Axial-flow check valve locking device

Abstract

The utility model belongs to the technical field of valves, and particularly relates to an axial-flow type check valve anti-loosening device which comprises a valve body, an axial-flow type check valve and an axial-flow type check valve. The valve clack is arranged in the valve body; the guide rod is arranged on the valve clack, the guide rod is sleeved with a spring set, and a guide key is arranged at the end of the guide rod; the flow guide cover is arranged in the valve body; the four-piece ring is arranged in the valve body and is connected with the flow guide cover through a connecting bolt; the fastening piece is arranged on the four-piece ring, and the fastening piece can prevent the connecting bolt from loosening through friction of a crossed thread pair; compared with the prior art, the axial-flow type check valve has the advantages that the problem that a connecting bolt for connecting two mutually moving parts is easy to loosen is solved through the fastening piece, and the reliability and the stability of the connecting bolt are improved, so that the use stability of the axial-flow type check valve is ensured, the service life of the axial-flow type check valve is prolonged, and the service life of the axial-flow type check valve is prolonged. The service life of the valve is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, especially relate to a axial -flow check valve anti -loose device. BACKGROUND

[0002] Axial -flow check valve is a kind of equipment for preventing medium backflow, mainly applied in pipeline system, ensure that fluid only flows in one direction, to avoid the possible damage to equipment, pipe rupture or system failure due to fluid backflow. Axial -flow check valve is characterized in that its structure design is closely related to fluid flow direction, can provide low resistance in the fluid flow process, guarantee the high efficiency of check valve, such as the patent disclosed in a kind of high-pressure sealing type valve seat axial -flow check valve with No. CN201721910913.2, by setting sealing ring between valve seat and valve body, four open ring and support plate cooperate screw, make valve seat, sealing ring, four open ring and support plate four parts form sealing assembly;

[0003] This existing large-diameter axial -flow check valve fairing usually adopts four open ring fixed structure design, the structure is uniformly stressed, relatively stable, but four open ring and fairing adopt bolt connection, two parts will be disturbed frequently due to medium flow, leading to the movement of connecting bolt relative to two parts loose and fall off, greatly reduce the use stability of axial -flow check valve, thus it is necessary to make improvement. CONTENT OF UTILITY MODEL

[0004] The utility model aims at the above-mentioned technical problem, provide a kind of axial -flow check valve anti -loose device to improve the use stability of axial -flow check valve.

[0005] Therefore, the utility model provides a kind of axial -flow check valve anti -loose device, including:

[0006] Valve body, flow passage is provided in the valve body;

[0007] Valve clack, the valve clack is arranged in valve body;

[0008] Guide rod, the guide rod is arranged on valve clack, spring group is sleeved on the guide rod, and the end of the guide rod is provided with guide key;

[0009] Fairing, the fairing is arranged in valve body;

[0010] Four open ring, the four open ring is arranged in valve body and is connected with fairing by connecting bolt;

[0011] Further including:

[0012] Tightening member, the tightening member is arranged on four open ring, the tightening member can be prevented connecting bolt loose by cross thread pair friction;

[0013] The end of the guide rod is connected with the fairing through a guide key.

[0014] In the technical solution, the cross-thread friction of the cross screw pair on the four-split ring is used to prevent the bolt from loosening, and the fastening member is directly installed on the four-split ring, so that the fastening member is relatively stationary and is not prone to loosening due to medium disturbance.

[0015] In the technical solution, the cross-thread friction of the cross screw pair on the four-split ring is used to prevent the bolt from loosening, and the fastening member is directly installed on the four-split ring, so that the fastening member is relatively stationary and is not prone to loosening due to medium disturbance.

[0016] The radial screw hole is arranged on the circumferential inner wall of the four-split ring.

[0017] The fastening screw is arranged in the radial screw hole and threadedly matched with the radial screw hole.

[0018] The axial direction of the fastening screw is perpendicular to the axial direction of the connecting bolt and is distributed in a cross shape, and the cross-thread pair of the fastening screw is in frictional contact with the cross-thread pair of the connecting bolt.

[0019] In the technical solution, the connecting bolt has a plurality of connecting bolts and is uniformly and spacedly distributed along the circumference of the four-split ring, and the fastening screw has a plurality of fastening screws corresponding to the plurality of connecting bolts.

[0020] In the technical solution, the cross-thread friction of the cross screw pair on the four-split ring is used to prevent the bolt from loosening, and the fastening member is directly installed on the four-split ring, so that the fastening member is relatively stationary and is not prone to loosening due to medium disturbance.

[0021] The sliding groove is arranged at the bottom end of the fastening screw and is coaxially distributed with the fastening screw, and the extrusion block is slidingly arranged in the sliding groove.

[0022] The radial groove is arranged at the bottom of the fastening screw and penetrates through the fastening screw along the radial direction of the fastening screw, and the radial groove is in communication with the sliding groove.

[0023] The movable rod has two movable rods and is radially and symmetrically distributed, the movable rod is slidingly arranged in the radial groove, and one end of the movable rod is located in the sliding groove and is provided with a pushing inclined surface.

[0024] The top end of the extrusion block is conical.

[0025] In the technical solution, the cross-thread friction of the cross screw pair on the four-split ring is used to prevent the bolt from loosening, and the fastening member is directly installed on the four-split ring, so that the fastening member is relatively stationary and is not prone to loosening due to medium disturbance.

[0026] The anti-loosening section is arranged on the top of the locking screw, and the surface of the anti-loosening section is provided with a plurality of limiting grooves which are uniformly distributed along the circumference of the locking screw and whose length direction is parallel to the axial direction of the locking screw.

[0027] The fixing plate is sleeved on the anti-loosening section, and the fixing plate is annular and is provided with limiting blocks matched with the limiting grooves on the circumferential inner wall of the fixing plate.

[0028] The utility model discloses the beneficial effects are:

[0029] 1. The setting of the fastener solves the problem that the connecting bolt of connecting two mutual movement parts is easy to loosen, improves the reliability and stability of the connecting bolt, thereby guaranteeing the use stability of the axial flow check valve, and prolonging the service life of the valve.

[0030] 2. The setting of the extruding block and the movable rod improves the installation stability of the locking screw and prevents the locking screw from loosening to cause the failure of the anti-loosening device.

[0031] 3. The setting of the anti-loosening section and the fixing plate further improves the installation stability of the locking screw and prevents the locking screw from loosening to cause the failure of the anti-loosening device. DRAWINGS

[0032] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying the creative labor.

[0033] Figure 1 It is the structure schematic drawing of the specific embodiment of the utility model.

[0034] Figure 2 It is the structure schematic drawing of the valve body of the utility model.

[0035] Figure 3 It is the structure schematic drawing of the four open loop of the utility model.

[0036] Figure 4 It is the structure schematic drawing of the locking screw of the utility model.

[0037] Figure 5 It is the structure schematic drawing of the embodiment 3 of the utility model.

[0038] The marks in the drawing represent:

[0039] 1, valve body; 100, flow channel; 2, valve disc; 3, guide rod; 4, spring group; 5, guide key; 6, flow guide cover; 7, four open ring; 8, connecting bolt; 9, fastening part; 90, radial screw hole; 91, fastening screw; 10, sliding groove; 11, extrusion block; 12, radial groove; 13, movable rod; 14, anti-loosening section; 15, limiting groove; 16, fixed plate; 17, limiting block; 18, fixed hole. DETAILED DESCRIPTION

[0040] 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. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] In the description of the present application, it should be noted that the terms used herein are only for describing the specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For the convenience of description, the sizes of the parts shown in the drawings are not drawn in proportion. The technology, method and equipment known to those skilled in the art can not be discussed in detail, but should be considered as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as only exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0042] Embodiment 1:

[0043] The embodiment of the present application provides a anti-loosening device of axial flow check valve, including: valve body 1, flow channel 100 is arranged in valve body 1;Valve disc 2, valve disc 2 is arranged in valve body 1;Guide rod 3, guide rod 3 is arranged on valve disc 2, spring group 4 is sleeved on guide rod 3, and the end of guide rod 3 is provided with guide key 5;Flow guide cover 6, flow guide cover 6 is arranged in valve body 1;Four open ring 7, four open ring 7 is arranged in valve body 1 and is connected with flow guide cover 6 through connecting bolt 8;

[0044] Further comprising: fastening part 9, fastening part 9 is arranged on four open ring 7, and fastening part 9 can be prevented from loosening connecting bolt 8 by cross thread pair friction;

[0045] Wherein, the end of guide rod 3 is connected with flow guide cover 6 through guide key 5.

[0046] Moreover, the valve body 1, the valve disc 2, the guide rod 3, the flow guide cover 6 and the four open ring 7 are all conventional structures, and will not be described here.

[0047] In the embodiment, the cross threaded pair friction on the four open ring 7 is used to prevent the bolt loosening by the setting of the fastening member 9, and the fastening member 9 is directly installed on the four open ring 7, so it is relatively stationary and not easy to be loosened by the medium disturbance. Compared with the prior art, the utility model solves the problem that the connecting bolt 8 connecting two mutually moving parts is easy to loosen by the fastening member 9, improves the reliability and stability of the connecting bolt 8, thereby ensuring the use stability of the axial flow check valve and prolonging the service life of the valve.

[0048] Embodiment 2

[0049] The embodiment provides an anti-loosening device for an axial flow check valve, in addition to the technical scheme of the above embodiment, further having the following technical features, the fastening member 9 further comprises: a radial screw hole 90, the radial screw hole 90 is arranged on the circumferential inner wall of the four open ring 7; a fastening screw 91, the fastening screw 91 is arranged in the radial screw hole 90 and is in threaded cooperation with the radial screw hole 90.

[0050] The axial direction of the fastening screw 91 and the axial direction of the connecting bolt 8 are perpendicular to each other and are distributed in a cross shape, and the threaded pair of the fastening screw 91 is in frictional contact with the threaded pair of the connecting bolt 8.

[0051] The connecting bolt 8 has a plurality of connecting bolts 8 and is uniformly distributed along the circumferential direction of the four open ring 7, and the fastening screw has a plurality of fastening screws corresponding to the plurality of connecting bolts 8.

[0052] Moreover, the radial screw hole 90 and the screw hole for mounting the connecting bolt 8 on the four open ring 7 are distributed in a cross shape on different planes, and part of the radial screw hole 90 is in communication with the screw hole for mounting the connecting bolt 8 on the four open ring 7.

[0053] In the embodiment, after the connecting bolt 8 is fixed, the fastening screw 91 is screwed into the screw hole, and after the fastening screw is screwed into the radial screw hole 90, the threaded pair of the fastening screw 91 is in frictional contact with the threaded pair of the connecting bolt 8, thereby preventing the bolt from loosening by using the cross threaded pair friction on the four open ring 7. And because the fastening screw 91 is directly installed on the four open ring 7, it is relatively stationary and not easy to be loosened by the medium disturbance. Compared with the prior art, the utility model solves the problem that the connecting bolt 8 connecting two mutually moving parts is easy to loosen by the fastening member 9, improves the reliability and stability of the connecting bolt 8, thereby ensuring the use stability of the axial flow check valve and prolonging the service life of the valve.

[0054] Embodiment 3

[0055] The embodiment provides an anti-loosening device for an axial flow check valve.

[0056] The top end of the extrusion block 11 is conical.

[0057] Moreover, the inner walls of the sliding groove 10 and the radial groove 12 are provided with conventional guide grooves, and the side walls of the extrusion block 11 and the movable rod 13 are provided with conventional guide blocks matched with the guide grooves.

[0058] In the embodiment, when the extrusion block 11 contacts the bottom of the radial screw hole 90 during the process of screwing the tight screw 91 into the radial screw hole 90, the extrusion block 11 is extruded into the sliding groove 10 as the tight screw 91 continues to be screwed, then the top of the extrusion block 11 pushes the one end of the movable rod 13 with the pushing slope, the movable rod 13 moves to the outside of the radial groove 12 under the pushing of the extrusion block 11, and finally the outer end of the movable rod 13 is extruded out of the radial groove 12 and abuts against the inner wall of the radial screw hole 90, so that the frictional force generated by the contact prevents the tight screw 91 from loosening, improves the installation stability of the tight screw 91, and prevents the anti-loosening device from failing due to the loosening of the tight screw 91.

[0059] Embodiment 4:

[0060] The embodiment provides an anti-loosening device for an axial flow check valve.

[0061] Moreover, the inner walls of the sliding groove 10 and the radial groove 12 are provided with conventional guide grooves, and the side walls of the extrusion block 11 and the movable rod 13 are provided with conventional guide blocks matched with the guide grooves.

[0062] In the embodiment, after the fixing screw 91 is screwed, the fixing plate 16 is fixed on the four-opening ring 7 through the fixing hole 18, so that the limiting groove 15 cooperates with the limiting block 17 to limit the rotation of the fixing screw 91, finally preventing the fixing screw 91 from loosening, improving the installation stability of the fixing screw 91, and preventing the phenomenon that the locking device is invalid due to the loosening of the fixing screw 91.

[0063] The embodiments of the application are described above in combination with the drawings, and the embodiments and features in the embodiments in the application can be combined with each other without conflict, the application is not limited to the above specific embodiments, the above specific embodiments are only illustrative but not restrictive, and those skilled in the art can make many forms under the inspiration of the application without departing from the purpose of the application and the scope protected by the claims, which all belong to the protection of the application.

Claims

1. An anti-loosening device for an axial check valve, comprising: a valve body (1) in which a flow passage (100) is arranged; a valve disc (2) arranged in the valve body (1); a guide rod (3) arranged on the valve disc (2), a spring set (4) being sleeved on the guide rod (3), and an end of the guide rod (3) being provided with a guide key (5); a flow guide cover (6) arranged in the valve body (1); a four-ring (7) arranged in the valve body (1) and connected with the flow guide cover (6) through a connecting bolt (8); characterized in that further comprising: a tightener (9) arranged on the four-ring (7), the tightener (9) being capable of being frictionally connected with the connecting bolt (8) through a cross thread pair to prevent loosening of the connecting bolt (8); wherein the end of the guide rod (3) is connected with the flow guide cover (6) through the guide key (5).

2. An anti-loosening device for an axial flow check valve according to claim 1, wherein The tightener (9) further comprises: a radial screw hole (90) arranged on a circumferential inner wall of the four-ring (7); a tightener screw (91) arranged in the radial screw hole (90) and threadedly connected with the radial screw hole (90); wherein the axial direction of the tightener screw (91) is perpendicular to the axial direction of the connecting bolt (8) and is distributed in a cross shape, and the thread pair of the tightener screw (91) is in frictional contact with the thread pair of the connecting bolt (8).

3. An anti-swing device for an axial check valve according to claim 2, characterized in that: The connecting bolt (8) has a plurality of connecting bolts (8) which are uniformly and circumferentially spaced apart on the four-ring (7), and the tightener screw (91) has a plurality of tightener screws (91) corresponding to the plurality of connecting bolts (8).

4. An anti-swing device for an axial check valve according to claim 2, wherein The tightener screw (91) further comprises: a sliding groove (10) arranged at the bottom end of the tightener screw (91) and coaxially distributed with the tightener screw (91), and an extrusion block (11) being slidingly arranged in the sliding groove (10); a radial groove (12) arranged at the bottom of the tightener screw (91) and penetrating through the tightener screw (91) along the radial direction of the tightener screw (91), the radial groove (12) being in communication with the sliding groove (10); two movable rods (13) being radially and symmetrically distributed on the tightener screw (91), the movable rods (13) being slidingly arranged in the radial groove (12), and one end of the movable rods (13) being located in the sliding groove (10) and being provided with a pushing inclined surface; wherein the top end of the extrusion block (11) is conical.

5. An anti-swing device for an axial check valve according to claim 2, wherein The tightener screw (91) further comprises: an anti-loosening section (14) arranged at the top of the tightener screw (91), the surface of the anti-loosening section (14) being provided with a plurality of limiting grooves (15), the limiting grooves (15) being uniformly and circumferentially spaced apart on the tightener screw (91), and the length direction of the limiting grooves (15) being parallel to the axial direction of the tightener screw (91). A fixed plate (16) is sleeved on the anti-loosening section (14), the fixed plate (16) is annular, and a limiting block (17) matched with the limiting groove (15) is arranged on the circumferential inner wall of the fixed plate (16); edges of the fixed plate (16) are provided with a plurality of fixed holes (18) uniformly and spacedly distributed along the circumference of the fixed plate (16).

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