阅读说明：本技术 负压排水阀 (Negative pressure drain valve ) 是由 邓永峰 汪志君 于 2021-07-29 设计创作，主要内容包括：本提供一种负压排水阀,包括筒管状的阀体,上盖、下盖分别由上套囊、下套囊密封式连接阀体上、下筒口处,阀体的筒壁上有彼此相对的第一、二孔,第一、二孔之间连接有软管,软管的上、下侧布置有上、下夹杆,上、下夹杆平行且靠近或分离时构成对软管的径向约束或约束解除,所述的阀体筒壁上有管孔连接换向阀选择连通负压源或常压,其特征在于：所述的下夹杆两端有向上延伸并与上盖固连的上拉杆,所述的上夹杆两端有向下延伸并与下盖固连的下拉杆,上夹杆的两端与上盖之间设置有驱使两者分离的弹簧和/或下夹杆的两端与下盖之间设置有驱使两者分离的弹簧。消除了可能造成泄漏的缝隙,提高了负压排水阀的关闭可靠性。(The utility model provides a negative pressure drain valve, including the tubulose valve body of a section of thick bamboo, upper cover, lower cover are respectively by last cuff, lower cuff sealed connection valve body upper and lower nozzle department, have first, two holes relative to each other on the section of thick bamboo wall of valve body, first, be connected with the hose between the two holes, upper and lower clamping bar has been arranged to the upper and lower downside of hose, and upper and lower clamping bar is parallel and constitute radial restraint or the restraint of hose when being close to or separating and remove, the valve body section of thick bamboo wall on have the tube hole to connect the switching-over valve and select intercommunication negative pressure source or ordinary pressure, its characterized in that: the two ends of the lower clamping rod are provided with upper pull rods which extend upwards and are fixedly connected with the upper cover, the two ends of the upper clamping rod are provided with lower pull rods which extend downwards and are fixedly connected with the lower cover, a spring which drives the two to separate is arranged between the two ends of the upper clamping rod and the upper cover, and/or a spring which drives the two to separate is arranged between the two ends of the lower clamping rod and the lower cover. The gap which may cause leakage is eliminated, and the closing reliability of the negative pressure drain valve is improved.)

1. The utility model provides a negative pressure drain valve, includes a tubulose valve body (10), upper cover (11), lower cover (12) are respectively by upper cuff (13), lower cuff (14) sealed connection valve body (10) upper and lower nozzle department, have relative first, two holes (15, 16) each other on the section of thick bamboo wall of valve body (10), be connected with hose (20) between first, two holes (15, 16), upper and lower clamping bar (30, 40) have been arranged to the upper and lower downside of hose (20), upper and lower clamping bar (30, 40) are parallel and constitute radial restraint or restraint removal to hose (20) when being close to or separating, valve body (10) section of thick bamboo wall on have tube hole (17) to connect the switching-over valve and select intercommunication negative pressure source or ordinary pressure, its characterized in that: the upper pull rod (41) which extends upwards and is fixedly connected with the upper cover (11) is arranged at two ends of the lower clamping rod (40), the lower pull rod (31) which extends downwards and is fixedly connected with the lower cover (12) is arranged at two ends of the upper clamping rod (30), a spring for driving the upper clamping rod and the lower clamping rod to separate is arranged between two ends of the upper clamping rod (30) and the upper cover (11), and/or a spring for driving the lower clamping rod and the lower cover (12) to separate is arranged between two ends of the lower clamping rod (40).

2. The negative pressure drain valve according to claim 1, wherein: the spring (50) is sleeved on the rod body of the upper pull rod (41), the spring (50) is a compression spring, and the upper end and the lower end of the spring are abutted against the inner top surface of the upper cover (11) and the two ends of the upper clamping rod (30).

3. A negative pressure drain valve according to claim 1 or 2, wherein: the upper pull rod (41) is connected with two ends of the lower clamping rod (40) at the lower end of the upper pull rod to form a concave rod, and the upper end of the upper pull rod (41) is connected with the upper cover (11) in a detachable sealing mode.

4. A negative pressure drain valve according to claim 1 or 2, wherein: the upper clamping rod (30) and the lower pull rod (31) extending downwards from the two ends of the upper clamping rod form an inverted concave rod frame, and the lower pull rod (31) is connected with the lower cover (12) in a detachable sealing mode.

5. The negative pressure drain valve according to claim 4, wherein: two ends of the upper clamping rod (30) are provided with holes which are penetrated through in the vertical direction and used for the upper pull rod (41) to penetrate through.

6. The negative pressure drain valve according to claim 4, wherein: the outer side of the lower pull rod (31) is matched with the inner cylinder wall of the valve body (10) to form a slide block guide groove.

7. The negative pressure drain valve according to claim 6, wherein: the lower pull rod (31) is positioned on the inner cylinder wall of the valve body (10) and is provided with a convex block or a convex strip (18) to form a guide groove, and the length direction of the guide groove is parallel to the cylinder core direction of the valve body (10).

8. The negative pressure drain valve according to claim 5, wherein: the upper part of the upper clamping rod (30) between the upper pull rods (41) is provided with concave cavities (32) which are arranged at intervals along the length direction.

9. The negative pressure drain valve according to claim 1, wherein: the upper clamping rod (30) is provided with a side protruding part connected with the adjacent part on the hose (20) and/or the lower clamping rod (40) is provided with a side protruding part connected with the adjacent part on the hose (20).

10. The negative pressure drain valve of claim 9, wherein: go up clamp lever (30) on to its side protruding hook pole (33) of stretching out and last shackle (21) hook connection on hose (20), lower clamp lever (40) on to its side protruding hook pole (42) of stretching out and lower shackle (22) hook connection on hose (20).

11. The negative pressure drain valve according to claim 3, wherein: the upper end of the upper pull rod (41) is provided with a threaded hole, the upper cover (11) corresponding to the threaded hole is provided with a threaded hole, the upper cover and the threaded hole are connected through a bolt (411), and a sealing gasket (412) is arranged at the joint.

12. The negative pressure drain valve according to claim 3, wherein: the periphery of the cover plate of the lower cover (12) is provided with an upward extending supporting leg (121), the upper end of the supporting leg (121) is provided with a support (122) protruding outwards, and the lower end of the lower pull rod (31) is connected to the support (122) through a screw (123).

13. The negative pressure drain valve according to claim 12, wherein: two supporting legs (121) are arranged at intervals of high outside and low inside and are connected with vertical plates (121a), and the two vertical plates (121a) on the opposite sides and the lower cover (12) enclose an open slot.

Technical Field

The invention relates to valves, in particular to a valve path switching method which realizes the switching on and off of a valve path by utilizing the alternate change of negative pressure and normal pressure environment.

Background

The valve which realizes the on-off of the valve path by utilizing the alternate change of the negative pressure and the normal pressure environment in the prior art has two basic structures, one is that a leather cup is arranged in a valve body, and the leather cup is driven by a driving mechanism to realize deformation so as to realize the conflict with the valve path to stop the valve path or separate from the valve path to open the valve path; the other type is that a leather hose or a hose is arranged in the valve body, the clamping mechanism is used for restraining or separating the outer wall of the hose, when the hose is restrained, the partial pipe wall of the hose is clamped to stop the passage of the hose, and when the restraint is released, the hose is expanded by dirt when the dirt passes through the hose, and the dirt can smoothly pass through the hose.

In the prior art, document 1 discloses a vacuum water discharge valve (document No. US3983080A), the valve comprising a top cone 14 and a bottom cone 15, which cones are made of an elastic material or the same kind of flexible material as the tubular valve member 5. When the valve 10 is operated to connect the enclosed chamber 4 to the pipe 2, atmospheric pressure outside the chamber 4 will act to compress the housing 3 in a vertical direction. This is a result of the support member 9 being supported on a strut 16 connected to a tip member 17 connected to the cone 14, and further because the other pair of members 9 is supported on struts 18 and 19 respectively, the struts 18 and 19 being connected to an end 20 supported by the cone member 15. The collapse of the lower conical member 15 moves the member or upper horizontal bar 9 in an upward direction and the lower horizontal bar 9 supported on the support 16 in a downward direction. While the horizontal bars 9 are normally provided in a pair on the upper side of the tubular member 5 in substantially bridging relation with the horizontal bars 9 on the lower side of the tubular member, the tubular member 5 is opened when the horizontal bars 9 on the lower side of the tubular member 5 are displaced in a vertically separated manner from the horizontal bars 9 on the upper side of the tubular member 5. Conversely, when the horizontal rod 9 on the lower side of the tubular member 5 and the horizontal rod 9 on the upper side of the tubular member 5 are displaced so as to approach each other in the vertical direction, the tubular member 5 is pinched, and the valve path is closed by being stopped.

Document 2 discloses an anti-suck-back vacuum waste valve and vacuum waste collection system (document No. CN 103438237B), which also discloses that a corresponding clamping mechanism imposes restriction on a hose 103, the hose 103 is made of soft materials such as rubber, the hose 103 is arranged in a shell 106 and is connected with an inlet 102 and an outlet 101, and waste water flows through the inlet 102, the hose 103 and the outlet 101 in sequence.

The same technical contents of documents 1 and 2 are that a spring 8 or 110 is centrally disposed, and when the valve is closed, the elastic force provided by the spring 8 is applied to the middle of the horizontal rod 9 or the elastic force provided by the spring 110 is applied to the middle of the cross rod connected to the lower end of the pressure spring seat 111 (see fig. 7 in document 2). The two ends of the flat deformed gap of the hose 103 or the tubular member 5 under the action of the clamping mechanism are the parts which are most difficult to be seamed, and the manner of applying force to the middle part of the clamping rod adopted in the documents 1 and 2 cannot ensure the seaming of the two ends, so that the serious consequence is leakage, which is a fatal defect of valve parts.

Disclosure of Invention

The invention aims to provide a negative pressure drain valve which ensures the reliability of valve path closing so as to avoid leakage.

The utility model provides a negative pressure drain valve, includes the tubulose valve body of a section of thick bamboo, upper cover, lower cover are respectively by last cuff, lower cuff sealed connection valve body upper and lower nozzle department, have first, two holes relative to each other on the section of thick bamboo wall of valve body, be connected with the hose between first, two holes, upper and lower clamping bar has been arranged to the upper and lower downside of hose, upper and lower clamping bar is parallel and constitute radial restraint or the restraint of hose when being close to or separating and relieve, the valve body section of thick bamboo wall on have the tube hole to connect the switching-over valve and select intercommunication negative pressure source or ordinary pressure, its characterized in that: the two ends of the lower clamping rod are provided with upper pull rods which extend upwards and are fixedly connected with the upper cover, the two ends of the upper clamping rod are provided with lower pull rods which extend downwards and are fixedly connected with the lower cover, a spring which drives the two to separate is arranged between the two ends of the upper clamping rod and the upper cover, and/or a spring which drives the two to separate is arranged between the two ends of the lower clamping rod and the lower cover.

According to the scheme, the springs are arranged at the two ends of the lower clamping rod and/or the upper clamping rod, so that stable displacement and reliable clamping force of the two ends of the lower clamping rod and the upper clamping rod can be ensured, reliable clamping force is applied to the two ends of a clamping seam formed when the hose is clamped flat, the gap which possibly causes leakage is eliminated, and the closing reliability of the negative pressure drain valve is improved.

Drawings

FIG. 1 is a perspective view of the present invention;

FIGS. 2 and 3 are front and left side views, respectively, of the present invention;

FIGS. 4 and 5 are sectional views A-A of FIGS. 2 and 3, respectively;

fig. 6 and 7 are schematic perspective views of the working state of the present invention.

Detailed Description

A negative pressure drainage valve comprises a tubular valve body 10, an upper cover 11 and a lower cover 12 are respectively connected with the upper and lower openings of the valve body 10 through an upper cuff 13 and a lower cuff 14 in a sealing manner, the wall of the valve body 10 is provided with a first hole 15 and a second hole 16 which are opposite to each other, a hose 20 is connected between the first hole 15 and the second hole 16, the upper and lower sides of the hose 20 are provided with an upper clamping rod 30 and a lower clamping rod 40, the upper clamping rod 30 and the lower clamping rod 40 are parallel and form radial constraint or constraint release to the hose 20 when approaching or separating, the tube hole 17 on the wall of the valve body 10 is connected with a reversing valve to selectively communicate a negative pressure source or normal pressure, the two ends of the lower clamping bar 40 are provided with upper pull rods 41 which extend upwards and are fixedly connected with the upper cover 11, the two ends of the upper clamping bar 30 are provided with lower pull rods 31 which extend downwards and are fixedly connected with the lower cover 12, springs for driving the two to be separated are arranged between the two ends of the upper clamping bar 30 and the upper cover 11, and/or springs for driving the two to be separated are arranged between the two ends of the lower clamping bar 40 and the lower cover 12.

In the above scheme, when the pipe hole 17 is selectively communicated with a negative pressure source or normal pressure, the area outside the hose 20 enclosed by the valve body 10, the upper cover 11, the lower cover 12, the upper cuff 13 and the lower cuff 14 is in a negative pressure or normal pressure environment, when in the negative pressure environment, the atmospheric pressure acts on the upper cover 11, the lower cover 12, the upper cuff 13 and the lower cuff 14, due to the soft characteristics of the upper cuff 13 and the lower cuff 14, the upper cover 11 and the lower cover 12 respectively displace towards the side of the chamber of the valve body 10, the upper pull rod 41 and the lower clamping rod 40 displace downwards, the lower pull rod 31 and the upper clamping rod 30 displace upwards, the spring is compressed therebetween, the lower clamping rod 40 and the upper clamping rod 30 are in a spaced position relation, the radial constraint of the hose 20 is relieved to be in a penetrable state, and sewage can drain; under normal pressure, the elasticity of the spring drives the upper cover 11 and the lower cover 12 to separate in the direction away from each other and drives the lower clamping rod 40 and the upper clamping rod 30 to present a displacement close to each other and implement radial clamping restriction on the hose 20 to stop the passage of the hose 20; the springs are arranged at the two ends of the lower clamping rod 40 and/or the upper clamping rod 30, so that the stress of the lower clamping rod 40 and/or the upper clamping rod 30 is prevented from being in a stress state of a cantilever beam, the free end of the cantilever beam is seriously deformed and cannot provide enough clamping force for the two ends of a clamping seam, the scheme that clamping force is provided at the two ends is adopted, the possibility that fine gaps are left at the two ends of the clamping seam when the hose 20 is locally extruded and flattened is eliminated, and the clamping tightness is guaranteed when the hose 20 is restrained. Among the above solutions, there are three specific solutions for arranging the spring, one of which is two ends of the lower clamping rod 40; the second is that two ends of the upper clamping rod 30; and thirdly, the two ends of the lower clamping rod 40 and the upper clamping rod 30 are arranged at the same time. The first scheme and the second scheme can meet the requirement of basic clamping tightness, the structure is simple, the reliability of the third scheme is particularly remarkable, and the structure is slightly complex compared with the first scheme and the second scheme. The following examples and figures are described with scheme two as the preferred scheme. In the illustrated state, the hose 20 is disposed above and below the horizontal hose, and in the specific implementation, the orientation shown in the drawings is the preferred actual installation orientation in normal use. Of course, the barrel core of the valve body 10 may be in a horizontal or inclined position for a particular installation, with the core of the hose 20 being generally horizontal.

As shown in fig. 4 and 5, it is preferable that a spring 50 is sleeved on the shaft of the upper pull rod 41, and the spring 50 is a compression spring and has upper and lower ends abutting against the inner top surface of the upper cover 11 and the two ends of the upper clamping rod 30.

In the above scheme, two springs 50 are preferably arranged on the shaft of the upper pull rod 41, and the upper pull rod 41 as a force transmission component for the displacement of the lower clamping rod 40 also serves as a spring 50 restraining component, so that the two ends of the spring 50 are fixed, the spring body is limited, and the stability of the posture of the spring when the spring deforms is ensured. Since the upper pull rod 41, the upper cover 11 and the lower clamping rod 40 are connected to form an integral rigid member, the force applied to the upper cover 11 by one end of the spring 50 is the power for driving the lower clamping rod 40 to move upward. Meanwhile, the other end of the spring 50 acts on the two ends of the upper clamping bar 30, so that the two springs 50 realize the simultaneous stress of the two ends of the lower clamping bar 40 and the upper clamping bar 30, namely, when the two ends of the lower clamping bar 40 are stressed upwards, the two ends of the upper clamping bar 30 are stressed simultaneously and downwards move, and the hose 20 is clamped to close the lumen passage of the hose.

Preferably, the upper pull rod 41 is connected with both ends of the lower clamping rod 40 at the lower end thereof to form a concave rod, and the upper end of the upper pull rod 41 is detachably and hermetically connected with the upper cover 11.

The upper clamping rod 30 and the lower pull rod 31 extending downwards from two ends of the upper clamping rod form an inverted concave rod frame, and the lower pull rod 31 and the lower cover 12 form a detachable sealing connection.

The concave rod can also be understood as a flat-bottomed U-shaped rod, so that the parallel arrangement relationship of the upper clamping rod 30 and the lower clamping rod 40 is provided, the approaching or separating displacement is ensured on the premise that the upper clamping rod 30 and the lower clamping rod 40 are maintained in the parallel relationship, and in a clamping state or a separating state, a frame surface formed by the upper pull rod 41 and the lower clamping rod 40 is parallel to a frame surface formed by the upper clamping rod 30 and the lower pull rod 31, and a basis is provided for guiding and limiting the position between the upper pull rod and the lower clamping rod.

That is, the above-mentioned solution provides a basis for a preferable solution that the upper clamping rod 30 has holes penetrating in the vertical direction at both ends for the upper pulling rod 41 to pass through. Therefore, the through holes at the two ends of the upper clamping rod 30 not only ensure the arrangement space of the upper pull rod 41, but also realize the limit between the two.

Furthermore, a sliding block guide groove is formed between the outer side of the lower pull rod 31 and the inner cylinder wall of the valve body 10. The position of the frame formed by the upper clamping rod 30 and the lower pull rod 31 is defined in this way, in other words, the frame formed by the upper clamping rod 30 and the lower pull rod 31 is determined relative to the valve body 10, namely, the frame cannot rotate around the cylinder core of the valve body 10, the motion track certainty of the motion parts is ensured, and the reliability of closing the passage of the hose 20 during pressing is further improved.

Further preferably, the protrusion or protrusion 18 of the lower pull rod 31 on the inner wall of the valve body 10 forms a guide groove, and the length direction of the guide groove is parallel to the cylinder core direction of the valve body 10. In specific implementation, two guide grooves are symmetrically arranged on the inner cylinder wall of the valve body 10, and each guide groove is formed by two convex strips 18 which are circumferentially adjacent and arranged at intervals. The convex strip 18 is arranged on the inner cylinder wall of the valve body 10, so that the strength and rigidity of the shell of the valve body 10 can be improved, and the processing is convenient; the motion tracks of the upper pull rod 41 and the lower pull rod 31 are defined, so that the additional technical effect is that the operation postures of the upper cover 11 and the lower cover 12 are simultaneously defined, and the phenomena of twisting and folding in the contraction and expansion processes of the upper cuff 13 and the lower cuff 14 are also prevented.

Referring to fig. 4, 5 and 6, the upper portion of the upper clamping bar 30 between the upper pull rods 41 is provided with recessed cavities 32 arranged at intervals along the length direction thereof. Therefore, the strength of the upper clamping rod 30 can be ensured on the premise of reducing the material consumption, and a supporting table surface is provided for arranging a space for the upper pull rod 41 to penetrate through and for the spring 50 to press.

As shown in fig. 4, 5, 6 and 7, the upper clamping bar 30 has a lateral projection connected to an adjacent portion of the hose 20 and/or the lower clamping bar 40 has a lateral projection connected to an adjacent portion of the hose 20. The hose 20 of fig. 7 is disassembled, and the upper and lower clamping bars 30 and 40 are separated, which corresponds to the drain condition of the hose 20.

More specifically, the upper clamping bar 30 preferably has a hooking rod 33 protruding laterally and hooked to the upper hook 21 of the hose 20, and the lower clamping bar 40 preferably has a hooking rod 42 protruding laterally and hooked to the lower hook 22 of the hose 20.

The hooking connection structure realizes the synchronous displacement of the hose 20 along with the displacement of the upper clamping bar 30 and the lower clamping bar 40, which is very important in the drainage process, that is, when the upper clamping bar 30 and the lower clamping bar 40 are separated, the pipe wall of the hose 20 is unfolded again and forms a drainage passage state under the cooperation and linkage action of the hooking bar 33 and the upper hook ring 21, and the hooking bar 42 and the lower hook ring 22. If the hooking connection function is not available, the upper clamping bar 30 and the lower clamping bar 40 do not drive the tube wall of the hose 20 to perform the re-expansion action when being separated, and the tube wall expansion process of the hose 20 is expanded by the extrusion of flowing sewage, so that the tube wall of the hose 20 is inevitably seriously scoured and abraded, and the service life of the hose 20 is influenced; in addition, the positions of the upper clamping bar 30 and the lower clamping bar 40 pressed on the hose 20 are determined, so that the shape and the personalized design of materials at the position on the hose 20 can be improved, and the performance of the hose can be improved.

The connection scheme of the relevant moving parts is explained in detail below.

The upper end of the upper pull rod 41 is provided with a threaded hole, the upper cover 11 corresponding to the threaded hole is provided with a connecting hole, the upper cover and the connecting hole are connected through a bolt 411, and a sealing gasket 412 is arranged at the connecting position. The above-mentioned solution firstly ensures the connection and sealing performance between the upper pull rod 41 and the upper cover 11.

The lower cover 12 has an upper extension leg 121 at a middle outer portion of the cover plate, a support 122 protruding outward is provided at an upper end of the leg 121, and a screw 123 connects a lower end of the lower link 31 to the support 122.

Two legs 121 are arranged at intervals of high outside and low inside and are connected with the vertical plates 121a, and the two vertical plates 121a on the opposite sides and the lower cover 12 form an open notch shape.

The above scheme ensures the strength of the supporting leg 121 itself, and also provides a space for the hose 50 to deform and for the displacement of the lower clamping bar 40. Because the supporting legs 121 are directly extended from the lower cover 12 to fixedly connect the lower pull rod 31, and the connection parts are all in the area enclosed by the lower cover 12 and the lower sleeve bag 14, the arrangement of sealing elements can be reduced by connecting the lower pull rod 31 to the lower cover 12 through the supporting legs 121, which is beneficial to improving the tightness of the valve body 10 and naturally maintaining the formed negative pressure environment.