Elephant trunk knife-shaped gate valve

Abstract

The invention relates to the technical field of valves, in particular to an elephant trunk knife-shaped gate valve. Comprising; the bottom and the top of the valve body are provided with a medium channel allowing a medium to penetrate through and a sliding groove communicated with the medium channel respectively. The sealing module is vertically arranged in the sliding groove of the valve body in a sliding mode, and the sealing module is provided with a first gate plate and a second gate plate which can seal the medium channel and are hinged end to end; when the first gate plate and the second gate plate move to a second stroke, the second gate plate is inclined to be attached to the medium channel to achieve sealing; the control module is vertically and fixedly arranged at the top of the valve body; the control module is provided with a driving screw capable of driving the first gate plate and the second gate plate to slide in the sliding grooves. According to the invention, material accumulation and clamping stagnation can be effectively prevented, and the knife switch can be radially sealed.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to a chute knife gate valve. Background Technology

[0002] Siphon knife gate valves are commonly used in systems transporting powders, granular materials, or fluids containing certain solid impurities to control the opening and closing of chute passages. Existing chute knife gate valves typically achieve the opening or closing of the fluid passage by the linear movement of a gate within the valve body. Their sealing structure is usually located between the gate and the valve body to create a barrier against the medium.

[0003] In existing technologies, the sealing method of chute knife gate valves mostly relies on a friction seal structure formed by the mutual compression between the gate and the sealing ring. During the valve opening and closing process, there is frequent relative sliding between the gate and the sealing ring, which can easily accelerate the wear of the sealing ring over long-term use, causing the sealing performance to change with the time of use, thereby affecting the sealing reliability of the valve.

[0004] On the other hand, in actual use environments, dust, particles, or other impurities easily adhere to the surface of the gate of a chute knife gate valve. If these foreign objects are not effectively removed during the gate's closing process, they may remain between the gate and the sealing ring, making it difficult for them to form a complete seal, thus adversely affecting the sealing effect. Furthermore, repeated compression by foreign objects may accelerate localized wear of the sealing ring, further impacting the sealing performance. Summary of the Invention

[0005] To address the aforementioned issues, a chute knife gate valve is provided. This valve effectively prevents material accumulation and jamming, improves the stability of gate opening and closing, and enhances sealing performance. This solves the technical problems of existing knife gate valves, such as material accumulation, high opening and closing resistance, and leakage due to excessive wear of the sealing ring.

[0006] To address the problems of existing technologies, this invention provides a chute knife gate valve, comprising: a valve body, wherein the bottom and top of the valve body are respectively provided with a medium channel for medium to pass through and a groove communicating with the medium channel; a sealing module, vertically slidably disposed within the groove of the valve body, the sealing module having a first gate and a second gate that are hinged end to end and capable of sealing the medium channel; when the first gate and the second gate are displaced to a second stroke position, the second gate is inclined and fits against the medium channel to achieve a seal; and a control module, vertically fixedly disposed at the top of the valve body; the control module having a drive screw capable of driving the first gate and the second gate to slide within the groove.

[0007] Preferably, the valve body is further provided with a guide sealing plate that can guide the second gate to slide tilted within the medium channel and a sealing ring that can flexibly abut against the second gate; the guide sealing plate is inclined and opened at the bottom of the medium channel; the sealing ring is inclined and fixedly disposed within the medium channel and close to the right side of the valve body.

[0008] Preferably, the valve body is further provided with a scraper strip capable of scraping slag from the sealing surface of the second gate; the scraper strip is fixedly arranged horizontally on the right side of the slide groove and close to the medium channel.

[0009] Preferably, the included angle between the sealing ring and the second gate is an acute angle.

[0010] Preferably, the sealing module further includes a first hinge portion and a second hinge portion; the first hinge portion and the second hinge portion are respectively fixedly disposed at the lower end of the first gate and the upper end of the second gate; the first gate and the second gate are hinged together by the first hinge portion and the second hinge portion.

[0011] Preferably, the lower edge of the second gate is further provided with an arc-shaped wedge that can fit with the guide plate.

[0012] Preferably, the control module further includes a mounting bracket and a drive unit capable of driving the drive screw to slide longitudinally; the drive unit is fixedly mounted vertically on the top of the valve body via the mounting bracket, and the drive unit is throttle connected to the drive screw.

[0013] Preferably, a guide block capable of limiting and guiding the second gate is also fixedly disposed in the valve body; the guide block is fixedly disposed in the slide groove and disposed on the side away from the sealing ring.

[0014] The advantages of this invention compared to the prior art are: 1. This invention sets up a segmented sealing structure with a first gate and a second gate, and under the guidance of the guide plate, the second gate is made to fit against the sealing ring in a controlled tilting manner. This avoids the long-stroke frictional sliding between the traditional gate and the sealing ring during the opening and closing process, thereby effectively reducing the wear of the sealing ring during repeated opening and closing and helping to extend the service life of the sealing structure.

[0015] 2. The present invention provides a scraper on the sliding path of the first and second gates to pre-clean the sealing surfaces of the first and second gates before they enter the sealing area. This reduces the possibility of foreign matter such as media residue and particulate impurities getting trapped between the first and second gates and the sealing ring, thereby improving the problem of poor sealing caused by foreign matter on the surfaces of the first and second gates. Attached Figure Description

[0016] Figure 1 This is a 3D view of a chute knife gate valve.

[0017] Figure 2 This is the front view of a chute knife gate valve.

[0018] Figure 3 yes Figure 2 Sectional view at point AA.

[0019] Figure 4 yes Figure 3 A magnified view of section B.

[0020] Figure 5 yes Figure 3 A magnified view of a portion of point C.

[0021] Figure 6 yes Figure 3 A magnified view of a portion of point D.

[0022] Figure 7 This is an exploded 3D view of a chute knife gate valve.

[0023] Figure 8 This is an exploded 3D view of a chute knife gate valve with the control module removed.

[0024] The numbers on the map are: 1. Valve body; 11. Medium passage; 12. Slide groove; 13. Guide sealing plate; 14. Sealing ring; 15. Guide block; 2. Sealing module; 21. First gate; 22. Second gate; 221. Arc-shaped wedge; 23. Scraper; 24. First hinge; 25. Second hinge; 3. Control module; 31. Drive screw; 32. Mounting bracket; 33. Drive unit. Detailed Implementation

[0025] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0026] See Figures 1 to 8As shown: a chute knife gate valve, comprising: a valve body 1, wherein the bottom and top of the valve body 1 are respectively provided with a medium channel 11 for medium to pass through and a slide groove 12 communicating with the medium channel 11; a sealing module 2, which is vertically slidably disposed in the slide groove 12 of the valve body 1, the sealing module 2 having a first gate 21 and a second gate 22 that can seal the medium channel 11 and are hinged at both ends; when the first gate 21 and the second gate 22 are displaced to the second stroke position, the second gate 22 is inclined and fits against the medium channel 11 to achieve sealing; and a control module 3, which is vertically fixedly disposed on the top of the valve body 1; the control module 3 having a drive screw 31 that can drive the first gate 21 and the second gate 22 to slide in the slide groove 12.

[0027] When sealing of the medium channel 11 is required, the control module 3 drives the sealing module 2 to perform a sealing action. Under the drive of the control module 3, the first gate 21 and the second gate 22 slide synchronously from their corresponding first stroke positions towards the second stroke position along a predetermined direction. During this process, the first gate 21 and the second gate 22 simultaneously enter the interior of the medium channel 11, progressively blocking the opening area of ​​the medium channel 11, thereby achieving a gradual closure of the medium channel 11. When the first gate 21 and the second gate 22 have completely moved to the second stroke position, the second gate 22 is located at the closed position of the medium channel 11, forming a stable limiting and blocking state for the medium channel 11, thus completing the sealing control of the medium channel 11.

[0028] See Figure 7 and Figure 8 As shown: The valve body 1 is also provided with a guide sealing plate 13 that can guide the second gate 22 to slide tilted within the medium channel 11 and a sealing ring 14 that can flexibly abut against the second gate 22; the guide sealing plate 13 is inclined and opened at the bottom of the medium channel 11; the sealing ring 14 is inclined and fixedly disposed within the medium channel 11 and close to the right side of the valve body 1.

[0029] The valve body 1 also includes a fixing ring, and the sealing ring 14 is fixedly disposed in the medium channel 11 in an inclined state by the fixing ring.

[0030] When the sealing module 2 is driven by the control module 3 to slide longitudinally to seal the medium channel 11, the first gate 21 and the second gate 22 move from the first stroke position to the second stroke position under the drive of the drive screw 31. When moving close to the second stroke position, the lower end of the second gate 22 first abuts against the guide plate 13, and during the continued downward movement, it undergoes controlled deflection under the limiting and guiding effect of the guide plate 13, causing the second gate 22 to change from its original longitudinal sliding state to an inclined sliding state. As the inclined sliding continues, the sealing surface of the second gate 22 gradually comes into contact with the sealing ring 14, finally completing the sealing of the medium channel 11. Since the second gate 22 comes into contact with the sealing ring 14 in an inclined manner under the guidance of the guide plate 13, direct friction and sliding between the sealing surfaces of the first gate 21 and the second gate 22 and the sealing ring 14 are avoided.

[0031] The guide plate 13 guides the second gate 22 to tilt and fit against the sealing ring 14, achieving non-frictional contact sealing and significantly reducing the wear of the sealing ring 14 during the opening and closing process.

[0032] See Figure 4 As shown: A scraper 23 capable of scraping slag from the sealing surface of the second gate 22 is also fixedly installed inside the valve body 1; the scraper 23 is fixedly installed horizontally on the right side of the slide groove 12 and close to the medium channel 11.

[0033] When the drive screw 31 longitudinally drives the first gate 21 and the second gate 22 to slide along the slide groove 12, before the first gate 21 and the second gate 22 enter the sealing area, the sealing surfaces of the first gate 21 and the second gate 22 are simultaneously scraped clean by the scraper 23 set on the movement path to remove media residue, particulate impurities or dust adhering to the sealing surfaces. The sealing surfaces treated by the scraper 23 fit with the sealing ring 14 in the subsequent sealing process, which can reduce the impact of foreign matter inclusions on the sealing fit.

[0034] By pre-cleaning the sealing surfaces of the first gate 21 and the second gate 22 before sealing, the interference of foreign matter on the sealing fit is effectively reduced, and the consistency and reliability of the sealing state are improved.

[0035] See Figure 4 and Figure 5 As shown: the included angle between the sealing ring 14 and the second gate 22 is an acute angle.

[0036] By setting the included angle between the second gate 22 and the sealing ring 14 to an acute angle, the sealing ring 14 is arranged at an angle relative to the second gate 22, and this angle is controlled within a small range. During the process of the second gate 22 longitudinally closing the medium channel 11, the second gate 22 will not have direct contact with the sealing ring 14; when sealing is required, the second gate 22 only needs to be tilted slightly under the action of the guide structure to make its sealing surface fit with the sealing ring 14, thereby completing the sealing.

[0037] A small-angle tilt is used to achieve a tight seal, which balances the reliability of the seal with the durability of the structure and reduces the risk of structural interference during the opening and closing of the first gate 21 and the second gate 22.

[0038] See Figure 7 As shown: The sealing module 2 further includes a first hinge portion 24 and a second hinge portion 25; the first hinge portion 24 and the second hinge portion 25 are respectively fixedly disposed at the lower end of the first gate plate 21 and the upper end of the second gate plate 22; the first gate plate 21 and the second gate plate 22 are hinged together by the first hinge portion 24 and the second hinge portion 25.

[0039] The first hinge shaft and the second hinge shaft are connected by a sealed connection, so that they form a continuous sealed structure when connected. At the same time, the total length of the first hinge shaft and the second hinge shaft matches the length of the long side of the slide groove 12, so that the hinge structure is always within the effective guiding range of the slide groove during the sliding process.

[0040] See Figure 5 and 7 As shown: The lower edge of the second gate 22 is also provided with an arc-shaped wedge 221 that can fit with the guide plate 13.

[0041] An arc-shaped notch is provided at the lower edge of the second gate 22 to match the guide sealing plate 13. When the drive screw 31 drives the first gate 21 and the second gate 22 to the second stroke position, the arc-shaped notch forms a limited insertion fit after contacting the guide sealing plate 13, so that the second gate 22 inserts into the guide sealing plate 13 at a preset angle when it approaches the end stroke. Under the continuous guidance of the guide sealing plate 13, the sealing surface of the second gate 22 is finally pressed against the sealing ring 14, thereby sealing the medium channel 11.

[0042] By cooperating with the arc-shaped notch and the guide plate 13, the second gate 22 is guided to complete the sealing action at a controlled tilt angle, thereby improving the repeatability and stability of the sealing process.

[0043] See Figure 6As shown: The control module 3 further includes a mounting bracket 32 ​​and a drive unit 33 capable of driving the drive screw 31 to slide longitudinally; the drive unit 33 is fixedly mounted vertically on the top of the valve body 1 via the mounting bracket 32, and the drive unit 33 is connected to the drive screw 31 in a transmission connection.

[0044] The drive unit 33 can be a handwheel valve stem nut mechanism or a lifting handwheel mechanism, and its function is to provide a stable lifting driving force for the drive screw 31. When it is necessary to open, close and seal the medium channel 11, it is only necessary to operate the drive unit 33 to make the drive screw 31 rise and fall in the longitudinal direction, which can simultaneously drive the first gate 21 and the second gate 22 to complete the opening and closing movement in the slide groove.

[0045] See Figure 4 As shown: A guide block 15 is also fixedly installed inside the valve body 1, which can limit and guide the second gate 22; the guide block 15 is fixedly installed inside the slide groove 12 and is located on the side away from the sealing ring 14.

[0046] The guide block 15 is provided with at least one.

[0047] When the control module 3 drives the sealing module 2 to seal the medium channel 11, at least one guide block 15 constrains the movement posture of the second gate 22 during the entire downward movement process, so that the second gate 22 always maintains a longitudinal insertion state when entering the medium channel 11. Only after the second gate 22 comes into contact with the guide sealing plate 13 will it tilt and shift under the cooperative action of the guide sealing plate 13 and the guide block 15, and further fit with the sealing ring 14 to complete the seal.

[0048] By limiting the timing of gate attitude changes through guide block 15, the gate is prevented from tilting prematurely during the process of entering the medium channel 11, thereby improving the controllability of the sealing action.

[0049] This invention can not only effectively prevent material accumulation and jamming, but also provide radial sealing for the knife gate.

[0050] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A pipe-snooping gate valve, characterized by The utility model relates to a valve body, the bottom and the top of the valve body are provided with medium channel and chute for medium respectively, sealing module is arranged in the chute of valve body, sealing module is provided with first shutter and second shutter which can seal medium channel and are hinged at the head and tail, when the first shutter and the second shutter are displaced to the second stroke, the second shutter is inclined and is combined with the medium channel to realize sealing, control module is arranged vertically in the top of valve body, control module is provided with drive screw which can drive the first shutter and the second shutter to slide in the chute. The valve body is also provided with a guide sealing plate that can guide the second shutter to slide obliquely in the medium channel and a sealing ring that can flexibly abut against the second shutter. The guide sealing plate is obliquely arranged at the bottom of the medium channel. The sealing ring is obliquely arranged in the medium channel and close to the right side of the valve body.

2. The sliding gate knife valve of claim 1, wherein, The valve body is also provided with a scraping strip that can scrape the sealing surface of the second shutter. The scraping strip is horizontally arranged in the right side of the chute and close to the medium channel. The included angle between the sealing ring and the second shutter is an acute angle.

3. The sliding gate knife valve of claim 2, wherein, The sealing module further includes a first hinge part and a second hinge part. The first hinge part and the second hinge part are respectively arranged at the lower end of the first shutter and the upper end of the second shutter.

4. The push-together knife gate valve of claim 2, wherein, The first shutter and the second shutter are hinged through the first hinge part and the second hinge part.

5. The push-together knife gate valve of claim 1, wherein, The lower end edge of the second shutter is also provided with an arc-shaped wedge opening that can be matched with the guide sealing plate. The control module further includes a mounting bracket and a driving unit that can drive the drive screw to slide longitudinally.

6. The push-together knife gate valve of claim 2, wherein, The driving unit is vertically arranged on the top of the valve body through the mounting bracket and is in transmission connection with the drive screw.

7. The push-together knife gate valve of claim 1, wherein, The valve body is also provided with a guide block that can limit and guide the second shutter. The guide block is arranged in the chute and away from the sealing ring.

8. The push-to-seat gate valve of claim 2, wherein, ​ ​

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