CN218062339U - Tail liquid outlet safety valve - Google Patents

Abstract

The utility model discloses a afterbody goes out liquid relief valve, including water conservancy diversion valve casing, reset spring, water conservancy diversion spring holder and water conservancy diversion pressure regulating screw, reset spring is located between water conservancy diversion spring holder and the water conservancy diversion pressure regulating screw, and the water conservancy diversion spring holder includes the guide section and sets up the first boss on the guide section, the water conservancy diversion pressure regulating screw include with the water conservancy diversion valve casing is threaded connection's pressure regulating screw body and sets up the second boss on the pressure regulating screw body, on first boss was located to reset spring's a pot head, on the second boss was located to reset spring's another pot head. The utility model discloses a afterbody goes out liquid relief valve, through the cooperation of water conservancy diversion spring holder and water conservancy diversion pressure regulating screw, can be so that reset spring's axial positioning is more reliable, reset spring can not crooked slope in the valve casing, can radially appear shifting, improved reset spring's guidance performance, ensure that reset spring's axial force is more excellent.

Description

Tail liquid outlet safety valve

Technical Field

The utility model belongs to the technical field of the colliery is fully mechanized and is adopted hydraulic support, specifically speaking, the utility model relates to a afterbody goes out liquid relief valve.

Background

At present, in coal mine machinery, a safety valve is one of the most important hydraulic elements of a hydraulic support for a coal mine, and in a control system of the hydraulic support, the actual working resistance of the hydraulic support is controlled not to exceed an allowable value so as to ensure the normal supporting capability of the hydraulic support and provide a reliable safety factor.

The existing tail liquid outlet safety valve has the following defects: the axial positioning reliability of the return spring inside the guide valve casing is poor, the problems of bending inclination and radial displacement of the return spring easily occur in the guide valve casing, and the stability of the axial acting force of the return spring cannot be ensured.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a afterbody goes out liquid relief valve, the purpose improves reset spring axial positioning's reliability.

In order to realize the purpose, the utility model discloses the technical scheme who takes does: afterbody goes out liquid relief valve, including water conservancy diversion valve casing, reset spring, water conservancy diversion spring holder and water conservancy diversion pressure regulating screw, reset spring is located between water conservancy diversion spring holder and the water conservancy diversion pressure regulating screw, and the water conservancy diversion spring holder includes the guide section and sets up the first boss on the guide section, the water conservancy diversion pressure regulating screw include with the water conservancy diversion valve casing is threaded connection's pressure regulating screw body and sets up the second boss on the pressure regulating screw body, on first boss was located to reset spring's a pot head, on the second boss was located to reset spring's another pot head.

The second boss is of a circular block structure.

The guide spring seat further comprises a third boss arranged on the guide section, the first boss and the third boss respectively extend out towards two opposite sides of the guide section, and the third boss is spherical.

The utility model discloses a afterbody goes out liquid relief valve, through the cooperation of water conservancy diversion spring holder and water conservancy diversion pressure regulating screw, can be so that reset spring's axial positioning is more reliable, reset spring can not crooked slope in the water conservancy diversion valve casing, can radially appear shifting, improved reset spring's guidance performance, ensure that reset spring's axial force is more excellent.

Drawings

The present specification includes the following figures, which show the contents:

fig. 1 is a sectional view of the tail liquid outlet safety valve of the utility model;

FIG. 2 is a cross-sectional view of a diverter valve body;

FIG. 3 is a cross-sectional view of the valve cartridge;

fig. 4 is a cross-sectional view of the valve sleeve;

FIG. 5 is a cross-sectional view of a flow directing insert;

FIG. 6 is a side view of the inducer insert;

FIG. 7 is a cross-sectional view of a deflector spring seat;

FIG. 8 is a side view of a deflector spring seat;

FIG. 9 is a side view of a pressure adjustment screw;

FIG. 10 is a cross-sectional view of the fluid return fitting;

labeled as: 1. a flow guide valve body; 101. a first liquid inlet hole; 2. a valve core; 201. a first liquid passing hole; 202. an eighth liquid passing hole; 203. a second liquid inlet hole; 3. a valve housing; 301. a second liquid passing hole; 4. a flow guide screw sleeve; 401. a third liquid passing hole; 402. a fourth liquid passing hole; 403. a ninth liquid passing hole; 404. a first flow guide part; 405. a connecting portion; 406. a second flow guide part; 5. a diversion spring seat; 501. a fifth liquid passing hole; 502. a sixth liquid passing hole; 503. a first boss; 504. a guide section; 505. a third boss; 6. a return spring; 7. a diversion pressure regulating screw; 701. a seventh liquid passing hole; 702. a pressure regulating screw body; 703. a second boss; 8. a liquid return joint; 801. a drain hole; 9. a flow guide valve shell; 10. a spacer ring; 11. a first inner seal ring; 12. a second inner seal ring; 13. a third inner seal ring; 14. a first outer seal ring; 15. a second outer seal ring; 16. and a third outer seal ring.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, for the purpose of helping those skilled in the art to understand more completely, accurately and deeply the conception and technical solution of the present invention, and to facilitate its implementation.

As shown in fig. 1 to fig. 10, the utility model provides a afterbody goes out liquid relief valve, including the flow guide valve body 1, the flow guide valve casing 9 of being connected with the flow guide valve body 1, the case 2 of portable setting, set up in 1 inside and the cover of flow guide valve body and locate the water conservancy diversion swivel nut 4 on case 2, set up the valve barrel 3 between water conservancy diversion swivel nut 4 and case 2, mobilizable setting is in the inside water conservancy diversion spring holder 5 of flow guide valve casing 9, set up in the inside water conservancy diversion pressure regulating screw 7 of flow guide valve casing 9, set up reset spring 6 between water conservancy diversion spring holder 5 and water conservancy diversion pressure regulating screw 7 and set up the liquid return joint 8 on flow guide valve casing 9. The utility model discloses an overflow path of afterbody play liquid relief valve is including setting up the first liquid hole 201 of crossing on case 2, set up the second on valve barrel 3 and cross liquid hole 301, set up third on water conservancy diversion swivel nut 4 and cross liquid hole 401 and fourth liquid hole 402, set up fifth on water conservancy diversion spring holder 5 and cross liquid hole 501 and sixth liquid hole 502, set up seventh on water conservancy diversion pressure regulating screw 7 and cross liquid hole 701 and set up the outage 801 on returning liquid joint 8, fourth is crossed liquid hole 402 and is set up a plurality of and all fourth and cross liquid hole 402 and distribute around the axis of water conservancy diversion swivel nut 4, fifth is crossed liquid hole 501 and is set up a plurality of and all fifth and cross liquid hole 501 and distribute around the axis of water conservancy diversion spring holder 5. The liquid return connector 8 is used for being connected with a movable connector in an inserting mode, the movable connector is used for being connected with an oil tank for collecting emulsion, and the inserting connection is quick and convenient, so that the movable connector can be conveniently connected.

The utility model discloses a relief valve opens the back, and the emulsion connects 8 through overflow channel flow direction return liquid, connects 8 outside discharges through return liquid, conveniently collects discharged emulsion, and this kind of off-load mode liquid flow area is big moreover, and the flow is bigger more direct, and the loss of resistance is little, can satisfy the overflow requirement of large-traffic relief valve.

Specifically speaking, the utility model discloses an in-process is gone out to afterbody liquid safety valve, case 2 promotes position department removal that water conservancy diversion spring holder 5 orientation is close to water conservancy diversion pressure regulating screw 7, move to the first position department of crossing liquid hole 301 and aligning of crossing of second on valve barrel 3 until case 2, the emulsion that gets into in the second feed liquor hole 203 passes through first liquid hole 201 in proper order, the second passes liquid hole 301, the third passes liquid hole 401, the fourth passes liquid hole 402, the fifth passes liquid hole 501, the sixth passes in liquid hole 502 gets into the interior cavity of water conservancy diversion valve casing 9, the emulsion that gets into in the interior cavity of water conservancy diversion valve casing 9 again passes liquid hole 701 through the seventh and flows to outage 801, finally in flowing into external oil tank through liquid return joint 8, realize the recovery of emulsion.

As shown in fig. 1 and fig. 2, the flow guiding valve body 1 is a cylindrical member with two open ends and a hollow interior, the flow guiding valve housing 9 is connected with the flow guiding valve body 1 at one end of the flow guiding valve body 1 and is in threaded connection with the flow guiding valve housing 9, the flow guiding valve body 1 is screwed into the flow guiding valve housing 9 at one end of the flow guiding valve housing 9 and is in threaded connection with the flow guiding valve housing 9, and the liquid returning connector 8 is screwed into the flow guiding valve housing 9 at the other end of the flow guiding valve housing 9 and is in threaded connection with the flow guiding valve body 1. The diversion pressure regulating screw 7, reset spring 6 and diversion spring seat 5 constitute the canceling release mechanical system that impel case 2 to remove and make afterbody go out liquid relief valve and close, diversion pressure regulating screw 7, reset spring 6 and diversion spring seat 5 are located the inner cavity body of diversion valve casing 9, reset spring 6 presss from both sides between diversion pressure regulating screw 7 and diversion spring seat 5, diversion spring seat 5 is pushed by reset spring 6 and case 2 in diversion valve casing 9 and can be followed the axial slip, case 2 impels diversion spring seat 5 to move towards diversion pressure regulating screw 7 department and can make the relief valve open, reset spring 6 impels diversion spring seat 5 to move towards disk seat department and can make the relief valve close.

As shown in fig. 1 to 3, a first liquid inlet hole 101 is formed in the center of the inner portion of the guide valve body 1, and the first liquid inlet hole 101 is a circular hole that starts from the center of the end surface of the guide valve body 1 and extends toward the inner portion of the guide valve body 1 along the axial direction. The valve sleeve 3 is provided with a second liquid passing hole 301, the valve core 2 is provided with a second liquid inlet hole 203 communicated with the first liquid inlet hole 101 and a first liquid passing hole 201 communicated with the second liquid inlet hole 203 and used for guiding emulsion to the second liquid passing hole 301, the first liquid inlet hole 101 guides the emulsion to the second liquid inlet hole 203, the second liquid inlet hole 203 is a round hole formed in the center of the inner portion of the valve core 2, the second liquid inlet hole 203 and the first liquid inlet hole 101 are coaxially arranged, an opening allowing the emulsion to pass through is formed in the end face, facing the first liquid inlet hole 101, of the valve core 2 through the second liquid inlet hole 203, and the length of the second liquid inlet hole 203 is smaller than that of the valve core 2. The valve core 2 is matched with the valve sleeve 3 and the flow guide screw sleeve 4 and used for controlling the opening and closing of the safety valve.

When the oil pressure in the first liquid inlet hole 101 reaches the opening pressure of the safety valve, the emulsion pushes the valve element 2 to move in the direction away from the first liquid inlet hole 101 along the axial direction, after the first liquid passing hole 201 is aligned with the second liquid passing hole 301, the first liquid passing hole 201 is communicated with the second liquid passing hole 301, the safety valve is opened, the emulsion entering the second liquid inlet hole 203 through the first liquid inlet hole 101 enters the inner cavity of the diversion valve housing 9 through the first liquid passing hole 201, the second liquid passing hole 301, the third liquid passing hole 401, the fourth liquid passing hole 402, the fifth liquid passing hole 501 and the sixth liquid passing hole 502 in sequence, the emulsion entering the inner cavity of the diversion valve housing 9 flows to the liquid discharge hole 801 through the seventh liquid passing hole 701, and finally flows into the external oil tank through the liquid return joint 8.

As shown in fig. 1 and fig. 3, the valve core 2 is a cylinder, the valve core 2 is movably disposed along the axial direction, the valve core 2 and the valve body are coaxially disposed, the first liquid passing hole 201 is a through hole radially penetrating through the circular sidewall of the valve core 2 surrounding the second liquid inlet hole 203, the first liquid passing hole 201 is a circular hole, and the axis of the first liquid passing hole 201 is perpendicular to the axis of the second liquid inlet hole 203. The valve core 2 further has an eighth liquid passing hole 202, the eighth liquid passing hole 202 is a through hole radially penetrating through the circular side wall of the valve core 2 surrounding the second liquid inlet hole 203, the eighth liquid passing hole 202 is a circular hole, the axis of the eighth liquid passing hole 202 is perpendicular to the axis of the second liquid inlet hole 203, and the first liquid passing hole 201 and the eighth liquid passing hole 202 are communicated with the second liquid inlet hole 203. The position of the first liquid passing hole 201 on the valve core 2 is close to the opening end of the valve core 2, and the position of the eighth liquid passing hole 202 on the valve core 2 is close to the closing end of the valve core 2.

As shown in fig. 1 and 4, the valve sleeve 3 is a cylindrical member with two open ends and a hollow interior, the valve sleeve 3 is sleeved on the valve core 2, the valve sleeve 3 and the valve core 2 are coaxially arranged, the valve core 2 penetrates through a central hole of the valve sleeve 3, and the length of the valve sleeve 3 is smaller than that of the valve core 2. The valve sleeve 3 is provided with a second liquid passing hole 301, the second liquid passing hole 301 is a through hole radially penetrating through the circular side wall of the valve sleeve 3, the second liquid passing hole 301 is a circular hole, and the axis of the second liquid passing hole 301 is perpendicular to the axis of the valve sleeve 3.

As shown in fig. 1, the overflow path of the tail liquid outlet safety valve of the present invention further includes an eighth liquid passing hole 202 disposed on the valve core 2 and a ninth liquid passing hole 403 disposed on the diversion thread insert 4, and in the axial direction of the diversion thread insert 4, the ninth liquid passing hole 403 is located between the third liquid passing hole 401 and the fourth liquid passing hole 402.

As shown in fig. 1 and 5, the flow guide screw sleeve 4 is a cylindrical member with two open ends and a hollow interior, a part of the flow guide screw sleeve 4 is sleeved on the valve sleeve 3, the other part of the flow guide screw sleeve 4 is sleeved on the valve core 2, the valve sleeve 3 and the flow guide screw sleeve 4 are fixedly arranged in the inner cavity of the flow guide valve body 1, and the flow guide screw sleeve 4 is coaxially arranged with the valve core 2, the flow guide valve body 1 and the valve sleeve 3. The water conservancy diversion swivel nut 4 is threaded connection with the water conservancy diversion valve body 1, makes things convenient for the dismouting, and is corresponding, sets up the external screw thread on the outer disc of water conservancy diversion swivel nut 4, sets up the internal thread on the interior disc of water conservancy diversion valve body 1. The flow guide threaded sleeve 4 is provided with a third liquid passing hole 401, a fourth liquid passing hole 402 and a ninth liquid passing hole 403, the third liquid passing hole 401 is a through hole which is radially arranged on the circular side wall of the flow guide threaded sleeve 4 in a penetrating mode, the third liquid passing hole 401 is a circular hole, and an included angle is formed between the axis of the third liquid passing hole 401 and the axis of the flow guide threaded sleeve 4 and is an acute angle. That is, the third liquid passing hole 401 adopts an inclined hole design, so that the liquid flows out more smoothly, the resistance loss is less, and the processing is easy. The ninth liquid passing hole 403 is a through hole radially penetrating through the circular side wall of the flow guide threaded sleeve 4, the ninth liquid passing hole 403 is a circular hole, and the axis of the ninth liquid passing hole 403 is perpendicular to the axis of the flow guide threaded sleeve 4. When the oil pressure in the first liquid inlet hole 101 reaches the opening pressure of the safety valve, the emulsion pushes the valve element 2 to move in the direction away from the first liquid inlet hole 101 along the axial direction, after the first liquid passing hole 201 is aligned with the second liquid passing hole 301, the eighth liquid passing hole 202 is aligned with the ninth liquid passing hole 403, the first liquid passing hole 201 is communicated with the second liquid passing hole 301, the eighth liquid passing hole 202 is communicated with the ninth liquid passing hole 403, the safety valve is opened, the emulsion entering the second liquid inlet hole 203 through the first liquid inlet hole 101 flows to the fourth liquid passing hole 402 through the first liquid passing hole 201, the second liquid passing hole 301 and the third liquid passing hole 401 in sequence, meanwhile, the emulsion in the second liquid inlet hole 203 can flow to the fourth liquid passing hole 402 through the eighth liquid passing hole 202 and the ninth liquid passing hole 401, then the emulsion sequentially passes through the fifth liquid passing hole 501 and the sixth liquid passing hole 502 to enter the inner cavity of the valve housing of the flow guide box 9, and finally flows to the external liquid discharge connector 701 through the emulsion returning hole 701.

As shown in fig. 1, 5 and 6, the axis of the fourth liquid passing hole 402 is parallel to the axis of the guide nut 4, and all the fourth liquid passing holes 402 are uniformly distributed on the guide nut 4 along the circumferential direction with the axis of the guide nut 4 as the center line. The third liquid passing hole 401 and the fourth liquid passing hole 402 are respectively arranged at two opposite axial ends of the guide screw sleeve 4, an unloading cavity for containing emulsion is formed between the outer wall surface of the guide screw sleeve 4 and the inner circular surface of the guide valve body 1, the unloading cavity is positioned between the third liquid passing hole 401 and the fourth liquid passing hole 402 and communicated with the third liquid passing hole 401 and the fourth liquid passing hole 402, the second liquid passing hole 301 and the third liquid passing hole 401 are in a communicated state, and the emulsion from the second liquid passing hole 301 sequentially flows to the fourth liquid passing hole 402 through the third liquid passing hole 401 and the unloading cavity. Set up a plurality of fourth and cross liquid hole 402, improve the off-load ability of relief valve, the emulsion flows through and flows towards inside the guide valve casing 9 behind the fourth liquid hole 402 of crossing, and this kind of off-load mode liquid flow area is big, and the flow is bigger more direct, and the resistance loss is little to can satisfy the overflow requirement of large-traffic relief valve.

As shown in fig. 1, 5 and 6, the flow guide screw sleeve 4 includes a first flow guide portion 404, a second flow guide portion 406, and a connecting portion 405 connected to the first flow guide portion 404 and the second flow guide portion 406 and located between the first flow guide portion 404 and the second flow guide portion 406, the first flow guide portion 404, the second flow guide portion 406, and the connecting portion 405 are all circular structures, the first flow guide portion 404, the connecting portion 405, and the second flow guide portion 406 are sequentially arranged along an axial direction of the flow guide screw sleeve 4, the first flow guide portion 404, the connecting portion 405, and the second flow guide portion 406 are coaxially arranged, the third liquid passing hole 401 is arranged on the first flow guide portion 404, the first flow guide portion 404 is sleeved on the valve sleeve 3, an inner circular surface of the first flow guide portion 404 is attached to an outer circular surface of the valve sleeve 3, two sealing rings are arranged between the first flow guide portion 404 and the valve sleeve 3, and the second liquid passing hole 301 is located between the two sealing rings. The connecting portion 405 is sleeved on the valve element 2, an inner circular surface of the connecting portion 405 is attached to an outer circular surface of the valve element 2, the ninth liquid passing hole 403 is a through hole radially penetrating the connecting portion 405, and the ninth liquid passing hole 403 is in a communication state with the unloading cavity. The second flow guiding portion 406 is sleeved on the valve element 2, the second flow guiding portion 406 is in threaded connection with the flow guiding valve body 1, an external thread is arranged on the outer circular surface of the second flow guiding portion 406, the fourth liquid passing hole 402 is a through hole which is arranged on the second flow guiding portion 406 in a penetrating mode along the thickness direction of the second flow guiding portion 406, the thickness direction of the second flow guiding portion 406 is also the axial direction of the second flow guiding portion 406, the outer diameter of the first flow guiding portion 404 is smaller than that of the second flow guiding portion 406, and the outer diameter of the connecting portion 405 is smaller than that of the first flow guiding portion 404.

As shown in fig. 1, 7 and 8, an included angle is formed between the axis of the fifth liquid passing hole 501 and the axis of the diversion spring seat 5, and the included angle is an acute angle, that is, the fifth liquid passing hole 501 adopts an inclined hole design, so that the liquid flows out more smoothly, the resistance loss is less, and the processing is easy. All the fifth liquid passing holes 501 are uniformly distributed on the guide spring seat 5 along the circumferential direction with the axis of the guide spring seat 5 as the center line. One sixth liquid passing hole 502 is formed, the sixth liquid passing hole 502 is formed in the center of the guide spring seat 5, and the sixth liquid passing hole 502 is communicated with all the fifth liquid passing holes 501. The guide valve housing 9 is a hollow cylindrical member with two open ends, and the fifth liquid passing hole 501 and the sixth liquid passing hole 502 are communicated with the inner cavity of the guide valve housing 9. The fifth liquid passing hole 501 is formed in an end surface of the flow guide spring seat 5 facing the flow guide nut 4, the sixth liquid passing hole 502 is formed in an end surface of the flow guide spring seat 5 facing the flow guide pressure regulating screw 7, and the fifth liquid passing hole 501 receives the emulsion from the fourth liquid passing hole 402 and guides the emulsion to the sixth liquid passing hole 502. The fifth liquid passing hole 501 is provided with a first end and a second end, the first end and the second end are two opposite ends of the fifth liquid passing hole 501 in the axial direction, the vertical distance between the first end of the fifth liquid passing hole 501 and the flow guide pressure regulating screw 7 is larger than that between the second end and the flow guide pressure regulating screw 7, the vertical distance between the first end of the fifth liquid passing hole 501 and the axis of the flow guide spring seat 5 is larger than that between the second end and the axis of the flow guide spring seat 5, so that emulsion can be conveniently received, and the emulsion can smoothly flow. Moreover, the number of the fourth liquid passing holes 402 is greater than that of the fifth liquid passing holes 501.

As shown in fig. 1, 7 and 8, the guide spring seat 5 is a guide spring seat 5 which is formed by a guide section 504, a first boss 503 and a third boss 505, the guide section 504 is a circular block-shaped structure, and the first boss 503 and the third boss 505 are respectively connected with the guide section 504 at one side of the guide section 504 to form an integral structure. The first projection 503 and the third projection 505 are coaxial with the guide section 504, the first projection 503 is cylindrical, and the diameter of the guide section 504 is larger than the diameter of the first projection 503 and the third projection 505. The diversion spring seat 5 is provided with a first contact surface which is contacted with the end surface of the valve core 2, and the end surface of the valve core 2 and the first contact surface are planes which are vertical to the axis of the valve core 2. The third boss 505 is spherical, and the first contact surface is an outer surface of the third boss 505, and the first contact surface is perpendicular to an axis of the third boss 505. The water conservancy diversion spring holder 5 is owing to press from both sides between reset spring 6 and case 2, case 2 and reset spring 6 all exert along axial effort to water conservancy diversion spring holder 5, water conservancy diversion spring holder 5 is through the first contact surface that sets up on the third boss 505 and the terminal surface contact of case 2, form the plane contact, form stable area of contact, can ensure that water conservancy diversion spring holder 5 atress is even, make water conservancy diversion spring holder 5 only receive the axial force, do not receive radial interference, prevent to receive radial force to lead to reset spring 6 card to die or bending deformation, the reliability is improved. The fifth liquid passing hole 501 extends from the end surface of the guide section 504 facing the guide valve body 1 to the inside of the guide section 504, and extends to the inside of the first boss 503, the sixth liquid passing hole 502 is a circular hole provided at the center of the inside of the first boss 503, and the sixth liquid passing hole 502 forms an opening on the end surface of the first boss 503 facing the guide pressure regulating screw 7.

As shown in fig. 1 and 9, the diversion pressure regulating screw 7 is located in the inner cavity of the diversion valve housing 9, and the diversion pressure regulating screw 7 and the liquid return connector 8 are located at the same end of the diversion valve housing 9. The diversion pressure regulating screw 7 is composed of a pressure regulating screw body 702 and a second boss 703, the pressure regulating screw body 702 is a circular block structure, the second boss 703 is fixedly connected with the pressure regulating screw body 702 at the center of the pressure regulating screw body 702, and the second boss 703 extends out towards the outer side of the pressure regulating screw body 702. The second boss 703 is a circular block structure, the outer diameter of the second boss 703 is smaller than the outer diameter of the pressure regulating screw body 702, and the second boss 703 and the pressure regulating screw body 702 are coaxially arranged. The pressure regulating screw body 702 is in threaded connection with the flow guide valve casing 9, an external thread is arranged on the outer circular surface of the pressure regulating screw body 702, and an internal thread is arranged on the inner circular surface of the flow guide valve casing 9. The return spring 6 is a coil spring and a compression spring, the first boss 503 is used for being inserted into the return spring 6 to position one end of the return spring 6, the second boss 703 is used for being inserted into the return spring 6 to position the other end of the return spring 6, and the return spring 6 is clamped between the pressure regulating screw body 702 and the guide section 504. The seventh liquid passing hole 701 is arranged at the center of the diversion pressure regulating screw 7, and the seventh liquid passing hole 701 is a through hole which penetrates through the diversion pressure regulating screw 7 in the axial direction. The seventh liquid passing hole 701 is used for allowing a tool to be inserted in the assembling and disassembling process of the diversion pressure regulating screw 7 so that the tool can screw the diversion pressure regulating screw 7 in a screwing mode, and meanwhile the seventh liquid passing hole 701 is also used for allowing emulsion to pass through after the safety valve is opened. The seventh liquid passing hole 701 is a regular hexagonal hole and is matched with a tool in shape, so that the tool is convenient to disassemble and assemble, and the structure is simplified.

As shown in fig. 1, 6, and 8, in the present embodiment, six fourth liquid passing holes 402 are provided, and four fifth liquid passing holes 501 are provided.

As shown in fig. 1, preferably, the diameter of the second liquid passing hole 301 is larger than that of the first liquid passing hole 201, the diameter of the fourth liquid passing hole 402 is larger than that of the second liquid passing hole 301, the diameter of the fifth liquid passing hole 501 is larger than that of the fourth liquid passing hole 402, the diameter of the sixth liquid passing hole 502 is larger than that of the fifth liquid passing hole 501, the diameter of the seventh liquid passing hole 701 is larger than that of the sixth liquid passing hole 502, the diameter of the liquid discharging hole 801 is larger than that of the seventh liquid passing hole 701, and the diameter of the ninth liquid passing hole 403 is larger than that of the eighth liquid passing hole 202.

As shown in fig. 1, the tail liquid outlet safety valve of the present invention further includes a first sealing assembly and a second sealing assembly disposed between the valve core 2 and the valve sleeve 3, and the second liquid passing hole 301 is located between the first sealing assembly and the second sealing assembly. The first sealing assembly comprises a first inner sealing ring 11 sleeved on the valve core 2 and a first outer sealing ring 14 sleeved on the first inner sealing ring 11, the first inner sealing ring 11 is a circular ring-shaped sealing ring, the cross section of the first inner sealing ring 11 is rectangular, the first outer sealing ring 14 is an O-shaped sealing ring, the first inner sealing ring 11 is made of a composite material, and the first outer sealing ring 14 is made of rubber. In the axial direction, the first inner seal 11 is clamped between the inner wall surface of the fluid-directing valve body 1 and the valve sleeve 3. The inner circumferential surface of the first inner sealing ring 11 is attached to the outer circumferential surface of the valve core 2, the first outer sealing ring 14 applies radial pressure to the first inner sealing ring 11 to enable the first inner sealing ring 11 to be in close contact with the valve core 2, and the outer circumferential surface of the first inner sealing ring 11 is attached to the inner circumferential surface of the first outer sealing ring 14. Because the valve core 2 is movable, a liquid passing hole is formed in the side wall of the valve core 2, when the valve core 2 pushes the flow guide spring seat 5 to move, emulsion simultaneously enters the first liquid passing hole 201 of the valve core 2 by arranging a first sealing assembly composed of a first inner sealing ring 11 and a first outer sealing ring 14 which are matched with each other between the valve core 2 and the valve sleeve 3, when the valve core 2 moves to make the first liquid passing hole 201 aligned with the first inner sealing ring 11, the emulsion can erode the inner circumferential surface of the first inner sealing ring 11 to generate pressure on the first inner sealing ring 11, so that the first inner sealing ring 11 tends to expand along the radial direction, and the first outer sealing ring 14 extrudes the first inner sealing ring 11 to avoid the expansion of the first inner sealing ring 11, so that the first inner sealing ring 11 is in closer contact with the valve core 2, and the erosion of the emulsion overflowing from the liquid passing hole of the valve core 2 to the inner circumferential surface of the first inner sealing ring 11 is reduced, thereby improving the sealing reliability and the service life of the sealing structure, and finally improving the sealing performance.

As shown in fig. 1, the second sealing assembly includes a second inner sealing ring 12 sleeved on the valve core 2 and a second outer sealing ring 15 sleeved on the second inner sealing ring 12, the second inner sealing ring 12 is a circular ring-shaped sealing ring, the cross section of the second inner sealing ring 12 is rectangular, the second outer sealing ring 15 is an O-shaped sealing ring, the second inner sealing ring 12 is made of a composite material, and the second outer sealing ring 15 is made of rubber. The inner circumferential surface of the second inner sealing ring 12 is attached to the outer circumferential surface of the valve core 2, the second outer sealing ring 15 applies radial pressure to the second inner sealing ring 12 to enable the second inner sealing ring 12 to be in close contact with the valve core 2, and the outer circumferential surface of the second inner sealing ring 12 is attached to the inner circumferential surface of the second outer sealing ring 15.

As shown in fig. 1, the tail liquid outlet safety valve of the present invention further includes a spacer ring 10 disposed between the valve core 2 and the valve sleeve 3 and a third sealing assembly disposed between the diversion thread insert 4 and the valve core 2, wherein the spacer ring 10 is disposed between the second sealing assembly and the third sealing assembly. The spacer ring 10 is of a circular ring structure, the spacer ring 10 is sleeved on the valve core 2, the inner circular surface of the spacer ring 10 is attached to the outer circular surface of the valve core 2, in the axial direction, the spacer ring 10 is clamped between the second sealing assembly and the third sealing assembly, the third sealing assembly is clamped between the spacer ring 10 and the connecting portion 405, the spacer ring 10 is located in the inner cavity of the valve sleeve 3, and the spacer ring 10, the valve sleeve 3 and the valve core 2 are coaxially arranged. The third sealing assembly comprises a third inner sealing ring 13 sleeved on the valve core 2 and a third outer sealing ring 16 sleeved on the third inner sealing ring 13.

The third inner seal ring 13 is a circular ring-shaped seal ring, the cross section of the third inner seal ring 13 is rectangular, the third outer seal ring 16 is an O-shaped seal ring, the third inner seal ring 13 is made of a composite material, and the third outer seal ring 16 is made of rubber. The inner circumferential surface of the third inner sealing ring 13 is attached to the outer circumferential surface of the valve core 2, the third outer sealing ring 16 applies radial pressure to the third inner sealing ring 13 to enable the third inner sealing ring 13 to be in close contact with the valve core 2, and the outer circumferential surface of the third inner sealing ring 13 is attached to the inner circumferential surface of the third outer sealing ring 16. Because the valve core 2 is movable, the side wall of the valve core 2 is provided with the eighth liquid passing hole 202, the third sealing assembly formed by the third inner sealing ring 13 and the third outer sealing ring 16 which are matched is arranged between the valve core 2 and the valve sleeve 3, when the guide spring seat 5 is pushed by the valve core 2 to move, the emulsion simultaneously enters the eighth liquid passing hole 202 of the valve core 2, when the eighth liquid passing hole 202 is aligned with the third inner sealing ring 13 due to the movement of the valve core 2, the emulsion can erode the inner circumferential surface of the third inner sealing ring 13 to generate pressure on the third inner sealing ring 13, so that the third inner sealing ring 13 has a tendency of expanding along the radial direction, and the third outer sealing ring 16 extrudes the third inner sealing ring 13 to avoid the expansion of the third inner sealing ring 13, so that the third inner sealing ring 13 is in closer contact with the valve core 2, and the erosion of the emulsion overflowing from the liquid passing hole of the valve core 2 to the inner circumferential surface of the third inner sealing ring 13 is weakened, thereby improving the sealing reliability and the service life of the sealing structure, and finally improving the sealing performance. The spacer ring 10 is clamped between the second inner seal ring 12 and the third inner seal ring 13, the spacer ring 10 is made of metal, the spacer ring 10 is used for limiting the second inner seal ring 12 and the third inner seal ring 13 in the axial direction, and in the process that the valve core 2 moves in the axial direction, the spacer ring 10 is used for preventing the second inner seal ring 12 and the third inner seal ring 13 from deforming in the axial direction.

Therefore, by arranging the first sealing assembly, the second sealing assembly and the third sealing unit, the sealing performance of the safety valve can be further improved, and the sealing effect is improved.

When the safety valve needs to be closed, the reset mechanism pushes the valve core 2 to move towards the inside of the diversion valve body 1 until the first liquid passing hole 201 is disconnected from the second liquid passing hole 301, and the eighth liquid passing hole 202 is disconnected from the ninth liquid passing hole 403, at this time, the first sealing assembly is located between the first liquid passing hole 201 and the second liquid passing hole 301, the third sealing assembly is located between the eighth liquid passing hole 202 and the ninth liquid passing hole 403, the eighth liquid passing hole 202 is also located between the second sealing assembly and the third sealing assembly, the second liquid passing hole 301 is located between the first sealing assembly and the second sealing assembly, the eighth liquid passing hole 202 is aligned with the spacer ring 10, and the eighth liquid passing hole 202 and the spacer ring 10 are located at the same axial position, so that the safety valve is closed.

The utility model discloses a length of afterbody play liquid relief valve is 186mm, and the maximum diameter is 42mm, and its nominal flow is greater than 500L/min, and the opening pressure of relief valve is 50MPa. The diameter is less, and length is longer, has solved the support balance jack and has reserved the problem that connect the relief valve space little, conveniently arranges on hydraulic support.

The invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-described manner. Various insubstantial improvements are made by adopting the method conception and the technical proposal of the utility model; or without improvement, the above conception and technical scheme of the utility model can be directly applied to other occasions, all within the protection scope of the utility model.

Claims (3)

1. Afterbody goes out liquid relief valve, including water conservancy diversion valve casing, reset spring, water conservancy diversion spring holder and water conservancy diversion pressure regulating screw, reset spring is located between water conservancy diversion spring holder and the water conservancy diversion pressure regulating screw, and the water conservancy diversion spring holder includes the guide section and sets up the first boss on the guide section, its characterized in that: the water conservancy diversion pressure regulating screw include with the water conservancy diversion valve casing is threaded connection's pressure regulating screw body and sets up the second boss on the pressure regulating screw body, reset spring's an pot head is located on first boss, and reset spring's another pot head is located on the second boss.

2. The tail drain relief valve of claim 1, wherein: the second boss is of a circular block structure.

3. The tail drain relief valve of claim 1, wherein: the guide spring seat further comprises a third boss arranged on the guide section, the first boss and the third boss respectively extend out towards two opposite sides of the guide section, and the third boss is spherical.

Images