Straight-through throttling hole double-isolation valve

Abstract

The invention relates to the technical field of valves, and discloses a straight-through throttling hole double-isolation valve which comprises a flowing pipeline and a plugging valve body, the plugging valve body comprises a first valve body and a second valve body, the plugging valve body is provided with a through hole communicating with the flowing pipeline, a plugging strip is slidably connected into the through hole, and an operation strip is in threaded connection with the interior of the through hole; the operation strip is provided with an operation ring, the plugging strip is provided with an operation block, and the operation ring is provided with an annular groove for the operation block to be inserted in. When fluid drives the plugging strip to rotate, the operation block is located in the annular groove, so that the plugging block is difficult to drive the operation ring to rotate, the operation ring is not easily influenced by movement of the plugging strip, and the plugging strip and the operation strip are assembled. The plugging strip can stably plug the flowing pipeline, and the plugging strip is prevented from being jacked up due to the action of fluid pressure.

Description

Technical Field

[0001] This application relates to the technical field of valves, and particularly to a direct-through throttle orifice double isolation valve. Background Art

[0002] An isolation valve is a type of valve. A valve is a structure used to control the flow of fluid in a pipeline. A double isolation valve is a structure with two valves, used to further restrict the flow of fluid in the pipeline.

[0003] In the related art, the isolation valve includes a flow pipeline and two valve bodies. A sealing strip is slidably connected inside the two valve bodies. The sealing strip slides in the vertical direction. When the sealing strip is inserted into the flow pipeline, the sealing strip seals the flow pipeline.

[0004] Since the sealing strip slides in the vertical direction, if the pressure on the fluid side is relatively large, the fluid may push the sealing strip up, resulting in the sealing strip not being able to completely seal the flow pipeline, affecting the use of the double isolation valve. Summary of the Invention

[0005] In order to improve the problem that the sealing strip may be pushed up, this application provides a direct-through throttle orifice double isolation valve.

[0006] The direct-through throttle orifice double isolation valve provided by this application adopts the following technical solutions: The direct-through throttle orifice double isolation valve includes a flow pipeline and a sealing valve body. The sealing valve body includes a first valve body and a second valve body. The sealing valve body is provided with a through hole communicating with the flow pipeline. A sealing strip is slidably connected inside the through hole. An operating strip is threadedly connected inside the through hole. An operating ring is provided on the operating strip. An operating block is provided on the sealing strip. A ring groove for the operating block to insert is provided on the operating ring; when the operating block is located in the ring groove, the assembly of the sealing strip and the operating strip is realized.

[0007] By adopting the above technical solution, when the operating strip rotates, since the operating strip is threadedly connected inside the through hole, the operating strip can slide along the length direction of the first valve body, enabling the operating strip to drive the sealing strip to move, realizing the sealing of the flow pipeline by the sealing strip; when the fluid drives the sealing strip to rotate, by making the operating block located in the ring groove, it is difficult for the sealing block to drive the operating ring to rotate, making the operating ring not easily affected by the movement of the sealing strip, enabling the sealing strip to stably seal the flow pipeline, and avoiding the sealing strip from being pushed up due to the action of fluid pressure.

[0008] Optionally, an operating hole is provided on the operating ring for the operating block to pass through.

[0009] By adopting the above technical solution, the operating block is inserted into the operating ring through the operating hole, enabling the operating block and the operating ring to be separated, and the disassembly between the sealing strip and the operating strip can be achieved. If the sealing strip is corroded due to long-term sealing of the fluid, the sealing strip can be replaced, extending the service life of the double isolation valve.

[0010] Optionally, an isolation valve seat is provided on the flow pipeline. The isolation valve seat is provided with a through hole for the fluid to pass through, and a second accommodation groove communicating with the through hole is provided on the isolation valve seat. A first accommodation groove for installing the isolation valve seat is provided on the flow pipeline; when the isolation valve seat is arranged in the first accommodation groove, the second accommodation groove can communicate with the perforation.

[0011] By adopting the above technical solution, by arranging the isolation valve seat on the flow pipeline, the first valve body can be installed in the second accommodation groove, reducing the friction generated between the first valve body and the flow pipeline, enabling the installation between the first valve body and the flow pipeline to be more stable, and reducing the processing difficulty of the first valve body and the flow pipeline.

[0012] Optionally, a first accommodation groove is provided on the flow pipeline, a second accommodation groove is provided on the isolation valve seat, and a receiving strip is provided on the isolation valve seat; when the receiving strip is inserted into the first accommodation groove and the second accommodation groove, the isolation valve seat is fixed to the flow pipeline.

[0013] By adopting the above technical solution, by inserting the receiving strip into the first accommodation groove and the second accommodation groove, the isolation valve seat can be stably fixed to the flow pipeline, preventing the isolation valve seat from rotating in the flow pipeline, and enabling the fluid to stably pass through the through hole and the perforation.

[0014] Optionally, a fixing strip is slidably connected to the first valve body, and a fixing groove for inserting the fixing strip is provided on the operating strip in the second valve body; when the fixing strip is inserted into the fixing groove, the fixing strips in the first valve body and the second valve body are fixed to each other, and the sealing strip seals the flow pipeline.

[0015] By adopting the above technical solution, the staff slides the fixing strip to disengage the fixing strip from the fixing groove, enabling the fixing strip to restrict the operating strip in the first valve body, fixing the fixing strips in the first valve body and the second valve body to each other, enabling the second valve body to stably restrict the flow of the fluid in the flow pipeline, preventing the situation that the sealing strip does not seal the flow pipeline due to external personnel accidentally touching the operating strip in the second valve body, and increasing the stability of the double isolation valve; at the same time, when the fixing strip is not inserted into the fixing groove, the staff can know that the sealing strip in the second valve body has not moved in place and needs to rotate the operating strip.

[0016] Optionally, the fixed groove communicates with the perforation. A first magnet is provided on the fixed strip, and a second magnet is provided on the operating strip. The second magnet adsorbs the first magnet. When the plugging strip is separated from the flow pipeline, the second magnet adsorbs the first magnet, and the fixed strip is separated from the fixed groove.

[0017] By adopting the above technical solution, when the operating strip rotates in the housing, the second magnet adsorbs the first magnet. At this time, the fixed strip slides in the fixed groove, so that the fixed strip is located in the fixed groove, thereby limiting the operating strip in the second valve body by the fixed strip, so that external personnel cannot rotate the operating strip in the second valve body, so as to realize the plugging of the flow pipeline by the plugging strip.

[0018] Optionally, a moving strip is slidably connected to the fixed strip. An operating rod is provided on the operating strip in the first valve body. The operating rod protrudes from the first valve body, and a moving hole for the moving strip to insert is provided on the operating rod. When the moving strip is inserted into the moving hole, the fixed strip is located in the fixed groove, and at this time the plugging strip plugs the flow pipeline.

[0019] By adopting the above technical solution, the staff slides the moving strip to insert the moving strip into the moving hole, so that the moving strip can limit the movement of the fixed strip in the first valve body. At this time, it is difficult for the staff to directly drive the fixed strip in the first valve body to rotate, so as to reduce the situation that the plugging strip in the first valve body does not completely plug the flow pipeline due to the twisting of external personnel, so that the plugging strip in the first valve body can stably plug the flow pipeline.

[0020] Optionally, a stop strip is slidably connected to the operating rod, and a stop hole for the stop strip to pass through is provided on the moving strip. When the stop strip is inserted into the stop hole, the moving strip is located in the moving hole.

[0021] By adopting the above technical solution, the staff slides the stop strip to insert the stop strip into the stop hole, realizing the mutual fixation of the moving strip and the stop strip, avoiding the situation that the moving strip is separated from the moving hole due to vibration or sliding, and further strengthening the limiting effect of the moving strip on the fixed strip in the first valve seat.

[0022] Optionally, a fixing plate is provided on the first valve body. The fixed strip is slidably connected to the fixing plate. A limiting strip is slidably connected to the fixing plate, and a limiting hole for the fixed strip to pass through is provided on the limiting strip. When the limiting hole is aligned with the fixed strip, the fixed strip can be separated from the fixed groove.

[0023] By adopting the above technical solution, the staff member slides the limit bar to align the limit hole in the limit bar with the fixed bar. The fixed bar can pass through the limit hole and disengage from the fixed groove, enabling the fixed bar to release the restriction on the operating bar in the second valve body, allowing the staff member to rotate the operating bar and achieve the unlocking of the blocking bar for the flowing pipeline. When the fixed bar is inserted into the fixed groove, the staff member can slide the moving bar to make the moving bar abut against the fixed bar, making it difficult for the fixed bar to slide on the fixed plate. At this time, the staff member cannot directly slide the moving bar to rotate the fixed bar in the second valve body, further strengthening the limiting effect of the fixed bar on the fixed bar in the second valve body.

[0024] Optionally, a limit inclined surface is provided on the limit bar. The distance between the limit inclined surface and the first valve body gradually decreases along the direction from the moving bar to the fixed bar. The limit inclined surface is located in the moving path of the moving bar when it disengages from the moving hole. When the moving bar disengages from the moving hole, the limit hole aligns with the fixed bar.

[0025] By adopting the above technical solution, since the distance between the limit inclined surface and the first valve body gradually decreases along the direction from the moving bar to the fixed bar, when the staff member slides the moving bar, the moving bar can drive the limit bar to move through the limit inclined surface, enabling the limit bar to release the restriction on the fixed bar in the second valve body. Thus, when the staff member achieves the release of the restriction of the limit bar on the fixed bar in the first valve body, the release of the restriction of the limit bar on the fixed bar in the second valve body can be completed.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the operating bar rotates, since the operating bar is threadedly connected in the through hole, the operating bar can slide along the length direction of the first valve body, enabling the operating bar to drive the blocking bar to move and achieve the blocking of the flowing pipeline by the blocking bar. When the fluid drives the blocking bar to rotate, by placing the operating block in the annular groove, it is difficult for the blocking block to drive the operating ring to rotate, making the operating ring not easily affected by the movement of the blocking bar, enabling the blocking bar to stably block the flowing pipeline and preventing the blocking bar from being lifted possibly due to the action of the fluid pressure.

[0027] 2. The staff member slides the limit bar to align the limit hole in the limit bar with the fixed bar. The fixed bar can pass through the limit hole and disengage from the fixed groove, enabling the fixed bar to release the restriction on the operating bar in the second valve body, allowing the staff member to rotate the operating bar and achieve the unlocking of the blocking bar for the flowing pipeline. When the fixed bar is inserted into the fixed groove, the staff member can slide the moving bar to make the moving bar abut against the fixed bar, making it difficult for the fixed bar to slide on the fixed plate. At this time, the staff member cannot directly slide the moving bar to rotate the fixed bar in the second valve body, further strengthening the limiting effect of the fixed bar on the fixed bar in the second valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1It is a schematic structural diagram of Embodiment 1; Figure 2 It is a cross-sectional view highlighting the plugging valve body in Embodiment 1; Figure 3 It is an exploded view highlighting the receiving strip in Embodiment 1; Figure 4 It is an exploded view highlighting the operating ring in Embodiment 1; Figure 5 It is a schematic structural diagram of Embodiment 2; Figure 6 It is along Figure 5 A partial cross-sectional view taken along line A-A in

[0029] Reference numerals: 1, flow pipeline; 11, flow hole; 12, first accommodation groove; 13, first receiving groove; 14, receiving strip; 2, plugging valve body; 21, first valve body; 22, second valve body; 23, perforation; 24, plugging strip; 241, operating block; 25, operating strip; 251, operating ring; 252, ring groove; 253, operating hole; 254, operating rod; 255, handle; 26, sliding hole; 261, fixing groove; 262, second magnet; 27, moving hole; 271, stopping strip; 272, stopping hole; 3, isolation valve seat; 31, through hole; 32, second accommodation groove; 33, second receiving groove; 4, fixing plate; 41, sliding groove; 42, fixing strip; 421, first magnet; 43, supporting strip; 431, moving strip; 44, vertical hole; 441, limiting strip; 442, limiting inclined surface; 443, limiting hole. Detailed implementation manners

[0030] The following further elaborates on this application in conjunction with the attached Figures 1-6 drawings.

[0031] Embodiment 1 This embodiment discloses a direct-through throttle hole double isolation valve. Refer to Figure 1 and Figure 2 , the direct-through throttle hole double isolation valve includes a flow pipeline 1 and a plugging valve body 2. The plugging valve body 2 includes a first valve body 21 and a second valve body 22. The first valve body 21 and the second valve body 22 are arranged in an array along the length direction of the flow pipeline 1. In other embodiments, there may also be multiple first valve bodies 21 or second valve bodies 22.

[0032] Refer to Figure 2 and Figure 3, a flow hole 11 for fluid passage is provided on the flow pipe 1. The flow hole 11 extends along the length direction of the flow pipe 1, that is, the flow hole 11 extends linearly. A first accommodation groove 12 for installing the first valve body 21 or the second valve body 22 is provided on the flow pipe 1. There are two first accommodation grooves 12, and the first accommodation groove 12 communicates with the flow hole 11. Two isolation valve seats 3 are provided on the flow pipe 1, and the isolation valve seats 3 can be installed in the first accommodation groove 12. The isolation valve seat 3 is frustum-shaped and is made of a flexible material.

[0033] Refer to Figure 2 and Figure 3 , a through hole 31 for fluid passage is provided on the outer surface of the isolation valve seat 3. A second accommodation groove 32 for installing the first valve body 21 or the second valve body 22 is provided on the end surface of the isolation valve seat 3, and the second accommodation groove 32 communicates with the through hole 31. A second receiving groove 33 is provided on the outer surface of the isolation valve seat 3, and a first receiving groove 13 communicating with the first accommodation groove 12 is provided on the flow pipe 1. When the isolation valve seat 3 is installed in the first accommodation groove 12, the first receiving groove 13 communicates with the second receiving groove 33. A receiving strip 14 is provided on the flow pipe 1, and the receiving strip 14 can be inserted into the first receiving groove 13 and the second receiving groove 33. At this time, the through hole 31 is aligned with the flow hole 11 to facilitate the flow of fluid.

[0034] Refer to Figure 2 and Figure 3 , through holes 23 are provided on both the first valve body 21 and the second valve body 22. When the first valve body 21 is installed on the isolation valve seat 3, the through hole 23 communicates with the first accommodation groove 12. A plug strip 24 is slidably connected in the through hole 23, and the plug strip 24 can block the first accommodation groove 12. At this time, it is difficult for fluid to pass through the through hole 31. A plurality of sealing rings are sleeved on the plug strip 24, and the sealing rings are used to limit the rotation of the plug strip 24 and limit the movement of the fluid in the through hole 23.

[0035] Refer to Figure 2 and Figure 4 , an operating strip 25 is threadedly connected in the through hole 23. An operating ring 251 is fixedly connected to the surface of the operating strip 25 facing the plug strip 24, and the operating ring 251 surrounds the operating strip 25 in the circumferential direction. A ring groove 252 is provided on the inner wall of the operating ring 251, and the ring groove 252 extends along the circumferential direction of the operating strip 25. An operating hole 253 communicating with the ring groove 252 is provided on the outer surface of the operating ring 251. An operating block 241 is fixedly connected to the plug strip 24, and the operating block 241 extends along the circumferential direction of the plug strip 24. The operating block 241 can enter the operating ring 251 from the operating hole 253, and the operating block 241 can be inserted into the ring groove 252.

[0036] Refer to Figure 2 and Figure 4, the staff first inserts the operation block 241 through the operation hole 253 into the operation ring 251 to connect the operation bar 25 and the plugging bar 24, and then installs the plugging bar 24 and the operation bar 25 in the first valve body 21 or the second valve body 22. When the plugging bar 24 rotates, the plugging bar 24 drives the operation bar 25 to move towards the flow pipeline 1, so as to block the flow hole 11 with the plugging bar 24 and block the flow pipeline 1.

[0037] Refer to Figure 2 and Figure 4 , a operating rod 254 is fixedly connected to the end surface of the operation bar 25 far from the plugging bar 24, and a handle 255 is threadedly connected to the operating rod 254. The handle 255 is used to drive the operating rod 254 to rotate. The operating rod 254 protrudes from the plugging valve body 2, and the staff can drive the operation bar 25 to rotate through the handle 255 to realize whether the plugging valve body 2 blocks the flow pipeline 1. The staff can adjust the position of the plugging bar 24 in the flow hole 11 to realize different flow rates of the fluid in the flow hole 11, that is, to realize the throttling function.

[0038] The implementation principle of Embodiment 1 is that the staff rotates the handle 255 to drive the operation bar 25 to drive the plugging bar 24 to move, so as to block the flow pipeline 1 with the plugging bar 24.

[0039] Embodiment 2 Refer to Figure 5 and Figure 6 , the difference between this embodiment and Embodiment 1 is that a fixing plate 4 is fixedly connected to the surface of the first valve body 21 close to the second valve body 22, and a sliding groove 41 is opened on the surface of the fixing plate 4 facing the second valve body 22, and a fixing bar 42 is slidably connected in the sliding groove 41.

[0040] Refer to Figure 5 and Figure 6 , a sliding hole 26 for the fixing bar 42 to pass through is opened on the surface of the second valve body 22, the sliding hole 26 communicates with the through hole 23 of the second valve body 22, and a fixing groove 261 for the fixing bar 42 to insert is opened on the outer surface of the operation bar 25. When the fixing bar 42 passes through the sliding hole 26 and inserts into the fixing groove 261, the fixing bar 42 limits the fixing bar 42 in the second valve body 22. At this time, the fixing bar 42 drives the plugging bar 24 to block the flow pipeline 1.

[0041] Refer to Figure 5 and Figure 6The second magnet 262 is fixedly connected to the groove wall of the fixed groove 261, and the first magnet 421 is fixedly connected to the end surface of the fixed strip 42 away from the bottom wall of the sliding groove 41, and the second magnet 262 attracts the first magnet 421. When the fixed strip 42 is inserted into the fixed groove 261, the second magnet 262 attracts the first magnet 421, so that the fixed strip 42 locks the operating strip 25, and the blocking strip 24 blocks the flow pipe 1.

[0042] Reference Figure 5 and Figure 6 A support bar 43 is fixedly connected to the surface of the fixed plate 4 away from the flow pipe 1, and a moving bar 431 is slidably connected to the support bar 43, and the moving bar 431 slides along the length direction of the flow pipe 1. A moving hole 27 is opened on the outer surface of the operating rod 254 in the first valve body 21, and the moving hole 27 is inserted into the moving hole 27. When the moving bar 431 is inserted into the moving hole 27, the blocking bar 24 blocks the flow pipe 1.

[0043] Reference Figure 6 The operating rod 254 is slidably connected with a stop bar 271, which slides in the vertical direction. A stop hole 272 is provided on the surface of the moving bar 431 for the stop bar 271 to pass through. When the stop bar 271 is inserted into the stop hole 272, the moving bar 431 can be located in the moving hole 27, so that the moving bar 431 limits the position of the operating rod 254 in the first valve body 21.

[0044] Reference Figure 6 The fixing plate 4 is provided with a vertical hole 44 connected to the sliding groove 41, and a limit bar 441 is slidably connected in the vertical hole 44, and the limit bar 441 slides in the vertical direction. A limit inclined surface 442 is provided on the end surface of the limit bar 441 away from the flow pipe 1, and the distance between the limit inclined surface 442 and the operating rod 254 gradually decreases in the vertical downward direction, and the limit inclined surface 442 is located on the moving path of the moving bar 431 to leave the moving hole 27.

[0045] Reference Figure 6 The surface of the limiting strip 441 is provided with a limiting hole 443 for the fixing strip 42 to pass through. When the limiting strip 441 falls, the limiting hole 443 is aligned with the sliding groove 41. At this time, the fixing strip 42 can move in the sliding groove 41 through the limiting hole 443, so that the fixing strip 42 is separated from the fixing groove 261. When one end of the fixing strip 42 abuts against the limiting strip 441, the limiting hole 443 is not aligned with the sliding groove 41. At this time, the fixing strip 42 is still fixed in the fixing groove 261, so that the limiting strip 441 locks the fixing strip 42, and prevents an outsider from accidentally touching the handle 255 in the second valve body 22 and driving the fixing strip 42 to rotate.

[0046] Reference Figure 6When the moving bar 431 disengages from the moving hole 27, the moving bar 431 drives the limiting bar 441 to move through the limiting inclined surface 442, aligning the limiting hole 443 with the sliding groove 41, so as to facilitate the separation of the fixing bar 42 from the fixing groove 261.

[0047] The implementation principle of Embodiment 2 is as follows: The staff first slides the stop bar 271 to disengage the stop bar 271 from the stop hole 272, and then slides the moving bar 431 to drive the limiting bar 441 to move through the limiting inclined surface 442. At this time, the staff can rotate the handle 255 in the first valve body 21 to unlock the first valve body 21 for the flow pipeline 1; the staff then slides the fixing bar 42 to disengage the fixing bar 42 from the fixing groove 261, and the staff can rotate the handle 255 in the second valve body 22 to unlock the second valve body 22 for the flow pipeline 1.

[0048] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the field to which this application belongs. The terms "first", "second", "third" and similar words used in the specification and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "a" or "an" do not denote a quantity limitation either, but mean that there is at least one. Words such as "comprising" or "including" mean that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Upper", "lower", "left", "right", etc. are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0049] The above are only the preferred embodiments of this application and are not used to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the design concept of this application shall be included within the protection scope of this application.

Claims

1. A straight-through throttle orifice double isolation valve, comprising a flow pipeline (1) and a plugging valve body (2), wherein the plugging valve body (2) comprises a first valve body (21) and a second valve body (22), wherein the plugging valve body (2) is provided with a through hole (23) communicating with the flow pipeline (1), wherein a plugging strip (24) is slidably connected in the through hole (23), and wherein: The through hole (23) is internally threadedly connected with an operating strip (25), an operating ring (251) is provided on the operating strip (25), an operating block (241) is provided on the blocking strip (24), and an annular groove (252) is provided on the operating ring (251) for the operating block (241) to be inserted; when the operating block (241) is located in the annular groove (252), the blocking strip (24) and the operating strip (25) are assembled.

2. The straight-through throttle orifice double isolation valve according to claim 1 is characterized in that: The operating ring (251) is provided with an operating hole (253), and the operating hole (253) is used for the operating block (241) to pass through.

3. The straight-through throttle orifice double isolation valve according to claim 1 is characterized in that: The flow conduit (1) is provided with an isolation valve seat (3), the isolation valve seat (3) is provided with a through hole (31) for fluid to pass through, the isolation valve seat (3) is provided with a second receiving groove (32) connected to the through hole (31), and the flow conduit (1) is provided with a first receiving groove (12) for installing the isolation valve seat (3); when the isolation valve seat (3) is arranged in the first receiving groove (12), the second receiving groove (32) can be connected to the through hole (23).

4. The straight-through throttle orifice double isolation valve according to claim 3 is characterized in that: The flow conduit (1) is provided with a first accommodating groove (13), the isolation valve seat (3) is provided with a second accommodating groove (33), and the isolation valve seat (3) is provided with an accommodating bar (14); when the accommodating bar (14) is inserted into the first accommodating groove (13) and the second accommodating groove (33), the isolation valve seat (3) is fixed on the flow conduit (1).

5. The straight-through throttle orifice double isolation valve according to claim 1, characterized in that: A fixing strip (42) is slidably connected to the first valve body (21), and a fixing groove (261) for inserting the fixing strip (42) is provided on the operating strip (25) in the second valve body (22); when the fixing strip (42) is inserted into the fixing groove (261), the fixing strips (42) in the first valve body (21) and the second valve body (22) are fixed to each other, and the blocking strip (24) blocks the flow conduit (1).

6. The straight-through throttle orifice double isolation valve according to claim 5, characterized in that: The fixing groove (261) is connected to the through hole (23); a first magnet (421) is provided on the fixing strip (42); a second magnet (262) is provided on the operating strip (25); the second magnet (262) attracts the first magnet (421); when the blocking strip (24) is separated from the flow pipe (1), the second magnet (262) attracts the first magnet (421), and the fixing strip (42) is located in the fixing groove (261).

7. The straight-through throttle orifice double isolation valve according to claim 6, characterized in that: The fixed strip (42) is slidably connected to a movable strip (431); an operating rod (254) is provided on the operating strip (25) in the first valve body (21); the operating rod (254) protrudes from the first valve body (21); and a movable hole (27) is provided on the operating rod (254) for inserting the movable strip (431); when the movable strip (431) is inserted into the movable hole (27), the fixed strip (42) is located in the fixed groove (261), and at this time, the blocking strip (24) blocks the flow conduit (1).

8. The straight-through throttle orifice double isolation valve according to claim 7, characterized in that: A stop bar (271) is slidably connected to the operating rod (254), and a stop hole (272) is provided on the moving bar (431) for the stop bar (271) to pass through; when the stop bar (271) is inserted into the stop hole (272), the moving bar (431) is located in the moving hole (27).

9. The straight-through throttle orifice double isolation valve according to claim 7, characterized in that: A fixing plate (4) is provided on the first valve body (21), the fixing strip (42) is slidably connected to the fixing plate (4), a limiting strip (441) is slidably connected to the fixing plate (4), and a limiting hole (443) is provided on the limiting strip (441) for the fixing strip (42) to pass through; when the limiting hole (443) is aligned with the fixing strip (42), the fixing strip (42) can be separated from the fixing groove (261).

10. The straight-through throttle orifice double isolation valve according to claim 9, characterized in that: The limiting strip (441) is provided with a limiting inclined surface (442), and the distance between the limiting inclined surface (442) and the first valve body (21) gradually decreases along the direction from the moving strip (431) to the fixed strip (42), and the limiting inclined surface (442) is located in the moving path of the moving strip (431) from the moving hole (27); when the moving strip (431) is separated from the moving hole (27), the limiting hole (443) is aligned with the fixed strip (42).

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