Combined plate type dual-seal slag separation valve

Abstract

The utility model discloses a combination plate type double seal slag separation valve, relates to the valve technical field, including valve body, install the upper valve cover and the bottom cover on the valve body upper side, the valve body is composed of a main body valve body, an upper side valve body and a lower side valve body integration, the main body valve body is internally provided with a valve seat, the valve seat is internally provided with a flashboard in a sliding mode, and the flashboard is provided with a gate. The gate plate is provided with an overflowing hole, the bottom cover and the lower side valve body are combined into a shell with an abutting plate cavity, a left abutting plate and a right abutting plate are symmetrically arranged in the abutting plate cavity, and the gate plate slides between the left abutting plate and the right abutting plate. Medium particles and residues in a pipeline cannot enter the inner cavity of the valve body through the overflowing hole to be deposited and accumulated, so that the flashboard is blocked, the flashboard can be freely opened and closed up and down to effectively work, the split valve body structure is adopted, later maintenance and cleaning are facilitated, meanwhile, double-layer sealing is arranged, and the service life of the valve is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely relates to a combined plate type double sealing residue isolation valve. BACKGROUND

[0002] The flat gate valve has the characteristics of light torque, compact structure, good sealing performance and low cost. For the pipeline of clean medium, the flat gate valve becomes the first choice of pipeline shut-off valve due to its excellent performance characteristics, and is widely used in long-distance pipeline of light oil, natural gas and other energy, but the newly exploited crude oil and heavy oil pipeline contains a lot of sand, particles and slag. The existing conventional flat gate valve cannot handle these media, such as Fig. 1-2 As shown in the figure, an open channel is formed between the flow hole of the gate plate and the valve seat during the opening and closing process of the gate plate moving up and down. Due to the fast flow rate of the medium, the medium quickly enters the inner cavity of the valve body from the open channel. The sand, particles and slag in the medium quickly accumulate and deposit at the bottom of the inner cavity of the valve body, and the higher the pile, the more difficult it is to close the gate plate. If the closing torque is too large, the valve stem will be bent and deformed, the sealing will be invalid, and the valve will be damaged. SUMMARY

[0003] The utility model aims at solving the technical problem of providing a combined plate type double sealing residue isolation valve, which solves the problem of medium deposition and accumulation causing the gate plate to be stuck.

[0004] TECHNICAL SCHEME

[0005] To solve the above problems, the utility model provides the technical scheme as follows:

[0006] A combined plate type double sealing residue isolation valve, comprising a valve body, an upper valve cover and a bottom cover installed on the upper side of the valve body, the valve body is composed of a main body, an upper side valve body and a lower side valve body, a valve seat is arranged in the main body, a gate plate is slidably arranged in the valve seat, a flow hole is arranged on the gate plate, the bottom cover and the lower side valve body are combined into a shell with a stop plate cavity, left and right stop plates are symmetrically arranged in the stop plate cavity, and the gate plate slides between the left and right stop plates.

[0007] Further, the two ends of the gate plate extend out of the valve seat.

[0008] Further, a cylindrical spiral spring is arranged between the left stop plate, the right stop plate and the lower side valve body.

[0009] Further, a sealing ring is arranged around the gate plate in the valve seat, and a hard sealing coating is arranged in the sealing ring of the valve seat.

[0010] Further, a scraping ring is arranged on the lower side of the left stop plate and the right stop plate.

[0011] Further, the upper side of the gate plate is connected with the valve rod.

[0012] Further, the upper side valve body is provided with a clamping block matched with the valve seat, the clamping block clamps the valve rod, and an O-ring is arranged between the clamping block and the valve seat.

[0013] Further, the upper side of the valve rod is provided with a valve rod piece, and the valve rod slides in the valve rod piece.

[0014] Further, the upper side of the valve rod piece is provided with a pneumatic actuator connected with the valve rod.

[0015] Further, the bottom cover is provided with a limiting block matched with the gate plate.

[0016] Beneficial effects

[0017] Compared with the prior art, the technical scheme provided by the utility model has the beneficial effects that:

[0018] The utility model discloses a technical scheme that sets up left and right abutting plates, when the gate plate moves, medium particles and slag in the pipeline cannot enter the valve body cavity through the flow hole and cause the gate plate to be stuck, the gate plate can be freely opened and closed to work effectively, the sealing performance of the valve is guaranteed, the left and right abutting plates are connected with cylindrical helical springs on the side, the left and right abutting plates cannot be stuck with the main gate plate, the split type valve body structure is adopted, the later maintenance and cleaning are convenient, double-layer sealing is set up, the service life of the valve is prolonged, the gate plate cooperates with the limiting block, the closing position of the gate plate can be accurately controlled, and the valve is prevented from being closed too much to affect the sealing. DRAWINGS

[0019] Fig. 1 It is a medium accumulation side view of a conventional flat gate valve in the background art;

[0020] Fig. 2 It is a medium accumulation front partial sectional view of a conventional flat gate valve in the background art;

[0021] Fig. 3 It is a side sectional view of embodiment 1 of the utility model;

[0022] Fig. 4 It is a front partial sectional view of embodiment 1 of the utility model;

[0023] Fig. 5 It is a side sectional view of the valve body of embodiment 1 of the utility model;

[0024] Fig. 6 It is a front partial sectional view of the valve body of embodiment 1 of the utility model;

[0025] Fig. 7 for Fig. 5 Enlarged view of point I in the middle;

[0026] Fig. 8 for Fig. 6 Enlarged schematic diagram at point II;

[0027] Fig. 9 This is a side sectional view of the gate during the movement process of Embodiment 1 of this utility model;

[0028] Fig. 10 This is a partial front cross-sectional view of the gate during the movement process of Embodiment 1 of this utility model. Detailed Implementation

[0029] To make the technical solution of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] Combined with appendix Fig. 3-10 A combined plate type double-seal slag-separating valve includes a valve body 1. The upper and lower ends of the valve body 1 are respectively connected to an upper valve cover 2 and a bottom cover 3. The valve body 1 is composed of a main valve body 101 located in the middle and an upper valve body 102 and a lower valve body 103 located on the upper and lower sides of the main valve body 101. The main valve body 101, the upper valve body 102 and the lower valve body 103 are an integral structure. The main valve body 101 is provided with a transverse flow channel 1011 that runs through the main valve body. The flow channel 1011 is used for the flow of the medium controlled by the valve body 1.

[0032] When the valve seat 7 is not installed, the main valve body 101 has an internal connection with the upper valve body 102 and the lower valve body 103, and has a connecting slot. The connecting slot of the main valve body 101 is located at the center of the upper valve body 102 and the lower valve body 103. The valve seat 7 is installed in the connecting slots on the upper and lower valve walls of the main valve body 101. The connecting slot of the main valve body 101 has a stepped structure. The inner diameter of the connecting slot near the flow channel 1011 is larger than the spacing of the outer connecting slots. This stepped slot structure can insert and fix the valve seat in the connecting slot, and make the valve seat 7 and the main valve body 101 stably cooperate.

[0033] The lower valve body 103 is fitted with the bottom cover 3. The bottom cover 3 is fixed to the lower valve body 103 by bolts. At this time, a complete shell with an internal cavity is formed between the bottom cover 3 and the lower valve body 103. The cavity in the complete shell formed by the lower valve body 103 and the bottom cover 3 is the abutment cavity 301.

[0034] The valve seat 7 is provided with a sliding gate 4 that moves up and down. Both ends of the gate 4 extend out of the valve seat, and the gate 4 is provided with a flow passage hole 401.

[0035] The left abutting plate 5 and the right abutting plate 6 are symmetrically arranged in the abutting plate cavity 301, and a space is arranged between the left abutting plate 5 and the right abutting plate 6, which corresponds to the width of the gate plate 4. The gate plate 4 slides between the left abutting plate 5 and the right abutting plate 6 and in the valve seat 7, and switches between the blocking state and the flowing state of the flow channel 1011 by sliding up and down.

[0036] The left abutting plate 5 and the right abutting plate 6 are both provided with spring grooves 151, and a cylindrical spiral spring 15 is arranged between the left abutting plate 5 and the right abutting plate 6 and the inner wall of the lower valve body 103. One end of the cylindrical spiral spring 15 is clamped into the spring groove 151 of the left abutting plate 5 and the right abutting plate 6, which is used to limit the position of the cylindrical spiral spring 15 and prevent it from deviating, so as to ensure that the spring force direction is perpendicular to the left abutting plate 5 and the right abutting plate 6. By using the cylindrical spiral spring 15 to pre-tighten the back of the left abutting plate 5 and the right abutting plate 6, it is ensured that the left abutting plate 5 and the right abutting plate 6 can be attached to the gate plate 4, so as to isolate the particles and slag medium. The extension and retraction adjustment space of the cylindrical spiral spring 15 ensures that the left abutting plate 5 and the right abutting plate 6 will not be locked.

[0037] Through the cooperation between the gate plate 4 and the left abutting plate 5 and the right abutting plate 6, and the overflow hole 401 arranged on the gate plate 4, when the gate plate 4 needs to keep the flow channel 1011 of the valve body 1 in the flowing state, the overflow hole 401 is opposite to the flow channel 1011, and the medium in the valve body 1 can smoothly pass through the flow channel 1011 and the overflow hole 401. At this time, the valve body 1 is in the flowing state.

[0038] When the valve body 1 needs to block the flow of the internal medium, the gate plate 4 is slid downward, and the gate plate 4 slides between the left abutting plate 5 and the right abutting plate 6. The gate plate 4 moves downward to the position where the overflow hole 401 is completely located between the left abutting plate 5 and the right abutting plate 6. At this time, the position of the gate plate 4 above the overflow hole 401 is located in the flow channel 1011. At this time, the gate plate 4 completely blocks the flow channel 1011, and the medium in the flow channel 1011 no longer flows.

[0039] During the process of the gate 4 moving downward, a part of the flow hole 401 of the gate 4 is located between the left abutting plate 5 and the right abutting plate 6, and another part is still in the flow channel 1011. At this time, since the flow channel 1011 still continuously flows with the medium, the medium will continue to flow through the flow hole 401 of the gate 4 which is still in the flow channel 1011. Part of the medium passes through the gate 4, and another part is accumulated in the flow hole 401 between the left abutting plate 5 and the right abutting plate 6. With the continuous downward movement of the gate 4, the flow hole 401 of the gate 4 is filled with the medium when it is completely between the left abutting plate 5 and the right abutting plate 6. At this time, the medium in the flow hole 401 of the gate 4 is fixed in the flow hole 401 by the plate wall of the gate 4 around the flow hole 401 and the left abutting plate 5 and the right abutting plate 6. When the flow channel 1011 needs to return to the flow state, the gate 4 rises, and the medium accumulated in the flow hole 401 of the gate 4 reenters the flow channel 1011 and flows away. When the valve body is arranged in a medium pipeline containing a large amount of sand, particles and slag, the combined plate type double sealing slag valve with left and right abutting plates is used. Due to the four-way isolation and cooperation of the combined plate (gate, left abutting plate and right abutting plate), the medium in the flow hole of the gate is sealed between the combined plate during the opening and closing process, and cannot enter the inner cavity of the valve body. The gate can be freely opened and closed for effective work, thereby ensuring the sealing performance of the valve.

[0040] The lower valve body 103 of the valve body 1 is fixed between the bottom cover 3 by screw cooperation, is stably fixed by screw 15 and nut cooperation, can be disassembled, and through the split type valve body (valve body and bottom cover combination) structure, when the valve is maintained after being used for many years, only the bottom cover part in the valve needs to be dismounted, the whole inner cavity of the valve and parts can be cleaned, decontaminated and maintained, thereby greatly reducing the engineering maintenance time and labor cost.

[0041] The contact surface between the lower valve body 103 and the bottom cover 3 is provided with a sealing gasket 13, which is used for sealing between the lower valve body 103 and the bottom cover 3, thereby playing a protection role on the internal parts of the abutting plate cavity 301.

[0042] The left abutting plate 5 and the right abutting plate 6 are provided with a scraping ring 12 at the lower side. When the flow hole 401 of the gate 4 is completely located between the left abutting plate 5 and the right abutting plate 6, the scraping ring 12 is located at the lower side of the flow hole 401, which can prevent the accumulated medium in the flow hole 401 from leaking out, and can also prevent the medium adhered to the surface of the gate 4 from leaking out. The scraping ring 12 can scrape the medium on the surface of the gate 4 and extrude it into the flow hole 401.

[0043] The valve seat 7 is provided with a sealing ring 8, and the sealing ring 8 is arranged around the gate 4, thereby realizing the sealing of the flow channel 1011 in the valve body 1 when the gate 4 moves up and down, preventing the medium in the flow channel 1011 from leaking out of the main valve body 1 when the gate 4 moves up and down. The sealing ring 8 is preferably made of plastic.

[0044] The valve seat 7 is provided with a hard sealing coating 10 inside the sealing ring 8, and the sealing ring 8 will be continuously worn out by long-term use of the gate plate 4. When the sealing ring 8 is worn out, the hard sealing coating 10 takes over the work of the sealing ring 8 to realize sealing work. The valve seat 7 has a double sealing function, and is provided with a sealing ring as a first sealing, and a hard sealing coating as a second sealing. When the sealing ring (plastic) first sealing is worn out, the hard sealing coating second sealing immediately adheres to replace the sealing, which greatly improves the service life of the valve.

[0045] The upper valve body 102 is provided with a valve rod member fixed by bolts, and the valve rod member is provided with a valve rod 16 slidingly arranged therein. The valve rod 16 is fixedly connected with the gate plate, and the upper valve body 102 is provided with a clamping block between the upper connecting slot and the clamping block. The clamping block is used for clamping the gate plate 4 to keep it vertical. The clamping block is arranged in cooperation with the valve seat 7 arranged in the connecting slot, and an O-shaped ring 9 is arranged between the clamping block and the valve seat 7. The O-shaped ring is used for clamping the relative position between the clamping block and the valve seat 7.

[0046] The upper side of the valve rod member is provided with a pneumatic actuator 17 fixed by bolts. The pneumatic actuator 17 is connected with the valve rod 16. The user drives the gate plate 4 to slide up and down by controlling the pneumatic actuator 17. The pneumatic actuator 17 drives the valve rod 16 to further drive the gate plate 4 to move.

[0047] The left stop plate 5 and the right stop plate 6 are provided with limiting blocks 18 fixed at the bottom side. The limiting blocks 18 are preferably fixed in the inner part of the bottom cover 3 by screws 19. The limiting blocks 18 are arranged in correspondence with the shape of the bottom side of the gate plate 4. The limiting blocks 18 can accurately control the closing position of the gate plate to prevent the valve from being closed too much to affect the sealing.

[0048] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A combined plate type double-seal slag-separating valve, characterized in that, The device includes a valve body, and an upper valve cover and a bottom cover installed on the upper side of the valve body. The valve body is integrally composed of a main valve body, an upper valve body, and a lower valve body. A valve seat is provided inside the main valve body, and a gate plate is slidably provided inside the valve seat. The gate plate is provided with a flow hole. The bottom cover and the lower valve body are combined to form a shell with a backing plate cavity. A left backing plate and a right backing plate are symmetrically provided inside the backing plate cavity, and the gate plate slides between the left backing plate and the right backing plate.

2. The combined plate type double-seal slag-blocking valve according to claim 1, characterized in that, The gate extends from both ends of the valve seat.

3. The combined plate type double-seal slag-blocking valve according to claim 1, characterized in that, A cylindrical helical spring is provided between the left abutment plate, the right abutment plate, and the lower valve body.

4. The combined plate type double-seal slag-blocking valve according to claim 1, characterized in that, The valve seat is provided with a sealing ring surrounding the gate, and the valve seat is provided with a hard sealing coating inside the sealing ring.

5. A combined plate type double-seal slag-blocking valve according to claim 1, characterized in that, The left and right abutments are provided with scraping rings on their lower sides.

6. The combined plate type double-seal slag-blocking valve according to claim 1, characterized in that, A valve stem is connected to the upper side of the gate.

7. A combined plate type double-seal slag-blocking valve according to claim 6, characterized in that, The upper valve body is provided with a clamping block that cooperates with the valve seat. The clamping block clamps the valve stem, and an O-ring is provided between the clamping block and the valve seat.

8. A combined plate type double-seal slag-blocking valve according to claim 1, characterized in that, The upper valve body is provided with a valve stem, and the valve stem slides within the valve stem.

9. A combined plate type double-seal slag-blocking valve according to claim 8, characterized in that, A pneumatic actuator is provided on the upper side of the valve stem, and the pneumatic actuator is connected to the valve stem.

10. A combined plate type double-seal slag-blocking valve according to claim 1, characterized in that, The bottom cover is provided with a limiting block, which is correspondingly arranged with the gate.

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