TW202221249A - Negative pressure regulating device for pipeline capable of automatically introducing external air to reduce the negative pressure in the pipeline to protect the pipeline - Google Patents

Abstract

This invention relates to a negative pressure regulating device for pipeline, comprising a main body and a suction valve. The main body has a connecting seat and a mounting cylinder. The liquid flows into the mounting cylinder from the connecting seat and then flows out from the connecting seat. The suction valve is disposed at a ventilation opening of the connecting seat and comprises a valve body, a valve stem assembly, and a buoy. The valve body is disposed at the ventilation opening and formed with an air intake passage enabling the internal space of the main body to be communicated with the outside. When the pipeline transports liquid normally, the buoy is floated up to make the valve stem assembly close the air intake passage; when the liquid level in the main body is lower than the top end of the float of the buoy, the buoy is moved down to make the valve stem assembly open the air intake passage, so as to make the external air enter the internal space to reduce the negative pressure in the internal space. Accordingly, this invention can regulate the negative pressure in the pipeline to protect the pipeline.

Description

Pipeline Negative Pressure Regulator

The present invention relates to a pressure regulating device for a liquid conveying pipeline.

When the pipeline used for conveying liquid in the prior art stops conveying liquid, or starts the pump when the inside of the pipeline is not filled with liquid, negative pressure is easily generated in the pipeline due to the flow inertia of the liquid or the height difference of the pipeline. . Under certain circumstances, such as when the vertical extension of the pipeline is very long, when the pump at the bottom of the pipeline stops pumping water upward, the pipeline at the top will generate a strong negative pressure due to the weight of the liquid in the pipeline. This negative pressure may Cause the pipeline to rupture, so that the pipeline sucks sewage dirt.

Therefore, the pipelines used for transporting liquids in the prior art need to be improved.

In view of the aforementioned shortcomings and deficiencies of the prior art, the present invention provides a pipeline negative pressure regulating device. When a negative pressure is generated in the pipeline, the present invention will automatically introduce external air to reduce the negative pressure inside the pipeline and play the role of protecting the pipeline.

In order to achieve the above-mentioned purpose of the invention, the technical means adopted in the present invention is to design a pipeline negative pressure regulating device, which comprises: a body forming an interior space; the body comprising: a connecting seat, which is formed with a body water inlet, a body water outlet and a ventilation opening, and the body water inlet, the body water outlet and the ventilation opening are all formed on the outer wall of the body and communicate with the inner space; an installation barrel, which is detachably connected to the bottom of the connection seat; the installation barrel is a hollow body, and the hollow part of the installation barrel forms an inner area of the barrel; the inner space consists of the connection seat and the inner area of the installation barrel form together; Wherein, after the liquid flows into the inner space from the water inlet of the body, it first flows to the inner area of the cylinder, and then flows toward the water inlet of the channel; A suction valve, which is arranged at the ventilation opening of the connecting seat, and includes: a valve body, which is disposed in the ventilation opening and forms an air intake passage; the air intake passage communicates with the inner space and the outside of the body; a valve stem assembly that selectively closes or opens the intake passage; a float connected to the stem assembly and located in the interior space; Wherein, the float moves up and down with the liquid level in the inner space to make the valve stem assembly have a closed state or an open state; the float can move upward to make the valve stem assembly close the intake passage, so that the valve stem assembly can be closed. The valve stem assembly is in the closed state; the buoy can move downward to make the valve stem assembly open the intake passage, so that the valve stem assembly is in the open state; in the open state, external air can pass through the intake air Channels enter the interior space to reduce negative pressure in the interior space.

When the present invention is in use, the main body is connected in series in a pipeline for conveying liquid. When the pipeline conveys liquid normally, the liquid level in the inner space of the body rises and the buoy floats up, which in turn causes the valve stem assembly to close the air inlet passage. At this time, the liquid simply flows through the body inlet of the body toward the outlet of the body.

The advantage of the present invention is that when the liquid level in the inner space drops due to various reasons such as stopping liquid delivery in the pipeline, the float moves down with the liquid level, thereby enabling the valve stem assembly to open the intake passage. In this way, the outside air can enter the inner space through the air intake passage, so as to avoid the rupture of the inside of the pipe due to strong negative pressure due to various reasons, and has the effect of protecting the pipe.

Further, in the pipeline negative pressure regulating device, a buoy channel extending up and down is formed in the inner space; the ventilation opening is formed at the top of the buoy channel, and a channel water inlet is formed at the bottom and side wall of the buoy channel respectively and a channel water outlet; the liquid in the inner area of the tube flows upward from the channel water inlet into the buoyant channel, and then leaves the buoyant channel through the channel water outlet and flows toward the body water outlet; the buoy is located in the buoyant channel, and The height of the bottom of the buoy corresponds to the height of the outlet of the channel, so that the flow of the liquid produces an upward thrust on the bottom of the buoy.

Further, in the pipeline negative pressure adjusting device, an inner space is formed in the inner space; after the liquid flows into the inner space from the water inlet of the body, it first flows into the inner region of the cylinder, and then flows toward the channel. Inlet flow.

Further, in the pipeline negative pressure regulating device, the main body has a connection seat, the main body water inlet, the main body water outlet and the ventilation opening are all formed in the connection seat; an installation cylinder is a hollow body and detachably connected to the bottom of the connection seat; wherein, the inner space is jointly formed by the connection seat and the hollow part of the installation cylinder, and the inner area of the cylinder is the hollow part of the installation cylinder.

Further, in the pipeline negative pressure regulating device, wherein: the valve rod assembly has: an opening and closing rod, which slidably penetrates the air intake passage; the bottom of the opening and closing rod is located in the inner space, and the opening and closing rod An installation ring groove is formed on the bottom of the o-ring; an O-ring is sleeved with the installation ring groove; a conical groove is formed at the opening of the air inlet channel toward the inner space; wherein, in the closed state, the buoy makes the The outer ring surface of the O-ring presses against the groove wall of the tapered groove to close the intake passage.

Further, in the pipeline negative pressure adjusting device, the buoy has: a connecting part, one end of which is connected to the valve stem assembly; a floating body, which is located at the other end of the connecting part; the bottom of the opening and closing rod is formed an engaging groove; the valve rod assembly further has a connecting rod, one end of the connecting rod pivots the valve body, and the other end pivots the connecting part of the buoy; the connecting rod forms an engaging part, the engaging part The engaging groove for engaging the opening and closing rod is penetrated.

Further, in the pipeline negative pressure regulating device, the valve stem assembly further has an elastic piece, and the elastic piece pushes the opening and closing rod upwards.

Further, in the pipeline negative pressure regulating device, the outer wall surface of the main body is further formed with: two flange joint planes; the main body water inlet is formed on one of the flange joint planes, and the main body water outlet is formed on one of the flange joint planes. another one of the flange joint planes; two first flange fixing structures, which are respectively formed on the two flange joint planes; each of the first flange fixing structures has two first fixing screw holes, and the two first fixing screw holes The two first fixing screw holes of one of the first flange fixing structures are respectively located on opposite sides of the water inlet of the body, and the other one of the first flange fixing structure is recessed in the corresponding flange joint plane. The two first fixing screw holes are respectively located on opposite sides of the water outlet of the body; two second flange fixing structures are respectively formed on the joint plane of the two flanges; each of the second flange fixing structures has four second fixing structures screw holes, the four second fixing screw holes are recessed in the corresponding flange joint plane; the four second fixing screw holes of one of the second flange fixing structures are arranged at equal angular intervals around the body water inlet, and the other The four second fixing screw holes of the second flange fixing structure are arranged at equal angular intervals around the body water outlet.

Further, in the pipeline negative pressure regulating device, the distance between the two first fixing screw holes on each of the flange joint planes is greater than the distance between any two second fixing screw holes on the same flange joint plane .

The technical means adopted by the present invention to achieve the predetermined purpose of the invention are further described below with reference to the drawings and preferred embodiments of the present invention.

Please refer to FIG. 1 , FIG. 2 and FIG. 4 , the pipeline negative pressure regulating device of the present invention includes a main body 10 and a suction valve 20 .

The body 10 forms an inner space 101 , a body water inlet 102 , a body water outlet 103 and a ventilation opening 104 . The body water inlet 102 , the body water outlet 103 and the ventilation opening 104 are formed on the outer wall surface of the body 10 and communicate with the inner space 101 . In this embodiment, the main body 10 is a filter for being installed in a pipeline A for conveying liquid, and has a connection seat 11 and a hollow installation cylinder 12 ; The hollow parts are formed together, and the hollow part of the mounting cylinder 12 is defined as an inner area of the cylinder, and the inner area of the cylinder is preferably used for arranging a filter element. The aforementioned body water inlet 102 , body water outlet 103 and ventilation opening 104 are all formed on the connecting seat 11 . The installation cylinder 12 is detachably connected to the bottom of the connection seat 11 , and the filter element not according to the present invention can be installed in the installation cylinder 12 . In addition, a pontoon channel 111 extending up and down is formed in the inner space 101 (as shown in FIG. 4 ), a ventilation opening 104 is formed at the top of the pontoon channel 111 , and a channel water inlet 112 is formed on the bottom and side walls of the pontoon channel 111 respectively (as shown in FIG. 4 ). 4) and a channel water outlet 113 (as shown in FIG. 4).

In this embodiment, the outer wall surface of the connection seat 11 of the main body 10 is further formed with a water inlet flange joint plane 114 (as shown in FIG. 4 ) and a water outlet flange joint plane 115 . ) is formed on the joint plane 114 of the water inlet flange, and the body water outlet 103 is formed on the joint plane 115 of the water outlet flange.

1 , 4 and 8 , a first flange fixing structure 116 (as shown in FIG. 1 ) and a second flange are formed on the water inlet flange joint plane 114 and the water outlet flange joint plane 115 respectively. Fixed structure 117 (shown in Figure 1). The first flange fixing structure 116 has two first fixing screw holes 1161; the two first fixing screw holes 1161 of the first flange fixing structure 116 located on the water inlet flange joint plane 114 are recessed in the water inlet flange joint plane 114, and They are respectively located on opposite sides of the body water inlet 102 . The two first fixing screw holes 1161 of the first flange fixing structure 116 located on the water outlet flange joint plane 115 are recessed in the water outlet flange joint plane 115 and located on opposite sides of the body water outlet 103 respectively.

The second flange fixing structure 117 has four second fixing screw holes 1171 ; the four second fixing screw holes 1171 of the second flange fixing structure 117 located on the water inlet flange joint plane 114 are recessed in the water inlet flange joint plane 114 , and They are arranged at equal angular intervals around the body water inlet 102 . The four second fixing screw holes 1171 of the second flange fixing structure 117 located on the water outlet flange joint plane 115 are recessed in the water outlet flange joint plane 115 and arranged at equal angular intervals around the body water outlet 103 . More specifically, the distance between the two first fixing screw holes 1161 on the water inlet flange coupling plane 114 is greater than the distance between any two second fixing screw holes 1171 , and the same is true for the fixing screw holes 1161 and 1171 on the water outlet flange coupling plane 115 .

Please refer to FIG. 1 and FIG. 4 , when the present invention is in use, the main body 10 is connected in series in a pipeline A, and the filter element (not shown in the figure) is arranged in the installation cylinder 12 . After the liquid in the pipeline A flows into the inner space 101 from the body water inlet 102, it first flows to the inner area of the installation cylinder 12 for filtration, and then flows upward from the channel water inlet 112 into the buoy channel 111, and then leaves through the channel water outlet 113. The buoy channel 111 finally leaves the inner space 101 through the body water outlet 103 .

When the present invention is serially connected to the pipeline A, it is often necessary to connect the external pipeline components through the flange B, and the common flanges on the market have two specifications of rhombus and square. The first flange fixing structure 116 enables the conventional diamond flanges to be installed at the body water inlet 102 and the body water outlet 103 of the present invention, and the second flange fixing structure 117 enables the body water inlet 102 and the body water outlet 103 of the present invention Conventional square flanges can be installed anywhere. In the present invention, two different flange fixing structures (ie, a first flange fixing structure 116 and a second flange fixing structure 117 ) are provided at the body water inlet 102 and the body water outlet 103, so that the present invention can simultaneously Compatible with two common flange specifications on the market, it reduces the trouble of installation and preparation, and is more convenient to use.

Please refer to FIG. 3 to FIG. 7 , the aforementioned suction valve 20 is disposed at the ventilation opening 104 of the main body 10 , and includes a valve body 21 , a valve stem assembly 22 and a buoy 23 . The valve body 21 is disposed at the ventilation opening 104 and forms an intake passage 211. The intake passage 211 communicates with the interior space 101 of the main body 10 and the outside, so that the outside air can enter the interior space 101 through the intake passage 211 to balance the interior space 101 and the external pressure difference. In this embodiment, a tapered groove 212 is formed at the opening of the air inlet passage 211 toward the inner space 101 (as shown in FIG. 6 ).

The valve stem assembly 22 can be controlled by the buoy 23 to close or open the intake passage 211 . Specifically, the valve stem assembly 22 includes an opening and closing rod 221 , an O-ring 222 , a connecting rod 223 and an elastic member 224 . The opening and closing rod 221 slidably passes through the air intake passage 211 , the bottom of the opening and closing rod 221 is located in the inner space 101 , and a mounting ring groove 2211 and an engaging groove 2212 are formed on the bottom of the opening and closing rod 221 . The O-ring 222 is sleeved with the installation ring groove 2211 . The connecting rod 223 is formed with an engaging portion 2231 , and the engaging portion 2231 passes through the engaging groove 2212 for engaging the opening and closing rod 221 . When the connecting rod 223 is driven by an upward or downward external force, the connecting rod 223 can drive the opening and closing rod 221 to slide up and down relative to the intake passage 211 through the engaging portion 2231 . The elastic member 224 pushes the opening and closing lever 221 upward.

The float 23 is connected to the valve stem assembly 22 and is located in the inner space 101 . The buoy 23 moves up and down with the liquid level in the inner space 101 so that the valve stem assembly 22 has a closed state or an open state. The buoy 23 can move upward to make the valve stem assembly 22 close the intake passage 211, so that the valve stem assembly 22 is in the aforementioned closed state (as shown in FIG. 4 and FIG. 6 ); the buoy 23 can move downward to make the valve stem assembly 22 The intake passage 211 is opened, so that the valve stem assembly 22 is in the aforementioned open state (as shown in FIG. 5 and FIG. 7 ). Specifically, the buoy 23 is located in the buoy channel 111, and the height of the bottom of the buoy 23 corresponds to the height of the channel water outlet 113, so that the flow inertia of the liquid in the buoy channel 111 produces an upward thrust on the bottom of the buoy 23; more specifically In other words, the bottom surface of the buoy 23 is lower than the upper edge of the opening of the channel water outlet 113 . In this embodiment, the buoy 23 has a connecting portion 231 and a floating body 232, and the connecting portion 231 and the floating body 232 are preferably integrally formed. One end of the connecting portion 231 is connected to the connecting rod 223 of the valve stem assembly 22 . The floating body 232 is located at the other end of the connecting portion 231 , and the floating body 232 is preferably a column.

When the pipeline A normally transports liquid, the liquid level in the inner space 101 rises, the liquid floats the buoy 23 up, and the opening and closing rod 221 of the valve stem assembly 22 slides upward, thereby making the outer ring surface of the O-ring 222 tighten the cone The groove wall of the groove 212 is used to close the intake passage 211 (as shown in FIG. 4 and FIG. 6 ), so that the valve stem assembly 22 is in the aforementioned closed state. When the pipeline A is not filled with liquid due to various reasons such as stopping the liquid delivery, and the liquid in the main body 10 drops, the weight of the floating body 232 moves the valve stem assembly 22 downward and opens the intake passage 211, so that the valve stem assembly 22 in the aforementioned open state. In the open state, the outside air can enter the inner space 101 through the air intake channel 211 to reduce the negative pressure in the inner space 101 (as shown in FIG. 5 and FIG. 7 ), thereby avoiding the flow inertia of the liquid inside the pipe A or the flow of the pipe. A strong negative pressure is generated due to reasons such as height difference, which has the effect of protecting the fluid pipeline. In the closed state, the liquid level is preferably higher than the top surface of the floating body 232 ; in the open state, the liquid level is preferably lower than the bottom surface of the floating body 232 .

To sum up, the present invention can automatically detect whether the pipeline A normally transports the liquid by disposing the buoy 23 . When the pipeline A does not convey liquid normally, the buoy 23 opens the intake channel 211 through the valve stem assembly 22, so that the external air enters the pipeline A to adjust the negative pressure, and has the effect of protecting the pipeline A.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Those of ordinary knowledge, without departing from the scope of the technical solution of the present invention, can make some changes or modifications to equivalent embodiments with equivalent changes by using the technical content disclosed above. The technical essence of the invention Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solutions of the present invention.

10: Ontology 101: Interior Space 102: Body water inlet 103: Body outlet 104: Ventilation opening 11: Connector 111: Float channel 112: Channel inlet 113: Channel outlet 114: Inlet flange joint plane 115: Outlet flange joint plane 116: The first flange fixing structure 1161: The first fixing screw hole 117:Second flange fixing structure 1171: Second fixing screw hole 12: Install the barrel 20: Suction valve 21: valve body 211: Intake channel 212: Conical groove 22: Stem assembly 221: Opening and closing lever 2211: Mounting ring groove 2212: snap groove 222: O-ring 223: connecting rod 2231: Engagement Department 224: Elastic 23: Float 231: Connector 232: Float A: Pipe B: Flange

FIG. 1 is a perspective external view of the present invention. FIG. 2 is a partial perspective exploded view of the present invention. 3 is an exploded perspective view of the suction valve of the present invention. FIG. 4 and FIG. 5 are schematic sectional views of the present invention. FIG. 6 is a partial enlarged view of FIG. 4 . FIG. 7 is a partial enlarged view of FIG. 5 . Figure 8 is a partial side view of the present invention.

10: Ontology

101: Interior Space

11: Connector

12: Install the barrel

20: Suction valve

221: Opening and closing lever

222: O-ring

223: connecting rod

23: Float

A: Pipe

B: Flange

Claims (7)

A pipeline negative pressure regulating device, comprising: a body forming an interior space; the body comprising: a connecting seat, which is formed with a body water inlet, a body water outlet and a ventilation opening, and the body water inlet, the body water outlet and the ventilation opening are all formed on the outer wall of the body and communicate with the inner space; an installation barrel, which is detachably connected to the bottom of the connection seat; the installation barrel is a hollow body, and the hollow part of the installation barrel forms an inner area of the barrel; the inner space consists of the connection seat and the inner area of the installation barrel form together; Wherein, after the liquid flows into the inner space from the water inlet of the body, it first flows to the inner area of the cylinder, and then flows toward the water inlet of the channel; A suction valve, which is arranged at the ventilation opening of the connecting seat, and includes: a valve body, which is disposed in the ventilation opening and forms an air intake passage; the air intake passage communicates with the inner space and the outside of the body; a valve stem assembly that selectively closes or opens the intake passage; a float connected to the stem assembly and located in the interior space; Wherein, the float moves up and down with the liquid level in the inner space to make the valve stem assembly have a closed state or an open state; the float can move upward to make the valve stem assembly close the intake passage, so that the valve stem assembly can be closed. The valve stem assembly is in the closed state; the buoy can move downward to make the valve stem assembly open the intake passage, so that the valve stem assembly is in the open state; in the open state, external air can pass through the intake air Channels enter the interior space to reduce negative pressure in the interior space. The pipeline negative pressure regulating device as claimed in claim 1, wherein: A buoy channel extending up and down is formed in the inner space; the ventilation opening is formed at the top of the buoy channel, and a channel water inlet and a channel water outlet are respectively formed on the bottom and sidewall of the buoy channel; The channel water inlet flows upwards into the pontoon channel, and then leaves the pontoon channel through the channel water outlet and flows toward the body water outlet; The buoy is located in the buoy channel, and the height of the bottom of the buoy corresponds to the height of the water outlet of the channel, so that the flow of the liquid produces an upward thrust on the bottom of the buoy. The pipeline negative pressure regulating device as claimed in claim 1 or 2, wherein: The stem assembly has: an opening and closing rod slidably penetrates the air intake passage; the bottom of the opening and closing rod is located in the inner space, and a mounting ring groove is formed on the bottom of the opening and closing rod; an O-ring, which is sleeved with the installation ring groove; The intake passage is formed with a tapered groove toward the opening of the inner space; Wherein, in the closed state, the buoy makes the outer ring surface of the O-ring press against the groove wall of the conical groove to close the intake passage. The pipeline negative pressure regulating device as claimed in claim 3, wherein: The pontoon has: a connecting part, one end of which is connected to the valve stem assembly; a floating body located at the other end of the connecting part; An engaging groove is formed on the bottom of the opening and closing lever; The valve rod assembly further has a connecting rod, one end of the connecting rod pivots the valve body, and the other end pivots the connecting portion of the buoy; the connecting rod is formed with an engaging portion, and the engaging portion passes through and engages the connecting portion of the buoy. The engaging groove of the opening and closing lever. The pipeline negative pressure regulating device according to claim 3, wherein the valve stem assembly further has an elastic member, and the elastic member pushes the opening and closing rod upwards. The pipeline negative pressure regulating device as claimed in claim 1 or 2, wherein the outer wall surface of the main body is further formed with: Two flange joint planes; the body water inlet is formed on one of the flange joint planes, and the body water outlet is formed on the other flange joint plane; Two first flange fixing structures are respectively formed on the joint plane of the two flanges; each of the first flange fixing structures has two first fixing screw holes, and the two first fixing screw holes are recessed in the corresponding flanges. The flange joint plane, wherein the two first fixing screw holes of the first flange fixing structure are respectively located on opposite sides of the body water inlet, and the two first fixing screw holes of the other first flange fixing structure are respectively located on opposite sides of the body outlet; Two second flange fixing structures, which are respectively formed on the joint plane of the two flanges; each of the second flange fixing structures has four second fixing screw holes, and the four second fixing screw holes are recessed in the corresponding flanges. Flange joint plane; one of the four second fixing screw holes of the second flange fixing structure is arranged at equal angular intervals around the body water inlet, and the four second fixing screw holes of the other second flange fixing structure surround the The water outlet of the body is set at equal angular intervals. The pipeline negative pressure regulating device according to claim 6, wherein the distance between the two first fixing screw holes on each of the flange joint planes is greater than the distance between any two second fixing screw holes on the same flange joint plane .

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