A pinch valve applied to pipeline on-off

Abstract

The present invention relates to a pinch valve applied to pipeline on-off, which comprises a valve body, a hose nested inside the valve body, and a pair of clamping components arranged on both sides of the hose to achieve the on-off of the hose through relative movement; a cavity for installing the hose and the pair of clamping components and achieving sealing is arranged inside the valve body, and a control interface communicating with the inside of the cavity and intermittently introducing air and vacuum is arranged on the side wall; the pinch valve related to the present invention is applied to a manhole cover ventilated vacuum well. The emergence of the manhole cover ventilated vacuum well is due to the need for the equipment in the vacuum well to achieve a ventilation function. However, in case of special weather, a large amount of sewage flows into the sewage chamber of the vacuum well, triggering the continuous operation of the equipment and causing the system to collapse. At this time, it is required that the pipeline is in an open state under normal weather conditions and in a closed state under special weather conditions. Therefore, a pinch valve capable of realizing pipeline on-off is designed to meet the working requirements of the overall structure.

Description

Technical Field

[0001] The present invention relates to the technical field of on-off valves. In a vacuum sewage continuous collection, temporary storage, and periodic transportation system, there is a temporary sewage collection tank that uses a vacuum sewage discharge valve for periodic sewage discharge, and it can transport the sewage in the sewage collection tank to the downstream vacuum collection pipeline network. When a ventilated manhole cover is used at its upper end, in order to cope with different weather conditions, an on-off valve that can work under the conditions needs to be configured in the pipeline. The present invention particularly relates to a pinch valve applied to pipeline on-off. Background Art

[0002] In a vacuum well system, to ensure effective dry-wet separation between sewage and control equipment, a sealing partition is generally set in the vacuum well, thereby dividing the interior of the vacuum well into a sewage chamber and an equipment chamber. The core components installed in the equipment chamber include a vacuum sewage discharge valve, a pneumatic controller, and a liquid level sensor, etc. The ventilation function is the main function of the pneumatic controller and the vacuum sewage discharge valve in the vacuum well. The main consideration is to avoid the problem of water blockage caused by the lifting bend in the gravity flow pipeline in the ventilation of the sewage chamber of the vacuum well, which in turn leads to low efficiency of the ventilation function. Without indirectly using the sewage chamber for ventilation, the equipment chamber of the vacuum well can be used for direct ventilation, and at this time, a technical solution of manhole cover ventilation can be adopted.

[0003] This manhole cover ventilation technical solution uses a traditional non-sealed manhole cover for ventilation, and the problems it has are also very typical. For example, the problem of ground water accumulation, especially in flood and heavy rain weather, sewage enters the equipment chamber of the vacuum well, which will cause the failure of the pneumatic controller and then cause the paralysis of the vacuum well equipment. However, the vacuum well collects the wastewater generated by residents' daily domestic water, mainly from kitchen and bathroom domestic sewage. If the kitchen and bathroom domestic sewage cannot be emptied in time, then the unusable vacuum well will seriously affect the convenience of residents' daily life. However, due to the short development time of technology in China, the technical accumulation is relatively weak, and generally speaking, the situation is particularly pessimistic.

[0004] To prevent the water accumulation above the non-sealed manhole cover from entering the equipment chamber, a pipeline connected to the sewage chamber is provided in the equipment chamber to discharge the water accumulation from above the manhole cover into the sewage chamber. However, for different weather conditions, the on-off of the pipeline needs to be reasonably controlled, which is mainly divided into the following situations:

[0005] (1) Sunny days: There is no water accumulation on the ground, the pipeline is in an always-open state, and the dry air and dust from the ground can enter the sewage chamber of the vacuum well through the pipeline;

[0006] (2) Heavy rain and flood: The weather condition with a large amount of persistent surface water. For the waterlogging disasters caused by such extreme weather, it is required that the vacuum well must be able to achieve automatic detection and automatic shutdown, and after the ground is cleaned up after the waterlogging, it can automatically reset and run, which is the basic requirement for fully automatic operation. At this time, it is necessary to control the on-off of the pipeline through the valve body;

[0007] (3) Shower: There is a small amount of surface water. In this kind of weather, the rainfall is frequent, the time is short, and the rainfall is large, resulting in the formation of small aggregated shoals and small river channels in low-lying areas on the ground in a short time. For the small river channels at the vacuum well caused by this kind of short and intermittent shower weather, it is also required that the vacuum well must be able to achieve automatic detection, automatic sewage discharge, and then automatically reset and run, which is the basic requirement for fully automatic operation. At this time, it is necessary to control the on-off of the pipeline through the valve body;

[0008] (4) Snow and hail: The precipitation characteristics are in solid form and the mobility is poor. For this type of solid precipitation, it is also required that the vacuum well must be able to achieve automatic detection, automatic sewage discharge, and then automatically reset and run, which is the basic requirement for fully automatic operation. At this time, it is necessary to control the on-off of the pipeline through the valve body.

[0009] For the above four weather conditions, except that the pipeline is in the normally open state on sunny days, the pipelines in other special weather conditions are required to be able to achieve automatic detection and control of on-off. If the pipeline is always in the normally open state, in special weather, the sewage chamber of the vacuum well will always be in a high liquid level state, and the entire vacuum well equipment will continue to work, which will greatly increase the working load of the equipment and reduce its service life. Therefore, it is necessary to control the on-off of the pipeline through the valve body during this process. The present invention has developed a pinch valve applied to the on-off of the pipeline to solve the problems existing in the prior art. After searching, no technical solutions identical or similar to the present invention have been found. Summary of the Invention

[0010] The object of the present invention is to provide a pinch valve applied to the on-off of the pipeline to solve the problem that in the vacuum well system with a non-sealed manhole cover in the prior art, the pipeline designed for ventilation inside the vacuum well cannot adapt to different weather changes to achieve automatic detection and automatic sewage discharge.

[0011] The technical solution of the present invention is: A pinch valve applied to the on-off of the pipeline, including a valve body, a hose nested inside the valve body, and a pair of clamping components arranged on both sides of the hose to achieve the on-off of the hose through relative movement; a cavity for installing and sealing the hose and a pair of clamping components is arranged inside the valve body, and a control interface communicating with the inside of the cavity and intermittently introducing air and vacuum is arranged on the side wall.

[0012] Preferably, the cavity includes a pipeline cavity arranged along the central axis direction of the valve body and a mounting cavity arranged perpendicular to the pipeline cavity; both the pipeline cavity and the mounting cavity are in a cylindrical structure; the hose is coaxially arranged with the pipeline cavity and is nested on the inner wall of the pipeline cavity, and the side wall is opposite to the mounting cavity; a pair of clamping assemblies are arranged in the mounting cavity and are respectively arranged on both sides of the hose.

[0013] Preferably, the clamping assembly includes a corrugated diaphragm, a mounting seat and a cover plate for fixing the edge of the corrugated diaphragm, a chuck fixedly connected to the middle of the corrugated diaphragm, and a return spring for resetting the corrugated diaphragm; both the mounting seat and the cover plate are in an annular structure, are coaxially arranged with the mounting cavity and are nested and fixed in the mounting cavity; the edge of the corrugated diaphragm is fixed between the mounting seat and the cover plate, and the middle is fixedly connected to the chuck through a long rod screw; the chuck moves along the central axis direction of the mounting cavity, and the opposite end faces of a pair of chucks are parallel; the central axis direction of the return spring is parallel to the movement direction of the chuck and is arranged in contact with the inner wall of the mounting cavity.

[0014] Preferably, spring positioning pins for positioning the return spring are arranged between the outer wall edge of the chuck and the inner wall of the mounting cavity, and a pair of limiting strips for limiting the return spring are also arranged on the inner wall of the mounting cavity.

[0015] Preferably, the space formed between the hose and a pair of corrugated diaphragms is communicated with the control interface, and the corrugated diaphragms drive a pair of chucks to move by intermittently introducing air and vacuum at the control interface.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] (1) The pipe clamp valve involved in the present invention is applied to the manhole cover ventilated vacuum well. The manhole cover ventilated vacuum well is born because the equipment in the vacuum well needs to realize the ventilation function. However, in case of special weather, if sewage enters the equipment cavity in the vacuum well, it will cause faults of the relevant equipment in the equipment cavity, and then cause the paralysis of the vacuum well equipment. Therefore, a reasonable pipeline needs to be designed, which can not only ensure reasonable ventilation under normal weather conditions, but also avoid a large amount of sewage flowing into the sewage cavity of the vacuum well all at once in case of special weather, triggering the system paralysis caused by the continuous operation of the equipment. At this time, it is required that the pipeline is in an open state under normal weather conditions and in a closed state under special weather conditions. Therefore, a pipe clamp valve capable of realizing the on-off of the pipeline is designed.

[0018] (2) Inside the pinch valve, a sealed space communicating with the control interface is formed by a pair of corrugated diaphragms and a hose. The control interface is used to continuously introduce air or create a vacuum, thereby realizing the air pressure change in the sealed space. When air is introduced into the sealed space, the air pressures at both ends of the corrugated diaphragm are the same, and the corrugated diaphragm is in the reset state under the action of the return spring. A pair of chucks do not exert a force on the hose, so that the hose is in the normally open state. When a vacuum is generated in the sealed space, the air pressure on the outer side of the corrugated diaphragm is greater than that on the inner side, thereby pushing the corrugated diaphragm to drive a pair of chucks to move towards the hose side and clamp the hose, making the hose in the normally closed state.

[0019] (3) The pinch valve involved in the present invention is mainly applied to the sewage pipeline, including road surface water. Since the road surface water contains a large amount of sludge, the traditional pipeline structure design and the design of the valve body (such as ball valve, slide valve, diaphragm valve) are likely to cause sludge precipitation and blockage, resulting in the inability to discharge the sludge, and further affecting the on-off effect of the pipeline. However, in the present invention, a pinch valve is adopted. The hose in the pinch valve is used to form a connection with the sewage pipeline. When the pinch valve is closed, the sludge in the water accumulates in the hose. Even if it accumulates on the hose, when the pinch valve is opened, relying on gravity and the continuously increasing diameter of the hose in the open state, the accumulated sludge can be effectively and smoothly discharged without causing blockage. More importantly, the pinch valve has good tolerance for filament impurities such as hair, and will not cause problems with poor closing of the pinch valve.

[0020] (4) The on-off state of the pinch valve is related to the ventilation state at the control interface. Since the ventilation function is the main function of the related equipment (such as pneumatic controller, vacuum sewage valve, etc.) in the vacuum well, under different weather conditions, the ventilation state inside the vacuum well will change, thereby providing an effective triggering condition for the opening and closing of the pinch valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the drawings and embodiments:

[0022] Figure 1 It is a schematic diagram of the external structure of a pinch valve applied to the on-off of a pipeline according to the present invention;

[0023] Figure 2 It is the front view of a pinch valve applied to the on-off of a pipeline according to the present invention;

[0024] Figure 3 It is the A-A view of a pinch valve applied to the on-off of a pipeline according to the present invention;

[0025] Figure 4 It is the B-B view of a pinch valve applied to the on-off of a pipeline according to the present invention;

[0026] Figure 5 This is a cross-sectional view of the valve body of the present invention along a direction perpendicular to the axis of the control interface;

[0027] Figure 6 This is a cross-sectional view of the valve body of the present invention along a direction parallel to the axis of the control interface;

[0028] Figure 7 This is a cross-sectional view of the installation structure of the clamping assembly of the present invention;

[0029] Figure 8 This is a schematic structural diagram of the clamping assembly of the present invention.

[0030] Wherein: 1, valve body; 2, hose; 3, clamping assembly; 4, control interface; 5, pipeline; 6, installation cavity; 7, mounting seat; 8, cover plate; 9, corrugated diaphragm; 10, chuck; 11, return spring; 12, long rod screw; 13, spring positioning pin; 14, limiting strip; 15, air guide groove. Detailed implementation manners

[0031] The following further elaborates on the content of the present invention in conjunction with specific embodiments:

[0032] As Figure 1-4 shown, a pipe clamp valve applied to the on-off of a pipeline includes a valve body 1, a hose 2 nested inside the valve body 1, and a pair of clamping assemblies 3 arranged on both sides of the hose 2 to achieve the on-off of the hose 2 through relative movement; a cavity for installing the hose 2 and the pair of clamping assemblies 3 and achieving sealing is provided inside the valve body 1, and a control interface 4 communicating with the inside of the cavity and intermittently introducing air and vacuum is provided on the side wall.

[0033] Combined with Figure 3 、 Figure 5 shown, the cavity includes a pipeline cavity 5 arranged along the central axis direction of the valve body 1 and an installation cavity 6 perpendicular to the pipeline cavity 5, that is, Figure 3 the channels passed by the two perpendicular curves in Figure 6 ; both the pipeline cavity 5 and the installation cavity 6 are cylindrical structures, wherein the central axis of the pipeline cavity 5 is arranged vertically, and the central axis of the installation cavity 6 is arranged horizontally; as

[0034] As Figure 3As shown, the hose 2 is coaxially arranged with the pipeline cavity 5 and nested on the inner wall of the pipeline cavity 5, and its side wall faces the installation cavity 6; the hose 2 is made of rubber material, which is convenient for its deformation to achieve on-off.

[0035] Combined with Figure 3 、 Figure 4 、 Figure 7 As shown, a pair of clamping components 3 are arranged in the installation cavity 6 and are arranged on both sides of the hose 2; combined with Figure 8 As shown, the clamping component 3 includes a corrugated diaphragm 9, a mounting seat 7 and a cover plate 8 for fixing the edge of the corrugated diaphragm 9, a chuck 10 fixedly connected to the middle of the corrugated diaphragm 9, and a return spring for resetting the corrugated diaphragm 9; among them, the mounting seat 7 and the cover plate 8 are both annular structures, coaxially arranged with the installation cavity 6 and nested and fixed in the installation cavity 6; the edge of the corrugated diaphragm 9 is fixed between the mounting seat 7 and the cover plate 8, and the middle part is fixedly connected to the chuck 10 through a long rod screw 12; the chuck 10 moves along the central axis direction of the installation cavity 6, and the opposite end faces of the pair of chucks 10 are parallel; the central axis direction of the return spring is parallel to the movement direction of the chuck 10 and is arranged in contact with the inner wall of the installation cavity 6; spring positioning pins 13 for positioning the return spring 11 are arranged between the outer wall edge of the chuck 10 and the inner wall of the installation cavity 6, and a pair of limiting strips 14 for limiting the return spring 11 are also arranged on the inner wall of the installation cavity 6.

[0036] Through the design of the above structure, the space formed between the hose 2 and the pair of corrugated diaphragms 9 is communicated with the control interface 4, and the corrugated diaphragm 9 drives the pair of chucks 10 to move by intermittently introducing air and vacuum at the control interface 4.

[0037] The design idea of the present invention is as follows:

[0038] In the vacuum well system, the core components mainly include a vacuum sewage valve, a pneumatic controller and a liquid level sensor. Among them, the ventilation function is the main function of the pneumatic controller and the vacuum sewage valve in the manhole cover ventilation type vacuum well. The main consideration is to avoid the water blockage problem caused by the existence of the lifting bend in the gravity flow pipeline during the ventilation process of the sewage chamber of the vacuum well, which in turn causes the problem of low ventilation function efficiency. Without indirectly using the sewage tank for ventilation, the equipment chamber of the vacuum well can be used for direct ventilation instead.

[0039] Since the chamber of the vacuum well equipment is set to a sealed and dry environment to prevent sewage from entering the pneumatic controller, there are mainly two ways to directly ventilate using the chamber of the vacuum well equipment. One is the ventilation pipe ventilation type near the vacuum well: in this scheme, the ventilation port or pipeline is arranged outside the manhole cover. The other is the manhole cover ventilation type: it is required to add ventilation holes on the manhole cover. Considering that the manhole cover is placed on the ground and there will be various vehicles passing by, and even heavy rain, this requires that the manhole cover ventilation type not only solve the ventilation problem but also solve the problems of sewage detection and sewage discharge on the manhole cover, so as to achieve automatic detection, automatic ventilation and sewage discharge, and finally realize the automatic control of the vacuum well.

[0040] The design purpose of the present invention is as follows:

[0041] In the case of non-ponding on the road surface, the ventilated manhole cover can realize free ventilation with the inside of the vacuum well. When the road surface has ponding due to weather changes, in order to avoid a large amount of sewage entering the sewage chamber in the vacuum well and causing the relevant equipment to work continuously, at this time, the connection path between the upper and lower ends of the manhole cover needs to be closed, and thus a pinch valve is designed.

[0042] The working principle of the present invention is as follows:

[0043] In the non-working state, air is introduced at the control interface 4, and the ventilation mode is as shown by the dotted line in Figure 6 . At this time, the air pressures at both ends of the corrugated diaphragm 9 are the same, and it is in the reset state under the action of the return spring 11. A pair of chucks 10 do not exert force on the hose 2, so that the hose 2 is in the normally open state for ventilation.

[0044] In the working state, a vacuum is formed at the control interface 4. At this time, a vacuum is generated in the sealed space formed between a pair of corrugated diaphragms 9 and the hose 2. Then, the air pressure on the outer side of the corrugated diaphragm 9 is greater than that on the inner side, so as to push the corrugated diaphragm 9 to drive a pair of chucks 10 to move towards the hose 2 side and clamp the hose 2, making the hose 2 in the normally closed state to avoid a large amount of sewage flowing continuously into the vacuum well interior under bad weather conditions.

[0045] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It is not intended to limit the protection scope of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A pipe clamp valve applied to pipeline on-off, characterized in that: it includes a valve body, a hose nested inside the valve body, and a pair of clamping components arranged on both sides of the hose to achieve the on-off of the hose through relative movement; a cavity for installing the hose and the pair of clamping components and achieving sealing is arranged inside the valve body, and a control interface is arranged on the side wall of the valve body, which is connected to the inside of the cavity and intermittently introduces air and forms a vacuum inside the cavity; the cavity includes a pipeline cavity arranged along the central axis direction of the valve body and an installation cavity arranged perpendicular to the pipeline cavity; both the pipeline cavity and the installation cavity are of cylindrical structures; the hose is coaxially arranged with the pipeline cavity and nested on the inner wall of the pipeline cavity, and the side wall of the hose faces the installation cavity; the pair of clamping components are arranged in the installation cavity and are arranged on both sides of the hose; the clamping component includes a corrugated diaphragm, a mounting seat and a cover plate for fixing the edge of the corrugated diaphragm, a chuck fixedly connected to the middle of the corrugated diaphragm, and a return spring for resetting the corrugated diaphragm; both the mounting seat and the cover plate are of annular structures, coaxially arranged with the installation cavity and nested and fixed in the installation cavity; the edge of the corrugated diaphragm is fixed between the mounting seat and the cover plate, and the middle is fixedly connected to the chuck through a long rod screw; the chuck moves along the central axis direction of the installation cavity, and the opposite end faces of the pair of chucks are parallel; the central axis direction of the return spring is parallel to the movement direction of the chuck and is arranged in contact with the inner wall of the installation cavity; spring positioning pins are arranged between the outer wall edge of the chuck and the inner wall of the installation cavity for positioning the return spring, and a pair of limit strips for limiting the return spring are also arranged on the inner wall of the installation cavity; the control interface penetrates from the side wall of the valve body and extends to the middle of the cavity, and air guide grooves communicating with the cavity are opened at the upper and lower ends inside the control interface to achieve the connection between the control interface and the middle of the cavity.

2. A pipe clamp valve applied to pipeline on-off according to claim 1, characterized in that: the space formed between the hose and the pair of corrugated diaphragms is connected to the control interface, and by intermittently introducing air and forming a vacuum in the space through the control interface, the corrugated diaphragm drives the pair of chucks to move.

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