High-flow high-pressure circulation mechanism of safety valve

Abstract

The utility model discloses a large-flow high-pressure circulation mechanism of a safety valve, which relates to the technical field of safety valves and comprises a valve seat, a valve cover, an adjusting seat and a valve clack, the valve clack is arranged on the inner side of the upper end of the valve seat, a plurality of guide holes distributed circumferentially are arranged at the lower end of the valve clack, an annular groove is arranged on the upper side of the outer end of the valve clack, and the guide holes are communicated with the annular groove. A filter screen body is detachably installed on the inner wall of the guide hole, the lower end of the filter screen body and the lower end of the valve clack are located on the same plane, a medium inlet hole is formed in the lower end of the valve seat, and the inner end of the medium inlet hole communicates with a plurality of positioning holes and locking holes which are formed in the valve seat and distributed circumferentially. According to the utility model, crystals and impurities in a medium can be filtered through the filter screen body and the filter screen synchronous cleaning mechanism, and crystals and impurities can be synchronously cleaned on the lower surface of the filter screen body, so that the normal function of the valve body is ensured, the phenomenon that the opening effect of the valve clack becomes poor is avoided, and the service life of the valve body is prolonged. And the safety of the valve body is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a safety valve technical field, concretely is a high pressure flow circulation mechanism of big flow of safety valve. BACKGROUND

[0002] Safety valve is a kind of key safety device for protecting pressure vessel, pipeline system and other pressure-bearing equipment from overpressure hazards. Its core function is to automatically open when the system pressure exceeds the preset value, release excess medium to reduce pressure, prevent equipment from explosion, leakage or structural damage due to overpressure, so as to protect personnel, equipment and environment safety;Safety valve is usually composed of valve body, valve seat, valve clapper (valve core), spring (or weight, pilot valve and other driving mechanisms), adjusting ring, sealing element and discharge pipeline. Its design needs to meet the requirements of sealing, sensitivity and discharge capacity.

[0003] In the prior art, the medium flowing through the safety valve may produce crystallization or the impurities in the medium may block the guide hole of the valve clapper during the flow process, which may cause the medium to be unable to effectively enter the guide hole and form high pressure, and finally result in poor opening effect of the valve clapper, reducing the safety of the safety valve. Therefore, we propose a high pressure flow circulation mechanism of big flow of safety valve. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a high pressure flow circulation mechanism of big flow of safety valve to solve the problems in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a high pressure flow circulation mechanism of big flow of safety valve, comprising a valve seat, a valve cover, an adjusting seat and a valve clapper, the valve seat is provided with a valve clapper on the inner side of the upper end, a plurality of circumferentially distributed guide holes are formed in the lower end of the valve clapper, a ring groove is formed in the outer end of the valve clapper, the guide holes are communicated with the ring groove, a filter screen body is detachably installed on the inner wall of the guide hole, the lower end of the filter screen body is in the same plane with the lower end of the valve clapper, a medium inlet hole is formed in the lower end of the valve seat, a plurality of circumferentially distributed positioning holes and locking holes are formed in the valve seat, the locking holes are arranged on the inner side of the positioning holes, a filter screen synchronous cleaning mechanism is arranged in the inner end of the valve seat, the filter screen synchronous cleaning mechanism is used for intermittently cleaning the medium crystallization attached to the lower end of the filter screen body, and the filter screen body is used for blocking and filtering the medium crystallization.

[0006] Preferably, the filter screen synchronous cleaning mechanism comprises a fixed ring arranged inside the medium inlet hole, a plurality of circumferentially distributed locking bolts are threadedly connected to the surface of the fixed ring, outer ends of the locking bolts are threadedly connected to locking holes, a contact frame is fixedly installed on the inner wall of the fixed ring, a follow-up shaft is arranged to penetrate through the middle part of the surface of the contact frame, and the outer end of the follow-up shaft is rotatably connected to the contact frame through a bearing.

[0007] Preferably, a plurality of positioning columns are fixedly installed on the upper end of the fixed ring, the positioning columns are arranged outside the locking bolts, each positioning column corresponds to a positioning hole, and the outer end of each positioning column is slidably connected to the positioning hole.

[0008] Preferably, the upper end of the valve flap abuts against a spring, and the end of the spring away from the valve flap abuts against an adjusting seat.

[0009] Preferably, the upper end of the adjusting seat is provided with a rotating screw rod in the middle part, the outer end of the rotating screw rod is provided with a threaded groove, and the upper end of the rotating screw rod is fixedly installed with a rotating nut.

[0010] Preferably, a plurality of circumferentially distributed pressure relief holes are arranged on the outer end of the valve cover.

[0011] Preferably, the rotating screw rod penetrates through the valve cover, and the outer end of the rotating screw rod is threadedly connected to the valve cover.

[0012] Compared with the prior art, the filter screen synchronous cleaning mechanism has the following beneficial effects:

[0013] 1. The filter screen body and the filter screen synchronous cleaning mechanism can complete the filtering action of the crystals in the medium and the impurities in the medium, and can complete the synchronous cleaning action of the crystals and the impurities on the lower surface of the filter screen body, thereby ensuring the normal function of the valve body and preventing the opening effect of the valve flap from being poor, and improving the safety of the valve body.

[0014] 2. The positioning hole, the locking hole, the positioning column and the locking bolt can complete the stable installation action of the filter screen synchronous cleaning mechanism and the valve seat, the positioning hole and the positioning column can directly position the fixed ring, and the installation efficiency of the filter screen synchronous cleaning mechanism is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a whole structure schematic view of the utility model;

[0016] Figure 2 It is a whole cross section structure schematic view of the utility model;

[0017] Figure 3 For the utility model Figure 2 The structure of A part in the middle is enlarged;

[0018] Figure 4 For the utility model filter screen synchronous cleaning mechanism structure schematic view;

[0019] Figure 5 For the utility model valve seat and valve cover cross section structure schematic view.

[0020] In the drawing: 1, valve seat; 2, valve cover; 3, pressure relief hole; 4, adjusting seat; 5, rotating screw; 6, rotating nut; 7, valve flap; 8, spring; 9, filter screen synchronous cleaning mechanism; 91, positioning column; 92, fixed ring; 93, locking bolt; 94, contact frame; 95, follow-up shaft; 96, rotating blade; 97, rotating rod; 98, cleaning arc plate; 10, locking hole; 11, positioning hole; 12, guide hole; 13, ring groove; 14, filter screen body; 15, medium inlet hole. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0022] Please refer to Figures 1-5 The utility model provides a kind of technical scheme: the flow-through mechanism of large flow high pressure of safety valve, including valve seat 1, valve cover 2, adjusting seat 4 and valve flap 7, valve seat 1 upper end inner side is provided with valve flap 7, valve flap 7 lower end is provided with multiple circumferentially distributed guide holes 12, valve flap 7 outer end upper side is provided with ring groove 13, guide hole 12 is communicated with ring groove 13, filter screen body 14 is detachably installed in guide hole 12 inner wall, filter screen body 14 lower end is in the same plane with valve flap 7 lower end, valve seat 1 lower end is provided with medium inlet hole 15, medium inlet hole 15 inner end is communicated with multiple circumferentially distributed positioning hole 11 and locking hole 10 provided in valve seat 1 upper end, locking hole 10 is provided in the inner side of positioning hole 11, valve seat 1 inner end is provided with filter screen synchronous cleaning mechanism 9, filter screen synchronous cleaning mechanism 9 is used to intermittently clean the medium crystallization adhered to the lower end of filter screen body 14, filter screen body 14 is used to carry out blocking filter action to medium crystallization.

[0023] In the embodiment, the filter screen synchronous cleaning mechanism 9 comprises a fixed ring 92, the fixed ring 92 is arranged on the inner side of the medium inlet hole 15, a plurality of locking bolts 93 are screw-connected on the surface of the fixed ring 92 in a circumferential distribution, the outer end of the locking bolt 93 is screw-connected with the locking hole 10, a contact frame 94 is fixedly installed on the inner wall of the fixed ring 92, a follow-up shaft 95 is arranged on the surface of the contact frame 94 in a penetrating mode, and the outer end of the follow-up shaft 95 is rotatably connected with the contact frame 94 through a bearing; a plurality of rotating blades 96 are fixedly installed on the lower end of the follow-up shaft 95 in a circumferential distribution; a plurality of rotating rods 97 are fixedly installed on the upper end of the follow-up shaft 95 in a circumferential distribution; a cleaning arc plate 98 is fixedly installed on the outer end of each rotating rod 97; and the upper end of the cleaning arc plate 98 is slidably connected with the valve clack 7.

[0024] Specifically, in the working process of the valve body, the medium enters the medium inlet hole 15 at this time, the rotating blade 96 is driven to rotate by the medium at this time, the follow-up shaft 95 is driven to rotate by the rotating blade 96 at this time, the rotating rod 97 and the cleaning arc plate 98 are driven to rotate by the follow-up shaft 95 at this time, the medium crystals and impurities on the lower end of the filter screen body 14 are scraped and cleaned by the cleaning arc plate 98 at this time, and the crystals and impurities are cleaned; when the pressure of the medium on the valve clack 7 increases, the rotating nut 6 can be rotated at this time, the rotating nut 6 drives the rotating screw 5 to rotate and drives the adjusting seat 4 to move downwards at this time, the adjusting seat 4 compresses the spring 8 at this time, the spring force of the spring 8 on the valve clack 7 increases at this time, the pressure of the medium on the valve clack 7 increases at this time, the medium pushes the valve clack 7 upwards at this time, the valve clack 7 compresses the spring 8 at this time, and the medium in the guide hole 12 and the annular groove 13 flows out of the pressure relief hole 3 at this time.

[0025] In the embodiment, a plurality of positioning columns 91 are fixedly installed on the upper end of the fixed ring 92 in a circumferential distribution, the positioning columns 91 are arranged on the outer side of the locking bolt 93, each positioning column 91 corresponds to the positioning hole 11, and the outer end of the positioning column 91 is slidably connected with the positioning hole 11.

[0026] Specifically, the positioning hole 11, the locking hole 10, the positioning column 91 and the locking bolt 93 can be used for stably installing the filter screen synchronous cleaning mechanism 9 and the valve seat 1, the positioning hole 11 and the positioning column 91 can be used for directly positioning the fixed ring 92, and the installation efficiency of the filter screen synchronous cleaning mechanism 9 is improved.

[0027] In the embodiment, the upper end of the valve clack 7 is abutted with the spring 8, and the end, away from the valve clack 7, of the spring 8 is abutted with the adjusting seat 4.

[0028] Specifically, the spring 8 and the adjusting seat 4 can be used for adjusting the pressure borne by the valve clack 7.

[0029] In the embodiment, the middle part of the upper end of the adjusting seat 4 is in abutment with the rotating screw 5, the outer end of the rotating screw 5 is provided with a threaded groove, and the upper end of the rotating screw 5 is fixedly installed with the rotating nut 6.

[0030] Specifically, the rotating nut 6 drives the rotating screw 5 to rotate by rotating the rotating nut 6.

[0031] In the embodiment, the outer end of the valve cover 2 is provided with a plurality of circumferentially distributed pressure relief holes 3.

[0032] Specifically, the pressure relief holes 3 can be used to complete the outflow of the medium.

[0033] In the embodiment, the rotating screw 5 penetrates through the valve cover 2, and the outer end of the rotating screw 5 is threadedly connected with the valve cover 2.

[0034] Specifically, it is ensured that the rotating screw 5 does not interfere with the valve cover 2 during rotation.

[0035] Working principle: during the working process of the valve body, the medium enters from the medium inlet hole 15, and drives the rotating blade 96 to rotate, and the rotating blade 96 drives the follower shaft 95 to rotate, and the follower shaft 95 drives the rotating rod 97 and the cleaning arc plate 98 to rotate, and the cleaning arc plate 98 scrapes and cleans the medium crystals and impurities on the lower end of the filter screen body 14, and the crystals and impurities are cleaned, and when the pressure of the medium on the valve disc 7 increases, the rotating nut 6 is rotated, the rotating nut 6 drives the rotating screw 5 to rotate, and the adjusting seat 4 moves downward, the spring 8 is compressed, the spring 8 increases the elastic force of the valve disc 7, the valve disc 7 resists the increase of the pressure of the medium, and when the pressure is too large, the medium pushes the valve disc 7 upward, the valve disc 7 compresses the spring 8, and the medium in the guide hole 12 and the annular groove 13 flows out from the pressure relief hole 3.

[0036] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A large flow high pressure flow passage mechanism of a safety valve comprising a valve seat (1), a valve cover (2), an adjusting seat (4) and a valve disc (7), characterized in that: The upper end of the valve seat (1) is provided with a valve clack (7), a plurality of circumferentially distributed guide holes (12) are formed in the lower end of the valve clack (7), a ring groove (13) is formed in the outer end of the valve clack (7), the guide holes (12) are communicated with the ring groove (13), a filter screen body (14) is detachably installed on the inner wall of the guide hole (12), the lower end of the filter screen body (14) is in the same plane as the lower end of the valve clack (7), a medium inlet hole (15) is formed in the lower end of the valve seat (1), a plurality of circumferentially distributed positioning holes (11) and locking holes (10) are formed in the upper end of the valve seat (1) and are communicated with the inner end of the medium inlet hole (15), the locking holes (10) are arranged inside the positioning holes (11), a filter screen synchronous cleaning mechanism (9) is arranged in the inner end of the valve seat (1), the filter screen synchronous cleaning mechanism (9) is used for intermittently cleaning the medium crystals attached to the lower end of the filter screen body (14), and the filter screen body (14) is used for blocking the filtering action of the medium crystals.

2. A large flow high pressure flow passage mechanism of a safety valve according to claim 1, characterized in that: The filter screen synchronous cleaning mechanism (9) comprises a fixing ring (92), the fixing ring (92) is arranged inside the medium inlet hole (15), a plurality of circumferentially distributed locking bolts (93) are threadedly connected to the surface of the fixing ring (92), the outer ends of the locking bolts (93) are threadedly connected with the locking holes (10), a contact frame (94) is fixedly installed on the inner wall of the fixing ring (92), a follow-up shaft (95) is arranged to penetrate the surface of the contact frame (94) and the outer end of the follow-up shaft (95) is rotatably connected with the contact frame (94) through a bearing, a plurality of circumferentially distributed rotating blades (96) are fixedly installed on the lower end of the follow-up shaft (95), a plurality of circumferentially distributed rotating rods (97) are fixedly installed on the upper end of the follow-up shaft (95), a cleaning arc plate (98) is fixedly installed on the outer end of each rotating rod (97), and the upper end of the cleaning arc plate (98) is slidably connected with the valve clack (7).

3. A large flow high pressure flow passage mechanism of a safety valve according to claim 2, characterized in that: A plurality of circumferentially distributed positioning columns (91) are fixedly installed on the upper end of the fixing ring (92), the positioning columns (91) are arranged outside the locking bolts (93), and each positioning column (91) corresponds to a positioning hole (11).

4. The large flow high pressure flow passage mechanism of a safety valve according to claim 1, characterized by: The upper end of the valve clack (7) abuts against a spring (8), and the end of the spring (8) away from the valve clack (7) abuts against an adjusting seat (4).

5. A high flow, high pressure flow passage mechanism for a safety valve according to claim 4, wherein: The upper end of the adjusting seat (4) abuts against a rotating screw rod (5), a threaded groove is formed in the outer end of the rotating screw rod (5), and a rotating nut (6) is fixedly installed on the upper end of the rotating screw rod (5).

6. A large flow high pressure flow passage mechanism of a safety valve according to claim 1, characterized in that: A plurality of circumferentially distributed pressure relief holes (3) are formed in the outer end of the valve cover (2).

7. A high flow, high pressure flow passage mechanism for a safety valve according to claim 5, wherein: The rotating screw rod (5) penetrates the valve cover (2), and the outer end of the rotating screw rod (5) is threadedly connected with the valve cover (2).

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