Quickly-repairable anti-blowing and anti-washing poppet valve

Abstract

The present application relates to the technical field of the valve, and specifically discloses a kind of on-line fast repairable anti-blowing temporary valve, including valve body and valve pipe, the valve pipe is installed at the bottom end of valve body, the inner bottom of valve body is equipped with sliding hole, valve pipe and valve body are communicated with each other by sliding hole, annular mounting groove is equipped on the inner wall of valve pipe below sliding hole, first valve seat and second valve seat are respectively installed at the both ends in mounting groove, the inner bottom of mounting groove is equipped with arc-shaped clamping groove on the side close to second valve seat, valve plate is slidably installed between first valve seat and second valve seat, oval throttling ring is sleeved on the side close to second valve seat of valve plate, the bottom end of throttling ring is located in the inside of clamping groove, and the side away from valve plate of throttling ring is in abutment with second valve seat.The throttling ring opening relative to valve plate has hysteresis when the throttling ring of gas inlet side is opened, so that the friction of valve plate and first valve seat is reduced when steam flows.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of the temporary blow valve, and particularly relates to an anti-blowing temporary blow valve capable of being quickly repaired on line. BACKGROUND

[0002] Steam blowing is a key step before the formal commissioning of a new unit. Before the formal commissioning of the unit, steam blowing must be performed on the superheater, reheater and related pipelines to remove welding slag, sand, rust and other sundries dropped or left in the pipeline during construction, so that the steam quality entering the steam turbine meets the system requirements, damage to the steam turbine is avoided, and safe operation of the unit is ensured. During steam blowing, a temporary blow valve is installed on the temporary pipeline, and a test target plate is installed at a proper position downstream of the temporary blow valve. Steam is used as the power source, and the opening and closing of the temporary blow valve is controlled to blow the target pipeline.

[0003] During the operation of the temporary blow valve, high-temperature steam entrains the impurity particles in the pipeline to flow through the narrow crescent-shaped cross section formed by the valve seat and the valve plate at a very high flow rate. Under the action of the high-speed airflow erosion and the impurity particle beating and friction, the bottom end of the valve plate and the valve seat are easily damaged, the entire sealing surface is invalidated and cannot be repaired on site, a short board effect is caused to the entire valve, and the valve can only be cut off from the temporary pipeline and returned to the factory for maintenance, which seriously affects the construction period. SUMMARY

[0004] The present application aims at solving the problems in the prior art and provides an anti-blowing temporary blow valve capable of being quickly repaired on line.

[0005] To achieve the above object, the present application adopts the following technical scheme.

[0006] The anti-blowing temporary blow valve capable of being quickly repaired on line comprises a valve body and a valve pipe, the valve pipe is installed at the bottom end of the valve body, a sliding hole is formed in the inner bottom of the valve body, the valve pipe and the valve body are in communication with each other through the sliding hole, an annular mounting groove is formed in the inner wall of the valve pipe below the sliding hole, first and second valve seats are respectively installed at the two ends of the mounting groove, an arc-shaped clamping groove is arranged on the inner bottom of the mounting groove near the second valve seat, a valve plate is slidably installed between the first and second valve seats, an oval throttling ring is sleeved on the side of the valve plate near the second valve seat, the bottom end of the throttling ring is located in the clamping groove, and the side of the throttling ring away from the valve plate abuts against the second valve seat.

[0007] Preferably, the top end of the valve plate penetrates into the interior of the valve body through the sliding hole and is provided with a concave connecting block, limit grooves are formed in the inner walls of the mounting groove on both sides below the sliding hole, fixed plates are installed on the outer walls of both sides of the valve plate, the fixed plates are slidably installed in the limit grooves, and the opposite surfaces of the first valve seat and the valve plate are respectively provided with inclined surfaces matched with each other.

[0008] Preferably, the valve pipe is provided with a plurality of detection plates arranged on the inner wall of both ends in length direction, the valve body is provided with a placing groove arranged on both sides of the top, the inner wall of the placing groove is provided with a limiting hole arranged in length direction, the inside of the placing groove is provided with a display screen, the inner bottom of the placing groove is provided with a plurality of connecting rods, the connecting rods are electrically connected with the detection plates, the bottom of the display screen is provided with a plurality of insertion grooves matched with the connecting rods.

[0009] Preferably, the side of the throttle ring is provided with a plurality of screw holes, the screw holes pass through the side of the throttle ring and the valve plate, the inside of the screw holes is provided with a first bolt, the inner wall of the end of the screw hole of the throttle ring close to the valve plate is provided with an annular groove, the inside of the groove is provided with a disc spring, and the disc spring is movably arranged on the outer wall of the first bolt.

[0010] Preferably, the top of the valve body is provided with a support plate, the bottom of the support plate is provided with a valve cover, the valve cover is arranged in the inside of the valve body, the top of the support plate is provided with a fixing sleeve, and the top of the support plate is provided with a support, and the bottom end of the support is slidably arranged on the outer wall of the fixing sleeve.

[0011] Preferably, the bottom of the valve cover is provided with a through hole, the through hole passes through the valve cover and the support plate and is in communication with the inside of the fixing sleeve, the inner wall of the bottom end of the through hole is provided with a fixing groove matched with the connecting block, the inside of the through hole is movably arranged with a valve rod, and the bottom end of the valve rod is rotatably connected with the connecting block.

[0012] Preferably, the inner bottom of the support is provided with a plurality of second bolts, the bottom end of the second bolt passes through the support, the support plate and the top of the valve body, the top end of the support is provided with a threaded sleeve, the threaded sleeve is threadedly arranged on the top end outer wall of the valve rod, and the top end of the valve rod is provided with a hand wheel.

[0013] Preferably, the inner wall of the fixing sleeve is provided with an annular groove, the top end of the annular groove passes through the fixing sleeve, the inner bottom of the annular groove is provided with a packing gasket, the top of the packing gasket is provided with a packing, the top of the packing is provided with a packing pressing sleeve, and the top end of the packing pressing sleeve passes through the annular groove.

[0014] Preferably, the top of the annular groove is provided with a packing pressing plate, the packing gasket, the packing, the packing pressing sleeve and the packing pressing plate are annular and movably arranged on the outer wall of the valve rod.

[0015] Preferably, the top of the packing pressing plate is provided with a plurality of third bolts, the bottom end of the third bolt passes through the packing pressing plate and the top of the fixing sleeve, and the top end of the fixing sleeve and the packing pressing plate are arranged in the inside of the support.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] The valve plate is provided with an oval throttling ring on the side close to the second valve seat, the inside of the valve pipe is provided with a directional steam flow passage, one end of the inside of the valve pipe close to the second valve seat is an air inlet, and the other end is an air outlet, when the valve plate moves upward, a crescent-shaped gap is formed between the bottom end of the valve plate and the bottom of the mounting groove, and the bottom end of the throttling ring located on the side of the valve plate is located in the inside of the clamping groove more, so when the valve plate is disconnected from the bottom of the mounting groove and moves upward, the throttling ring does not move out of the clamping groove, the gap between the bottom end of the valve plate and the bottom of the mounting groove gradually increases to a specified area, and then the bottom end of the throttling ring completely moves out of the clamping groove, the throttling ring on the inlet side has a lag relative to the valve plate when it is opened, when the steam starts to effectively blow, the outlet side of the valve plate is fully opened, so that a large enough flow area is formed between the outlet side mounting groove and the valve plate, and the blow steam can smoothly flow through the bottom of the valve plate, so that the outlet side sealing pair is maximally protected from damage.

[0018] When the staff needs to close the steam flow in the valve pipe through the valve plate, the bottom end of the throttling ring on the side of the valve plate enters the inside of the clamping groove first, and after the throttling ring and the mounting groove cooperate to disconnect the steam flow, the valve plate abuts against the inner bottom of the mounting groove to completely close the inside of the valve pipe, the throttling ring and the valve plate are flexibly connected through the disc spring and the first bolt, so that the thickness of the valve plate has a certain elastic expansion amount, which can compensate for the manufacturing error of the valve plate, and can also absorb the linear expansion of the valve plate when the inside of the valve pipe is in a hot state, thereby effectively eliminating the risk of locking the valve plate.

[0019] In the application, the staff connects and fixes the top of the bracket, the supporting plate and the valve body through the second bolts, when the valve plate or the throttling ring is damaged and needs to be repaired or replaced during use, the staff can quickly disassemble the bracket, the supporting plate and the valve cover by disassembling the second bolts, and quickly take, repair or replace the valve plate and the throttling ring through the valve stem, when the blow is invalid for several times, the supporting plate and the bracket can be disassembled online, the valve plate and the throttling ring are taken out, and a new throttling ring is quickly and conveniently replaced without completely disassembling the valve from the temporary pipeline.

[0020] In the application, the staff can real-time understand the inside of the valve pipe and the temporary pipeline through the display screen, so that the staff can be more accurate in the operation time of lifting and moving the valve plate, prevent the gas pressure from being too small to achieve good blow effect, and prevent the gas pressure from being too large to cause damage to the temporary pipeline and the valve pipe. When in use, the staff can install and disassemble the display screen at any time, when the staff needs to understand the inside of the temporary pipeline and the valve pipe, the display screen is placed in the placing groove and slightly pressed, so that the display screen and the connecting rod are connected, and the inside of the temporary pipeline can be understood through the display screen, when the staff does not need to understand the inside of the temporary pipeline, the display screen can be directly pulled out. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A perspective view of the anti-sweeping and quick-repairable temporary impact valve is proposed in the present application;

[0022] Figure 2 A valve body sectional view of the anti-sweeping and quick-repairable temporary impact valve is proposed in the present application;

[0023] Figure 3 A valve pipe internal structure schematic view of the anti-sweeping and quick-repairable temporary impact valve is proposed in the present application;

[0024] Figure 4 A valve pipe local structure schematic view of the anti-sweeping and quick-repairable temporary impact valve is proposed in the present application;

[0025] Figure 5 A throttle ring installation structure schematic view of the anti-sweeping and quick-repairable temporary impact valve is proposed in the present application;

[0026] Figure 6 A throttle ring structure schematic view of the anti-sweeping and quick-repairable temporary impact valve is proposed in the present application;

[0027] Figure 7 A valve body structure schematic view of the anti-sweeping and quick-repairable temporary impact valve is proposed in the present application;

[0028] Figure 8 A support installation structure schematic view of the anti-sweeping and quick-repairable temporary impact valve is proposed in the present application;

[0029] Figure 9 A fixing sleeve sectional view of the anti-sweeping and quick-repairable temporary impact valve is proposed in the present application.

[0030] In the figure: 1, valve body; 2, valve pipe; 3, support plate; 4, support; 5, threaded sleeve; 6, hand wheel; 7, valve rod; 8, placing groove; 9, limiting hole; 10, detection plate; 11, first bolt; 12, valve plate; 13, throttle ring; 14, first valve seat; 15, second valve seat; 16, valve cover; 17, sliding hole; 18, limiting groove; 19, display screen; 20, installation groove; 21, clamping groove; 22, connecting block; 23, second bolt; 24, fixed plate; 25, groove; 26, disc spring; 27, connecting rod; 28, fixed groove; 29, third bolt; 30, fixing sleeve; 31, annular groove; 32, packing gasket; 33, packing; 34, packing pressing sleeve; 35, packing pressing plate. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0032] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0033] Referring to Figures 1-9 A kind of anti-sweeping temporary valve of quick repair on line, including valve body 1 and valve pipe 2, valve pipe 2 is installed at the bottom end of valve body 1, the inner bottom of valve body 1 is provided with sliding hole 17, valve pipe 2 and valve body 1 are communicated with each other by sliding hole 17, annular mounting groove 20 is set up on the inner wall of valve pipe 2 below sliding hole 17, the inner bottom of mounting groove 20 is provided with arc-shaped clamping groove 21 on the side close to second valve seat 15, first valve seat 14 and second valve seat 15 are slidably installed between mounting groove 20, oval throttling ring 13 is sleeved on the side of valve plate 12 close to second valve seat 15, the bottom end of throttling ring 13 is located in the inside of clamping groove 21, the side of throttling ring 13 away from valve plate 12 is in abutment with second valve seat 15.

[0034] As a kind of technical optimization scheme of the application, the top end of valve plate 12 is penetrated to the inside of valve body 1 by sliding hole 17, and is provided with concave connecting block 22, the inner wall of mounting groove 20 on the two sides below sliding hole 17 is provided with limiting slot 18, the outer wall of valve plate 12 on the two sides is provided with fixed plate 24, fixed plate 24 is slidably installed in the inside of limiting slot 18, the opposite surfaces of first valve seat 14 and valve plate 12 are provided with mutually matched inclined surfaces;Use asymmetric valve plate 12, so that valve plate 12 can still better lift and cooperate with the inclined surface on first valve seat 14, so that valve plate 12 is more stable when moving down.

[0035] As a kind of technical optimization scheme of the application, the inner wall of valve pipe 2 on the two ends is provided with a plurality of detection plates 10 in length direction, the top of valve body 1 on the two sides is provided with placing groove 8, the inner wall of placing groove 8 is provided with limiting hole 9 in length direction, display screen 19 is installed in the inside of placing groove 8, a plurality of connecting rods 27 are installed on the inner bottom of placing groove 8, connecting rod 27 and detection plate 10 are electrically connected with each other, the bottom of display screen 19 is provided with a plurality of insertion slots matched with connecting rod 27;When in use, a plurality of detection plates 10 include air pressure detection plate, temperature detection plate and air flow rate detection plate, which can realize real-time understanding of the state inside valve pipe 2 and temporary pipeline.

[0036] As a technical optimization scheme of the present application, a plurality of screw holes are formed in the side surface of the throttle ring 13, the screw holes penetrating the side surface of the throttle ring 13 and the valve plate 12, a first bolt 11 is installed in the screw hole, an annular groove 25 is formed in the inner wall of the screw hole near one end of the valve plate 12, a disc spring 26 is installed in the annular groove 25, and the disc spring 26 is movably installed on the outer wall of the first bolt 11; when the throttle ring 13 is used, it can block the flow of gas in the pipeline when the gap between the valve plate 12 and the inner bottom wall of the valve pipe 2 is small, and when the gap between the valve plate 12 and the inner bottom wall of the valve pipe 2 is increased to a specified size, the gas flow passes through the gap, which can better protect the valve plate 12 and the two valve seats.

[0037] As a technical optimization scheme of the present application, a support plate 3 is installed on the top of the valve body 1, a valve cover 16 is installed on the bottom of the support plate 3, the valve cover 16 is located in the inside of the valve body 1, a fixed sleeve 30 is installed on the top of the support plate 3, a bracket 4 is installed on the top of the support plate 3, and the bottom end of the bracket 4 is slidably installed on the outer wall of the fixed sleeve 30; the bracket 4 can better protect the top end of the fixed sleeve 30 when in use, and the fixed sleeve 30 can better limit the installation position of the bracket 4.

[0038] As a technical optimization scheme of the present application, a through hole is formed in the bottom of the valve cover 16, the through hole penetrates the valve cover 16 and the support plate 3, and is in communication with the inside of the fixed sleeve 30, a fixed groove 28 matched with the connecting block 22 is formed in the inner wall of the bottom end of the through hole, a valve rod 7 is movably installed in the through hole, and the bottom end of the valve rod 7 is rotatably connected with the connecting block 22; in use, the staff can drive the valve plate 12 to move up and down through the valve rod 7 to start and stop the flow in the valve pipe 2.

[0039] As a technical optimization scheme of the present application, a plurality of second bolts 23 are installed on the inner bottom of the bracket 4, the bottom end of the second bolt 23 penetrates the bracket 4, the support plate 3 and the top of the valve body 1, a threaded sleeve 5 is installed on the top end of the valve rod 7, the threaded sleeve 5 is threadedly installed on the outer wall of the top end of the valve rod 7, and a hand wheel 6 is installed on the top end of the valve rod 7; the staff can drive the valve rod 7 to threadedly rotate with the threaded sleeve 5 through the hand wheel 6, and drive the valve rod 7 to move up and down at a specified height through the threaded connection.

[0040] As a technical optimization scheme of the present application, an annular groove 31 is formed in the inner wall of the fixed sleeve 30, the annular groove 31 penetrates the fixed sleeve 30, a packing pad 32 is installed in the inner bottom of the annular groove 31, a packing 33 is installed on the top of the packing pad 32, a packing pressing sleeve 34 is installed on the top of the packing 33, and the top end of the packing pressing sleeve 34 penetrates the annular groove 31; the packing pad 32 and the packing 33 can seal the gap between the inner wall of the fixed sleeve 30 and the outer wall of the valve rod 7 when in use.

[0041] As a technical optimization scheme of the present application, the top of the annular groove 31 is provided with a packing pressing plate 35, the packing gasket 32, the packing 33, the packing pressing sleeve 34 and the packing pressing plate 35 are all annular and movably installed on the outer wall of the valve rod 7; the packing gasket 32, the packing 33 and the packing pressing plate 35 can seal the gap between the outer wall of the valve rod 7 and the inner wall of the fixed sleeve 30, and also can protect and guide the movement of the outer wall of the valve rod 7.

[0042] As a technical optimization scheme of the present application, the top of the packing pressing plate 35 is provided with a plurality of third bolts 29, the bottom end of the third bolt 29 penetrates the top of the packing pressing plate 35 and the fixed sleeve 30, and the top end of the fixed sleeve 30 and the packing pressing plate 35 are both located in the inside of the bracket 4; in use, the third bolt 29 can drive the packing pressing plate 35 and the packing pressing sleeve 34 to extrude the packing 33, so that the inner wall of the packing 33 is in close contact with the outer wall of the valve rod 7, and the sealing performance of the packing 33 is better.

[0043] In use, the staff connects both ends of the valve pipe 2 to the temporary pipeline, one end of the valve pipe 2 close to the second valve seat 15 is the gas inlet, and the other end close to the first valve seat 14 is the gas outlet, and in use, the gas is transported in one direction. In use, the staff installs the throttle ring 13 on the side of the valve plate 12 close to the gas inlet, and connects and fixes the throttle ring 13 and the valve plate 12 through the first bolt 11 and the disc spring 26, and in use, the throttle ring 13 and the valve plate 12 are flexibly connected through the disc spring 26 and the first bolt 11, so that the thickness of the valve plate 12 has a certain elastic expansion amount, which can compensate for the error caused by the machining of the valve plate 12, and can also absorb the linear expansion of the valve plate 12 when the valve pipe 2 is in hot working state, and in use, the risk of locking of the valve plate 12 can be effectively eliminated, and when the valve pipe 2 is heated by steam, the two sides of the valve plate 12 are slightly expanded, which slightly extrudes the disc spring 26 and the throttle ring 13, and the overall thickness of the valve plate 12 and the throttle ring 13 does not change through the elastic expansion amount of the disc spring 26, so as to prevent the valve plate 12 from being locked in use, which causes the valve plate 12 to be unable to move up and down.

[0044] When in use, the staff installs the valve rod 7 and the bottom end of the valve plate 12 inside the valve body 1 and the valve pipe 2, when installing the valve plate 12, the fixed plate 24 on both sides of the valve plate 12 moves to the inside of the limiting groove 18 and moves to the bottom end of the inner wall of the valve pipe 2 until the bottom end of the valve plate 12 abuts against the inner bottom of the installation groove 20, and the bottom end of the throttle ring 13 on the side of the valve plate 12 is located in the clamping groove 21, and the limiting groove 18 can better guide and position limit the movement of the valve plate 12 in use, and improve the stability of the valve plate 12 during movement.

[0045] When the staff installs the valve rod 7 and the valve plate 12, the staff can install the valve cover 16 and the support plate 3 in turn, and the valve cover 16 is fixed on the bottom of the support plate 3 in use, so that the support plate 3 can better position limit the valve cover 16 by abutting against the top of the valve body 1, the staff installs the third bolt 29, and the packing sleeve 34 drives the packing 33 to be extruded by rotating the third bolt 29, so that the inner wall of the packing 33 better contacts the outer wall of the valve rod 7, and the packing 33 can better seal the gap between the inner wall of the fixed sleeve 30 and the outer wall of the valve rod 7 in use. In use, the threaded sleeve 5 at the top end of the support 4 is screwed on the top end of the outer wall of the valve rod 7, and the staff connects and fixes the top of the support 4, the support plate 3 and the valve body 1 by the second bolts 23, when the valve plate 12 or the throttle ring 13 is damaged and needs to be repaired or replaced, the staff can quickly disassemble the support 4, the support plate 3 and the valve cover 16 by disassembling the second bolts 23, and quickly take, repair or replace the valve plate 12 and the throttle ring 13 by the valve rod 7.

[0046] When the staff needs to move the valve plate 12 upward, so that the gas inside the valve pipe 2 near the inlet end is transported to the other end, the staff drives the valve rod 7 to rotate by rotating the hand wheel 6, and drives the valve rod 7 to move upward by the threaded connection between the valve rod 7 and the threaded sleeve 5. In use, the two sides of the valve plate 12 are connected with the limiting groove 18 through the fixed plate 24, and the sliding hole 17 positions the top end of the valve plate 12, so that the valve rod 7 only drives the valve plate 12 to move upward when rotating and moving upward, and does not drive the valve plate 12 to rotate, and the valve plate 12 has better stability when moving upward.

[0047] When the valve plate 12 moves upward, the bottom end of the valve plate 12 gradually breaks the contact with the bottom of the installation groove 20, and a crescent-shaped arc gap is formed between the bottom end of the valve plate 12 and the bottom of the installation groove 20. The bottom end of the throttle ring 13 on the side of the valve plate 12 is located inside the clamping groove 21 more, so when the valve plate 12 moves upward and breaks the contact with the bottom of the installation groove 20, the throttle ring 13 does not move out of the clamping groove 21. When the valve plate 12 continues to move upward, the gap between the bottom end of the valve plate 12 and the bottom of the installation groove 20 gradually increases to a specified area, and the bottom end of the throttle ring 13 completely moves out of the clamping groove 21. The steam inside the valve pipe 2 near the inlet port flows through the gap between the bottom end of the throttle ring 13 and the bottom of the installation groove 20 to the other end of the valve pipe 2. At this time, because the gap between the bottom end of the valve plate 12 and the bottom of the installation groove 20 is large enough, the welding slag, sand, rust and other impurities carried by the steam flow will not cause serious friction damage to the bottom end of the valve plate 12 and the first valve seat 14. In use, the valve plate 12 and the first valve seat 14 can be better protected, and the flow of steam and impurities through the gap between the bottom end of the valve plate 12 and the bottom of the installation groove 20 when the gap is small can prevent serious friction damage to the valve plate 12 and the first valve seat 14.

[0048] When the inlet side throttle ring 13 is opened, it has a lag relative to the valve plate 12. When the steam starts to effectively blow, the outlet side of the valve plate 12 is fully opened, forming a large enough flow area between the outlet side installation groove 20 and the valve plate 12, so that the blowout steam can flow smoothly below the valve plate 12, and the outlet side sealing pair is maximally protected from damage. When the staff needs to close the steam flow in the valve pipe 2 through the valve plate 12, the valve plate 12 is driven downward by the hand wheel 6 and the valve rod 7, and the bottom end of the throttle ring 13 on the side of the valve plate 12 enters the inside of the clamping groove 21 first. After the throttle ring 13 cooperates with the installation groove 20 to break the steam flow, the valve plate 12 abuts against the inner bottom of the installation groove 20 to completely close the inside of the valve pipe 2.

[0049] During use, a number of detection plates 10 with different functions are installed on the inner walls of both ends of the valve tube 2, including a temperature detection plate, an air pressure detection plate, and an air flow rate detection plate, and are interconnected with the display screen 19 through a connecting rod 27, so that the staff can understand the situation inside the valve tube 2 and the temporary pipeline in real time through the display screen 19, so that the staff can more accurately operate the valve plate 12 when it is raised and lowered, to prevent the air pressure from being too low to achieve a good purge effect, and to prevent the air pressure from being too high to cause damage to the temporary pipeline and the valve tube 2. During use, the staff can install and disassemble the display screen 19 at any time. When the staff needs to understand the interior of the temporary pipeline and the valve tube 2, the display screen 19 is placed in the placement slot 8 and pressed lightly, so that the display screen 19 and the connecting rod 27 are connected to each other, and the interior of the temporary pipeline can be understood through the display screen 19. When the staff does not need to understand the interior of the temporary pipeline, the display screen 19 can be directly pulled out.

[0050] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An anti-purge impending valve capable of rapid online repair, comprising a valve body (1) and a valve pipe (2), characterized in that: The valve tube (2) is mounted on the bottom end of the valve body (1), and a sliding hole (17) is provided on the inner bottom of the valve body (1). The valve tube (2) and the valve body (1) are connected to each other through the sliding hole (17). An annular mounting groove (20) is provided on the inner wall of the valve tube (2) below the sliding hole (17). A first valve seat (14) and a second valve seat (15) are respectively installed at both ends of the inner portion of the mounting groove (20). An arc-shaped clamping groove (21) is provided on one side of the inner bottom of the mounting groove (20) close to the second valve seat (15); A valve plate (12) is slidably mounted between the first valve seat (14) and the second valve seat (15); an elliptical throttling ring (13) is sleeved on a side of the valve plate (12) close to the second valve seat (15); the bottom end of the throttling ring (13) is located inside the clamping groove (21); and a side of the throttling ring (13) away from the valve plate (12) abuts against the second valve seat (15); The top end of the valve plate (12) passes through the interior of the valve body (1) through the sliding hole (17) and is installed with a concave connecting block (22). Limiting grooves (18) are provided on the inner walls of both sides of the installation groove (20) below the sliding hole (17). Fixed plates (24) are installed on the outer walls of both sides of the valve plate (12). The fixed plates (24) are slidably installed inside the limiting grooves (18). The opposing surfaces of the first valve seat (14) and the valve plate (12) are provided with mutually matching inclined surfaces. The side of the throttle ring (13) is provided with a plurality of screw holes, which penetrate the side of the throttle ring (13) and the valve plate (12). The internal threads of the screw holes are provided with first bolts (11). An annular groove (25) is provided on the inner wall of the screw hole on the throttle ring (13) near one end of the valve plate (12). A disc spring (26) is provided inside the groove (25). The disc spring (26) is movably provided on the outer wall of the first bolt (11).

2. The anti-purge valve capable of online rapid repair according to claim 1, characterized in that: A plurality of detection plates (10) are installed on the inner walls of both ends of the valve tube (2) in the longitudinal direction, a placement groove (8) is provided on both sides of the top of the valve body (1), a limiting hole (9) is provided on the inner wall of the placement groove (8) in the longitudinal direction, a display screen (19) is installed inside the placement groove (8), and a plurality of connecting rods (27) are installed on the inner bottom of the placement groove (8), the connecting rods (27) and the detection plates (10) are electrically connected to each other, and a plurality of slots matching the connecting rods (27) are provided at the bottom of the display screen (19).

3. The anti-purge valve capable of online rapid repair according to claim 1, characterized in that: A support plate (3) is mounted on the top of the valve body (1), a valve cover (16) is mounted on the bottom of the support plate (3), the valve cover (16) is located inside the valve body (1), a fixing sleeve (30) is mounted on the top of the support plate (3), a bracket (4) is mounted on the top of the support plate (3), and the bottom end of the bracket (4) is slidably mounted on the outer wall of the fixing sleeve (30).

4. The anti-purge valve capable of online rapid repair according to claim 3 is characterized in that: A through hole is provided at the bottom of the valve cover (16), which passes through the valve cover (16) and the support plate (3) and is communicated with the interior of the fixing sleeve (30). A fixing groove (28) matching the connecting block (22) is provided on the inner wall of the bottom end of the through hole. A valve stem (7) is movably installed in the through hole, and the bottom end of the valve stem (7) is rotatably connected to the connecting block (22).

5. The anti-purge valve capable of online rapid repair according to claim 4, characterized in that: A plurality of second bolts (23) are installed at the inner bottom of the bracket (4), the bottom ends of the second bolts (23) pass through the bracket (4), the support plate (3) and the top of the valve body (1), a threaded sleeve (5) is installed at the top end of the bracket (4), the threaded sleeve (5) is threadedly installed on the top outer wall of the valve stem (7), and a hand wheel (6) is installed at the top end of the valve stem (7).

6. The anti-purge valve capable of online rapid repair according to claim 4, characterized in that: An annular groove (31) is formed on the inner wall of the fixing sleeve (30), the top of the annular groove (31) passes through the fixing sleeve (30), a stuffing pad (32) is installed on the inner bottom of the annular groove (31), a stuffing (33) is installed on the top of the stuffing pad (32), a stuffing pressing sleeve (34) is installed on the top of the stuffing (33), and the top of the stuffing pressing sleeve (34) passes through the annular groove (31).

7. The anti-purge impending valve capable of online rapid repair according to claim 6, characterized in that: A packing pressure plate (35) is installed on the top of the annular groove (31). The packing pad (32), the packing (33), the packing pressure sleeve (34) and the packing pressure plate (35) are all annular and are movably installed on the outer wall of the valve stem (7).

8. The anti-purge impending valve capable of online rapid repair according to claim 7, characterized in that: A plurality of third bolts (29) are installed on the top of the packing pressure plate (35), and the bottom ends of the third bolts (29) pass through the top of the packing pressure plate (35) and the fixing sleeve (30). The top end of the fixing sleeve (30) and the packing pressure plate (35) are both located inside the bracket (4).

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