will only generate upward pressure on the inverted conical pressure head 906, and the anti-backflow conical head 905 will not produce backflow when it re-blocks the conical through hole at the bottom of the partition disc 901.

[0036] During the long-term use of the valve, the sealing grease in the pre-stored injection assembly 7 will gradually decrease due to the opening and closing action of the valve, the consumption of the sealing process, etc. If the sealing grease cannot be replenished in time, the sealing effect of the injection air bag 5 will decrease, which will affect the sealing performance of the valve on the medium channel and cause problems such as medium leakage. The present application solves the problem of automatic replenishment of sealing grease by setting the sealing grease storage groove 801 and the one-way replenishment mechanism 9. When the pre-stored injection assembly 7 loses sealing grease, the sealing grease in the replenishment area of the sealing grease storage groove 801 enters the pre-stored injection assembly 7 through the replenishment pipe on the side of the valve stem 8 and the replenishment port on the box cover 702 under the action of gravity. When the sealing grease in the replenishment area is insufficient, the one-way replenishment mechanism 9 is automatically opened, so that the sealing grease in the addition area flows into the replenishment area through the flow guide groove 903, realizing the automatic replenishment of the sealing grease and ensuring the sufficiency of the sealing grease in the pre-stored injection assembly 7.

[0037] During the process of pressing the sealing grease into the injection air bag 5 by the pre-stored injection assembly 7, part of the sealing grease may enter the replenishment area of the sealing grease storage groove 801 in reverse. Without effective anti-backflow measures, the sealing grease may flow disorderly in the system, affecting the normal replenishment and use of the sealing grease and reducing the stability of the valve sealing system. The anti-backflow conical head 905 and the inverted conical pressure head 906 in the one-way replenishment mechanism 9 of the present application play the role of anti-backflow. When the sealing grease in the replenishment area is sufficient, the buoyancy of the sealing grease drives the inverted conical pressure head 906 to block the conical through hole at the bottom of the partition disc 901; when the pre-stored injection assembly 7 pressurizes and sends the sealing grease to increase the pressure in the replenishment area, the inverted conical pressure head 906 will also be subjected to upward pressure, so that the anti-backflow conical head 905 re-blocks the conical through hole to prevent the sealing grease from flowing back to the addition area.

[0038] In this invention, sufficient sealing grease is stored in the addition area of ​​the sealing grease storage tank 801, and the one-way replenishment mechanism 9 can automatically replenish the grease according to the loss of sealing grease in the pre-stored injection component 7. When the sealing grease in the pre-stored injection component 7 decreases, the sealing grease in the replenishment area is replenished first. If it is insufficient, the sealing grease in the addition area flows into the replenishment area and then replenishes the pre-stored injection component 7, ensuring that the injection bladder 5 can continuously obtain sufficient sealing grease, so that it always fits tightly against the valve seat 6, maintains a good sealing effect, and improves the stability of the valve sealing performance. The separator 901 divides the sealing grease storage tank 801 into an addition area and a replenishment area. When the sealing grease is sufficient, the anti-backflow cone head 905 blocks the cone-shaped through hole to prevent the sealing grease in the addition area and the replenishment area from mixing and flowing randomly, ensuring the orderly distribution and use of sealing grease in the system, and further improving the stability of the sealing performance. The unidirectional replenishment mechanism 9 utilizes the buoyancy of the sealing grease in the replenishment zone and the gravity of the inverted conical pressure head 906 and the anti-backflow conical head 905 to automatically open and close, eliminating the need for frequent manual intervention and reducing sealing problems caused by human error. Furthermore, it can operate continuously and stably during long-term valve use, ensuring the reliability of the valve sealing system. The anti-backflow structure composed of the anti-backflow conical head 905 and the inverted conical pressure head 906 effectively prevents the backflow of sealing grease, avoiding damage to the system caused by disordered flow of sealing grease within the system. Simultaneously, the cooperation between the annular sealing ring 907 and the annular slot further enhances the sealing effect, reduces the possibility of sealing grease leakage, extends the service life of the valve sealing system, and improves the system's durability.

[0039] Example 6: As Figures 1-13 As shown, the separator 901 is sealed and slidably fitted within the upper and lower restricted areas of the grease storage tank 801; the top of the separator 901 is fixedly connected to the portal frame 908, the portal frame 908 is rotatably connected to the bottom of the adjusting screw 909, and the middle part of the adjusting screw 909 is threadedly connected to the support at the top of the grease storage tank 801.

[0040] The working principle and technical effects of the above scheme are as follows: By rotating the adjusting screw 909, the middle part of which is threadedly connected to the support at the top of the grease storage tank 801, the adjusting screw 909 will move up and down when rotated. Since the bottom of the adjusting screw 909 is rotatably connected to the gantry frame 908, and the gantry frame 908 is fixed to the top of the partition plate 901, the up and down movement of the adjusting screw 909 can drive the partition plate 901 to slide within the upper and lower restricted areas of the grease storage tank 801, thereby changing the volume of the adding area and the replenishing area within the grease storage tank 801.

[0041] In actual application scenarios, the demand for sealing grease by the valve under different working conditions can be quite different. The fixed volume sealing grease storage tank of the past cannot meet the diversified needs. This scheme can accurately adjust the volume ratio of the adding area and the replenishing area according to specific working conditions, such as the use frequency of the valve, medium pressure and temperature, and other factors. For example, in the working condition of high temperature, high pressure and frequent opening and closing of the valve, the volume of the replenishing area can be increased by rotating the control screw 909 to move the partition disc 901 upward, so that more sealing grease can be quickly replenished into the pre-storage injection assembly 7 to ensure the sealing performance of the valve. In relatively stable working conditions, the volume of the replenishing area can be appropriately reduced to make the sealing grease storage more reasonable and avoid waste. This precise control is not available in traditional sealing grease storage structures, bringing unexpected results.

[0042] Different types of sealing grease have different viscosity, flowability and other characteristics. When using sealing grease with different characteristics, the flow and replenishment of the sealing grease in the sealing grease storage tank 801 will also be different. By rotating the control screw 909 to change the position of the partition disc 901, the distribution and flow path of the sealing grease in the adding area and the replenishing area can be adjusted. For high-viscosity sealing grease, its flowability is poor and may not be smooth enough during the replenishment process. At this time, the position of the partition disc 901 can be lowered by rotating the control screw 909 to reduce the height of the replenishing area, so that the sealing grease can more easily flow to the replenishing area and enter the pre-storage injection assembly 7 under the action of gravity. For low-viscosity sealing grease, to prevent it from flowing too fast and causing waste or poor sealing effect, the position of the partition disc 901 can be appropriately raised to increase the height of the adding area, which can buffer and control the flow of the sealing grease to a certain extent. This flexible adaptability to different sealing grease characteristics is an unexpected technical effect brought by this scheme, which widens the applicability of the valve sealing system to different sealing greases.

[0043] Embodiment 7: as shown in Figures 1-13 The single-plate flat valve has good stability and long service life.

[0044] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In this application, unless otherwise clearly indicated and limited, the terms "mounting", "connection", "connecting", "fixed", and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application, and additional modifications can be easily realized by those skilled in the art, and therefore the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A sealing grease injection structure, characterized in that, include: The storage tank mechanism is connected to the gate and is located within the accommodating area formed between the valve body and the valve cover. The upper part of the gate has a sealing plate area for closing the medium passage of the valve body, and the lower part of the gate has an opening for opening the medium passage of the valve body. The storage tank mechanism is connected to two injection airbags in the airbag grooves on both sides of the gate sealing plate area. The two injection airbags cooperate with two valve seats installed in the valve body. When the gate moves downward to close the medium passage with the sealing plate area, the storage tank mechanism contacts the upper surface of the valve body, causing the sealing grease in the storage tank mechanism to be pressed into the two injection airbags. When the gate moves upward to open the medium passage with the opening, the storage tank mechanism separates from the upper surface of the valve body, causing the sealing grease in the two injection airbags to be drawn back into the storage tank mechanism.

2. The sealing grease injection structure according to claim 1, characterized in that, Two annular sealing grooves are provided on opposite sides of the gate sealing plate area, and the inner sides of the two valve seats can be inserted into the two annular sealing grooves; two airbag grooves are coaxially arranged on the inner sides of the two annular sealing grooves to seal and fit with the inner end faces of the two valve seats inserted into the two annular sealing grooves.

3. The sealing grease injection structure according to claim 2, characterized in that, The contact area between the annular sealing groove and the valve seat is chamfered or rounded so that the valve seat can slide into the inner side of the annular sealing groove or slide out to the outer side of the annular sealing groove when the gate moves.

4. The sealing grease injection structure according to claim 1, characterized in that, The storage tank mechanism includes: two pre-storage injection components connected by bolts and nuts, the annular structure formed by the two pre-storage injection components being fitted into the annular grooves opened on both sides of the upper part of the gate; the two pre-storage injection components are connected to two injection airbags one by one.

5. The sealing grease injection structure according to claim 4, characterized in that, The pre-stored injection assembly includes: a semi-annular housing with a top-sealed connection to a cover; two injection holes on the cover connected to one end of two injection tubes, the middle of the two injection tubes being sealed and fixed within a longitudinal through-tube channel on the upper surface of the gate plate, and the two injection tubes penetrating to the airbag groove and connected to the injection airbag at one end; a semi-annular piston disc being slidably connected to the inside of the semi-annular housing, the lower surface of the semi-annular piston disc being fixedly connected to the top of multiple bearing shafts, the middle of the multiple bearing shafts being slidably fitted on the bottom surface of the semi-annular housing, and the bottom of the multiple bearing shafts being connected to a pressure control plate for contacting the upper surface of the valve body; the semi-annular piston disc and the bottom surface of the semi-annular housing are connected by multiple stretchable reset springs.

6. The sealing grease injection structure according to claim 5, characterized in that, The inner side of the injected airbag is glued and fixed to the inner side of the airbag groove.

7. The sealing grease injection structure according to claim 5, characterized in that, The top of the gate is connected to the valve stem, which is slidably installed in the center hole of the valve cover. The top of the valve stem is provided with a grease storage tank that is connected to two pre-stored injection components. A one-way replenishment mechanism is installed in the grease storage tank so that the grease above the one-way replenishment mechanism is unidirectionally replenished and transported to the bottom of the one-way replenishment mechanism.

8. The sealing grease injection structure according to claim 7, characterized in that, The unidirectional replenishment mechanism includes: a partition plate installed inside the grease storage tank, which divides the upper and lower sides of the grease storage tank into an addition area and a replenishment area. The replenishment area is connected to the replenishment port on the tank cover via a replenishment pipe located on the side of the valve stem; a vertical sliding shaft is slidably connected inside a vertical through hole in the middle of the partition plate, and multiple guide grooves are evenly arranged around the side wall of the vertical sliding shaft. The multiple guide grooves and the inner wall of the vertical through hole form a grease flow path. A limiting ring is fixed to the top of the vertical sliding shaft for locking onto the upper surface of the partition plate, and an anti-backflow cone head is fixed to the bottom of the vertical sliding shaft for sealing the tapered through hole at the bottom of the partition plate. The vertical through hole and the tapered through hole are coaxially connected; the bottom of the anti-backflow cone head is provided with an inverted conical pressure bearing head; an annular sealing ring is fixed to the lower surface of the partition plate, and an annular slot for inserting and mating with the annular sealing ring is provided on the anti-backflow cone head.

9. The sealing grease injection structure according to claim 8, characterized in that, The separator is sealed and slidably fitted within the upper and lower restricted areas of the grease storage tank; a gantry frame is fixedly connected to the top of the separator, and the gantry frame is rotatably connected to the bottom of the regulating screw, with the middle of the regulating screw threadedly connected to the support at the top of the grease storage tank.

10. A single-plate flat valve, characterized in that, Includes a grease injection structure as described in any one of claims 1-9.

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