Rubber lining three-way reversing valve with high sealing performance

Abstract

The utility model discloses a rubber lining three-way reversing valve with high sealing performance, which belongs to the technical field of three-way reversing valves and comprises an upper valve casing, a lower valve casing and a sealing ball, the upper valve casing is fixedly connected with the lower valve casing, an outlet communicated with the inside is arranged at the top end of the upper valve casing, and the sealing ball is arranged at the bottom end of the upper valve casing. A first inlet and a second inlet are formed in the bottom end of the lower valve shell, a set of upper transverse frame and a set of lower transverse frame are installed in the lower valve shell, a guiding function is formed through limitation of the upper transverse frame and the lower transverse frame, so that a sealing ball only moves along a fixed route when the sealing ball is switched between the first inlet and the second inlet, a buffer pad is installed at the stroke tail end of each sliding groove, and the buffering effect is good. When the sealing ball drives the limiting device to move to the tail end of the sliding groove, the limiting device is slowed down and buffered by the buffering pad, so that the sealing ball is prevented from rapidly hitting the sealing assembly to deform, the sealing performance can be still kept after channels are switched for a long time and multiple times, and ore pulp is prevented from flowing back.

Description

Technical Field

[0001] This utility model relates to the field of three-way reversing valve technology, and more specifically, to a high-sealing rubber-lined three-way reversing valve. Background Technology

[0002] A three-way directional valve, also known as a slurry reversing check valve, three-way valve, or Taylor valve, is an automatic switching slurry conveying valve. Slurry pumps in slurry conveying systems often operate with one in operation and one on standby. Switching to the standby pump requires operating at least two valves, which can easily lead to blockages at the three-way joint, causing production stoppages and significant losses. Many mines use a dual-pump, dual-pipeline approach to solve this problem, but the pipeline investment is substantial. The three-way automatic directional valve completely solves this problem, costing only the price of a single valve, eliminating the need for a separate pipeline, and easily enabling automated control.

[0003] Chinese Patent Publication No. CN222458447U discloses a ceramic Taylor valve for an auxiliary check valve. This design uses the pressure generated by the water flow to drive the sealing ball away from the sealing valve seat. Since the valve inlet is connected to a pump, the pressure is unstable during pump operation, and the medium cannot maintain a stable pressure flow. When the medium pressure decreases, the return spring deforms and drives the double-plate sealing valve plate to quickly return to the seal, causing the double-plate sealing valve plate to flip and reset rapidly, thereby cutting off the backflow channel and effectively preventing fluid backflow. The check valve mechanism, in conjunction with the sealing ball, further assists in stopping the fluid flow, improving the flow-stopping effect of the device.

[0004] A three-way reversing valve achieves reversing sealing by blocking one of the inlets through the movement of an internal sealing ball. However, the movement of the sealing ball mainly relies on the inflow of slurry into one inlet, which forces it towards the other inlet for sealing. If the slurry flow rate is too fast during this process, the strong impact force can cause the sealing ball to be quickly smashed into the other inlet. After multiple switching, the sealing ball and the sealing connection can be deformed by the impact force, affecting the sealing effect.

[0005] Therefore, a high-sealing rubber-lined three-way directional valve is proposed to address the above problems. Utility Model Content

[0006] 1. Technical problems to be solved

[0007] This utility model provides a high-sealing rubber-lined three-way reversing valve, which can improve the problems existing in related technologies: if the flow rate of slurry is too fast, the sealing ball is easily smashed into another inlet by strong impact force. After multiple switching, the sealing ball and the sealing connection are easily deformed by the impact force, affecting the sealing effect.

[0008] 2. Technical Solution

[0009] To solve the above problems, the present invention adopts the following technical solution.

[0010] This application provides a high-sealing rubber-lined three-way reversing valve, including an upper valve housing, a lower valve housing, and a sealing ball. The upper and lower valve housings are fixedly connected. The top of the upper valve housing is provided with an outlet communicating with the interior. The bottom of the lower valve housing is provided with an inlet one and an inlet two, respectively. The interiors of both the upper and lower valve housings are coated with wear-resistant rubber. A buffer assembly is provided inside the lower valve housing. Sealing assemblies are provided at the communication points between the interior of the lower valve housing and the inlets one and two. The sealing assemblies are adapted to the sealing ball. The buffer assembly includes two parallel upper crossbeams and two limiting devices. Two sliding grooves are opened at the outer ends of the upper crossbeams. Buffer pads for buffering the limiting devices are installed inside the sliding grooves.

[0011] The technical solutions described in this application embodiment have at least the following technical effects:

[0012] Inside the lower valve housing, there is a set of upper and lower crossbeams. The upper and lower crossbeams restrict and guide the movement, ensuring that the sealing ball moves only along a fixed path when switching between inlet one and inlet two. A buffer pad is installed at the end of the stroke of each chute. When the sealing ball moves with the limiting device to the end of the chute, it is slowed down and buffered by the buffer pad, thus preventing the sealing ball from quickly hitting the sealing component and deforming. This ensures that the sealing performance is maintained even after multiple switching of channels over a long period of time, preventing slurry backflow.

[0013] In some embodiments, a reinforcing frame is fixedly connected to the outer end of the upper valve housing, and the reinforcing frame is used to improve the impact resistance of the upper valve housing.

[0014] In some embodiments, the sealing assembly includes a sealing ring mounted on the inner wall of the lower valve housing, the sealing ring abutting against the outer end of the sealing ball to form a seal, and an annular groove being formed at the bottom of the sealing ring, with a magnet ring installed inside the annular groove.

[0015] In some embodiments, the sealing ball is made of metal and surrounded by vulcanized rubber. The magnetic ring attracts the sealing ball to the outer end of the sealing ring through magnetic attraction.

[0016] In some embodiments, the buffer assembly further includes two lower crossbeams, the two upper crossbeams are fixedly connected to each other, and both upper crossbeams are fixedly installed on the inner wall of the lower valve housing, and both lower crossbeams are fixedly installed on the inner wall of the lower valve housing. A slide rail for reducing the sliding resistance of the sealing ball is fixedly installed on the side of the lower crossbeams and the upper crossbeams that are close to each other.

[0017] In some embodiments, the limiting device includes a slide rod, a support plate is fixedly installed at the outer end of the slide rod, the support plate matches the sealing ball, a plurality of through holes are opened at the outer end of the support plate, and the two ends of the slide rod are slidably connected to the slide grooves on the two upper crossbars respectively.

[0018] In some embodiments, the buffer pad includes an outer pad, which is fixedly installed inside the slide groove. Two inner buffer flaps are fixedly installed inside the outer pad, with a gap between the two inner buffer flaps and a slowing gap between the two inner buffer flaps and the inner side of the outer pad. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the lower valve housing of this utility model;

[0022] Figure 4 This is a schematic diagram of the sealing component structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the buffer component structure of this utility model;

[0024] Figure 6 This is a schematic diagram of the limiting device structure of this utility model;

[0025] Figure 7 This is a schematic diagram of the buffer pad structure of this utility model.

[0026] Explanation of the labels in the diagram:

[0027] 1. Upper valve body;

[0028] 2. Lower valve body;

[0029] 3. Entrance 1;

[0030] 4. Entrance 2;

[0031] 5. Exports;

[0032] 6. Reinforcing frame;

[0033] 7. Buffer assembly; 71. Upper crossbeam; 72. Lower crossbeam; 73. Slide rail; 74. Slide groove; 75. Buffer pad; 751. Outer pad; 752. Inner buffer flap; 753. Deceleration gap; 76. Limiting device; 761. Slide rod; 762. Support plate; 763. Through hole;

[0034] 8. Sealed ball;

[0035] 9. Sealing assembly; 91. Sealing ring; 92. Annular groove; 93. Magnet ring. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0037] Please see Figures 1-7 A high-sealing rubber-lined three-way reversing valve includes an upper valve housing 1, a lower valve housing 2, and a sealing ball 8. The upper valve housing 1 and the lower valve housing 2 are fixedly connected. The top of the upper valve housing 1 is provided with an outlet 5 that communicates with the interior. The bottom of the lower valve housing 2 is provided with an inlet 3 and an inlet 4, respectively. The interior of both the upper valve housing 1 and the lower valve housing 2 is coated with wear-resistant rubber. A buffer assembly 7 is provided inside the lower valve housing 2. Sealing assemblies 9 are provided at the communication points between the interior of the lower valve housing 2 and the inlet 3 and the inlet 4. The sealing assembly 9 is adapted to the sealing ball 8. The buffer assembly 7 includes two parallel upper crossbars 71 and two limiting devices 76. Two sliding grooves 74 are opened at the outer ends of the upper crossbars 71. A buffer pad 75 for buffering the limiting devices 76 is installed inside the sliding grooves 74.

[0038] A reinforcing frame 6 is fixedly connected to the outer end of the upper valve body 1. The reinforcing frame 6 is used to improve the impact resistance of the upper valve body 1.

[0039] The three-way directional valve in this design is mainly used for slurry transportation. The upper valve housing 1 and lower valve housing 2 are primarily connected by bolts, and their interiors are interconnected. An outlet 5 is located at the top of the upper valve housing 1, while inlets 1 (3) and 2 (4) are located on either side of the bottom of the lower valve housing 2. Flanges are installed on outlet 5, inlet 3, and inlet 4 for connection to the pipeline transportation system. A sealing ball 8 is installed inside the lower valve housing 2. When slurry from the pipe connected to inlet 3 flows into the lower valve housing 2, it pushes the sealing ball 8 towards inlet 4. The pressure inside the lower valve housing 2 will press the sealing ball 8 against the sealing component 9 at the connection between the second inlet 4 and the lower valve housing 2, thereby cutting off the connection between the second inlet 4 and the interior of the lower valve housing 2. This allows the pipe on the first inlet 3 side to connect with the interior of the lower valve housing 2. When the pipe connected to the first inlet 3 stops, and mud flows into the lower valve housing 2 through the pipe connected to the second inlet 4, the sealing ball 8 will automatically move to block the connection port of the first inlet 3, thus enabling automatic switching. At the same time, since the slurry often impacts one side, causing poor sealing, the sealing ball 8 will not repeatedly wear down the same position, thereby improving its service life.

[0040] The interior of both the upper valve body 1 and the lower valve body 2 is coated with wear-resistant rubber, or it can be lined with ceramic. Since the mud contains a large amount of sand and gravel impurities, coating the interior of the upper valve body 1 and the lower valve body 2 with wear-resistant rubber can reduce the wear inside the upper valve body 1 and the lower valve body 2, thereby improving their service life.

[0041] The sealing ball 8 has a metal skeleton in the middle. The outer surface of the sealing ball 8 is coated with a layer of rubber by vulcanization through a mold to improve wear resistance. A reinforcing frame 6 is fixed at the outer end of the upper valve body 1. When the mud flows from the lower valve body 2 into the upper valve body 1, the mud will first impact the inner wall of the upper valve body 1. By reinforcing the upper valve body 1 with the reinforcing frame 6, the overall impact resistance of the upper valve body 1 can be improved.

[0042] Inside the lower valve housing 2, there is a set of upper crossbeams 71 and lower crossbeams 72. The upper crossbeams 71 and lower crossbeams 72 restrict and guide the movement, so that when the sealing ball 8 switches between inlet 1 3 and inlet 2 4, it will only move along a fixed route. At the end of the stroke of each slide 74, a buffer pad 75 is installed. When the sealing ball 8 moves with the limiting device 76 to the end of the slide 74, it will be slowed down and buffered by the buffer pad 75, thereby preventing the sealing ball 8 from quickly hitting the sealing assembly 9 and deforming it. It can maintain the sealing performance after switching channels for a long time and many times, and prevent the slurry backflow.

[0043] Please see Figure 3 and Figure 4 The sealing assembly 9 includes a sealing ring 91, which is installed on the inner wall of the lower valve housing 2. The sealing ring 91 abuts against the outer end of the sealing ball 8 to form a seal. An annular groove 92 is provided at the bottom of the sealing ring 91, and a magnet ring 93 is installed inside the annular groove 92.

[0044] The sealing ball 8 is made of metal inside and is surrounded by vulcanized rubber. The magnetic ring 93 attracts the sealing ball 8 magnetically, causing the sealing ball 8 to press against the outer end of the sealing ring 91.

[0045] In this design, the sealing assembly 9 is installed at the connection points between inlet 3 and inlet 4 and the lower valve housing 2, and is also located on the inner wall of the lower valve housing 2. The sealing assembly 9 is mainly composed of a sealing ring 91 and a magnetic ring 93. The sealing ring 91 can be snapped onto the inner side of the interface by friction. The sealing ring 91 is made of rubber, and an annular groove 92 is opened at the bottom of the sealing ring 91. The magnetic ring 93 is installed inside the annular groove 92. Through the magnetic attraction between the magnetic ring 93 and the internal metal structure of the sealing ball 8, when the sealing ball 8 abuts against the sealing ring 91, the magnetic ring 93 attracts the sealing ball 8 through the rubber layer on the sealing ring 91 and the sealing ball 8, so that the sealing ball 8 can quickly abut against the outer end of the sealing ring 91. At the same time, it can also make the sealing ball 8 and the sealing ring 91 fit more tightly, reduce the gap between the sealing ball 8 and the sealing ring 91, and improve the sealing performance.

[0046] Please see Figure 2 and Figure 5 The buffer assembly 7 also includes two lower crossbeams 72 and two upper crossbeams 71 fixedly connected to each other. Both upper crossbeams 71 are fixedly installed on the inner wall of the lower valve housing 2, and both lower crossbeams 72 are fixedly installed on the inner wall of the lower valve housing 2. A slide rail 73 for reducing the sliding resistance of the sealing ball 8 is fixedly installed on the side of the lower crossbeams 72 and the upper crossbeams 71 that are close to each other.

[0047] In this design, the two upper horizontal frames 71 are arranged in parallel, and the two lower horizontal frames 72 are shorter than the upper horizontal frames 71 and are also arranged in parallel. The upper horizontal frames 71 and the lower horizontal frames 72 are also coaxially arranged. The two upper horizontal frames 71 and the two lower horizontal frames 72 can form a rectangular frame structure, which confines the sealing ball 8 within the frame. Slide rails 73 are fixed at the top of the two lower horizontal frames 72 and the bottom of the two upper horizontal frames 71. When the sealing ball 8 abuts against the slide rails 73, the friction of the sealing ball 8 sliding within the frame can be reduced, making it slide more smoothly. At the same time, the frame formed by the upper horizontal frames 71 and the lower horizontal frames 72 also plays a guiding role, so that the sealing ball 8 can only move within the restricted path and cannot contact the inner wall of the upper valve body 1 to generate impact.

[0048] Please see Figure 6 The limiting device 76 includes a slide rod 761, and a support plate 762 is fixedly installed on the outer end of the slide rod 761. The support plate 762 matches the sealing ball 8. Multiple through holes 763 are opened on the outer end of the support plate 762. The two ends of the slide rod 761 are slidably connected to the slide grooves 74 on the two upper crossbars 71 respectively.

[0049] The limiting device 76 in this design is mainly used to limit and block the sealing ball 8. Slide grooves 74 are provided at both ends of the upper crossbeam 71. The limiting device 76 mainly consists of a slide rod 761 and a support plate 762. The support plate 762 is fixed to the outer end of the slide rod 761. Both ends of the slide rod 761 are slidably connected to the slide grooves 74 on both sides. The support plate 762 is arc-shaped and can fit perfectly against the outer surface of the sealing ball 8. When the sealing ball 8 moves within the frame formed by the upper crossbeam 71 and the lower crossbeam 72, whenever the sealing ball 8 is about to abut and seal with the connection port of inlet 1 3 or inlet 2 4, the sealing ball 8... The sealing ball 8 will first come into contact with the support plate 762. At this time, the sealing ball 8 will push the slide rod 761 to slide along the slide groove 74. When the slide rod 761 slides to the end of the slide groove 74, the sealing ball 8 can slowly adhere to the sealing assembly 9 through the buffer pad 75. This not only reduces the impact force, but also prevents the sealing ball 8 from contacting the side wall of the lower valve housing 2 through the blocking of the limiting device 76, preventing the sealing ball 8 from impacting the inner wall of the lower valve housing 2 and deforming it. This can improve the protection of the sealing ball 8. The through hole 763 opened at the outer end of the support plate 762 can reduce the weight.

[0050] Please see Figure 7 The buffer pad 75 includes an outer pad 751, which is fixedly installed inside the slide groove 74. Two inner buffer petals 752 are fixedly installed inside the outer pad 751. A gap is provided between the two inner buffer petals 752, and a slowing gap 753 is provided between the two inner buffer petals 752 and the inner side of the outer pad 751.

[0051] In this design, the buffer pad 75 is installed within the slide groove 74. The slide groove 74 has a notch that matches the buffer pad 75. After the buffer pad 75 is installed within the notch, it levels the inner wall of the slide groove 74. The buffer pad 75 mainly consists of an outer pad 751 and two inner buffer flaps 752. The two inner buffer flaps 752 are fixedly installed inside the outer pad 751 and are both made of rubber. The inner buffer flaps 752 are slightly curved, and there is a gap between the two inner buffer flaps 752. Simultaneously, the inner buffer flaps 752 and... The gap between the inner sides of the outer pad 751 forms a deceleration gap 753. When the slide rod 761 moves to the inner side of the outer pad 751, it is blocked by the inner buffer flap 752. Then, the inner buffer flap 752 deforms and extends into the deceleration gap 753. At this time, the blocking effect of the inner buffer flap 752 can form a buffer. When the inner buffer flap 752 abuts against the inner side of the outer pad 751, the rubber deformation can further buffer the slide rod 761 and stop its movement, thereby decelerating and buffering the sealing ball 8. It is worth mentioning that the internal width of the outer pad 751 matches the slide rod 761, and the inner buffer flap 752 has a thickness. Therefore, the slide rod 761 cannot cross the inner buffer flap 752, so the slide rod 761 will not be stuck by the inner buffer flap 752.

[0052] Working principle: The two upper crossbars 71 and the two lower crossbars 72 form a rectangular frame structure that traps the sealing ball 8 inside. When the sealing ball 8 abuts against the slide rail 73, the friction of the sealing ball 8 sliding within the frame is reduced. When the sealing ball 8 moves within the frame to switch seals, the sealing ball 8 first abuts against the support plate 762 and pushes the slide rod 761 to slide along the slide groove 74. When the slide rod 761 slides to the end of the slide groove 74, it is buffered by the buffer pad 75. When the slide rod 761 moves to the inside of the outer pad 751, the inner buffer petal 752 deforms and extends into the slow gap 753 to form a buffer. When the inner buffer petal 752 abuts against the inside of the outer pad 751, the rubber deformation further buffers the slide rod 761, allowing the sealing ball 8 to slowly adhere to the sealing assembly 9, thereby buffering and reducing the impact force.

Claims

1. A high-sealing rubber-lined three-way directional valve, comprising an upper valve housing (1), a lower valve housing (2), and a sealing ball (8), wherein the upper valve housing (1) and the lower valve housing (2) are fixedly connected, the upper valve housing (1) has an outlet (5) communicating with the interior at its top end, and the lower valve housing (2) has an inlet one (3) and an inlet two (4) respectively at its bottom end, wherein the interior of both the upper valve housing (1) and the lower valve housing (2) is coated with wear-resistant rubber. characterized in that The lower valve housing (2) is provided with a buffer assembly (7), and the lower valve housing (2) is provided with a sealing assembly (9) at the connection between the lower valve housing (2) and the inlet one (3) and the inlet two (4), and the sealing assembly (9) is adapted to the sealing ball (8); The buffer assembly (7) includes two parallel upper crossbeams (71) and two limiting devices (76). Two sliding grooves (74) are opened at the outer ends of the upper crossbeams (71), and a buffer pad (75) for buffering the limiting device (76) is installed inside the sliding groove (74).

2. The high containment rubber lined tee-trap valve according to claim 1, wherein: A reinforcing frame (6) is fixedly connected to the outer end of the upper valve housing (1), and the reinforcing frame (6) is used to improve the impact resistance of the upper valve housing (1).

3. The high containment rubber lined tee-trap valve according to claim 1, wherein: The sealing assembly (9) includes a sealing ring (91), which is installed on the inner wall of the lower valve housing (2). The sealing ring (91) abuts against the outer end of the sealing ball (8) to form a seal. An annular groove (92) is provided at the bottom of the sealing ring (91), and a magnet ring (93) is installed inside the annular groove (92).

4. The high containment rubber lined tee-trap valve according to claim 3, wherein: The sealing ball (8) is made of metal inside and is surrounded by vulcanized rubber. The magnet ring (93) attracts the sealing ball (8) magnetically, causing the sealing ball (8) to abut against the outer end of the sealing ring (91).

5. The high containment rubber lined tee-trap valve according to claim 1, wherein: The buffer assembly (7) also includes two lower crossbars (72), two upper crossbars (71) are fixedly connected to each other, and both upper crossbars (71) are fixedly installed on the inner wall of the lower valve housing (2). Both lower crossbars (72) are fixedly installed on the inner wall of the lower valve housing (2). A slide rail (73) for reducing the sliding resistance of the sealing ball (8) is fixedly installed on the side of the lower crossbars (72) and the upper crossbars (71) that are close to each other.

6. The high containment rubber lined tee-trap valve according to claim 5, wherein: The limiting device (76) includes a slide rod (761), and a support plate (762) is fixedly installed on the outer end of the slide rod (761). The support plate (762) matches the sealing ball (8). The outer end of the support plate (762) is provided with multiple through holes (763). The two ends of the slide rod (761) are slidably connected to the sliding grooves (74) on the two upper crossbars (71).

7. A high-sealing rubber-lined three-way directional valve according to claim 6, characterized in that: The buffer pad (75) includes an outer pad (751), which is fixedly installed inside the slide groove (74). Two inner buffer petals (752) are fixedly installed inside the outer pad (751). A gap is provided between the two inner buffer petals (752), and a slowing gap (753) is provided between the two inner buffer petals (752) and the inner side of the outer pad (751).

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