A pool drain centerline butterfly valve

Abstract

The utility model relates to a pool discharges middle line type butterfly valve, including valve body, valve clapper, hard backrest valve seat, valve shaft and angle stroke single actuating air cylinder, the valve body is the elbow pipe structure, and the hard backrest valve seat sets up in the import end inboard of valve body, and the import end of valve body and hard backrest valve seat all are equipped with the through type upper neck and lower neck with valve shaft cooperation, and the angle stroke single actuating air cylinder is installed in the upper neck, the valve clapper is located in the hard backrest valve seat inboard, and the middle part of valve clapper is equipped with the intermediate hole with valve shaft cooperation, and one end of valve shaft is connected with angle stroke single actuating air cylinder, and the other end is connected with valve clapper through the intermediate hole, the valve body still is equipped with the full open limiting rib through the whole flow channel, and is cooperated with the full open position of valve clapper, compared with prior art, the sealing specific pressure of the utility model product can not change along with the rubber pressure variation or aging hardening, and the sealing is reliable, and the torque is constant, can bear high flow rate simultaneously and has low cost, has absolute competitive advantage in low pressure, high flow rate opening and closing frequent working condition.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pool drain valve structure field, especially a pool drain center line type butterfly valve. BACKGROUND

[0002] The bottom of a pool generally needs to be provided with a drain valve for controlling liquid level or regularly emptying the pool or regularly discharging sludge, and the use feature of the valve is low pressure, intermittent opening and closing, and high flow rate during opening and discharging.

[0003] At present, the valve types used for pool discharge conditions include center line type butterfly valves, ball valves, half ball valves, plug valves, diaphragm control valves, sleeve valves and the like, and only the center line type butterfly valve has the lowest cost among all the valves, but the butterfly valve has large vibration and short service life during high-speed discharge, and simultaneously, due to the forced sealing type of the structure, the aging and hardening of the sealing rubber can cause the operation torque to become large, so a large actuator torque is selected during design, and simultaneously, for some conditions with large amount of silt, the valve disc always rubs against the sealing rubber during opening and closing, which can easily cause wear and tear and affect the sealing life. Furthermore, the valve is usually installed horizontally, but the discharge port is downward, so a 90° elbow is needed to be installed at the outlet of the valve, which increases the additional cost. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at overcoming the defects of the prior art and provides a pool discharge center line type butterfly valve which is reliable in sealing, constant in torque, can withstand high flow rate and has low cost.

[0005] The purpose of the utility model can be achieved by the following technical solutions.

[0006] A pool discharge center line type butterfly valve, comprising a valve body, a valve disc, a hard backrest valve seat, a valve shaft and an angular stroke single-acting air cylinder.

[0007] The valve body is in a bent pipe structure, the hard backrest valve seat is arranged on the inner side of the inlet end of the valve body, the inlet end of the valve body and the hard backrest valve seat are both provided with an upper neck portion and a lower neck portion which are penetrated by the valve shaft, and the angular stroke single-acting air cylinder is installed on the upper neck portion.

[0008] The valve disc is located on the inner side of the hard backrest valve seat, the middle part of the valve disc is provided with an intermediate hole which is matched with the valve shaft, one end of the valve shaft is connected with the angular stroke single-acting air cylinder, and the other end penetrates through the intermediate hole to connect the valve disc.

[0009] The valve body is also provided with a full-opening limiting rib which is penetrated through the entire flow channel and is matched with the full-opening position of the valve disc.

[0010] Further, the outer ring of the hard back valve seat is made of metal or plastic material, and the inner ring is made of vulcanized rubber sealing ring, and the vulcanized rubber sealing ring is provided with a step at the contact position with the sealing surface of the valve disc.

[0011] Further, the step comprises a top step and a bottom step, the top step is located at the back side of the top opening direction when the valve disc is in the full closed position, and the bottom step is located at the back side of the bottom opening direction when the valve disc is in the full closed position.

[0012] Further, the inlet end of the valve body is provided with a hard back valve seat matching hole matched with the hard back valve seat, and the full opening limiting rib is located at the rear of the hard back valve seat matching hole.

[0013] Further, the upper neck of the valve body is provided with a neck small flange, and the angular stroke single-acting air cylinder is installed on the neck small flange.

[0014] Further, the valve body is a 90° elbow pipe structure.

[0015] Further, the connection between the valve body and the pipeline is in the form of a flange.

[0016] Further, the valve disc is a center line type structure, and the contact part of the valve disc and the hard back valve seat is in the shape of a spherical surface.

[0017] Further, the middle hole of the valve disc is a anti-rotation hexagonal hole.

[0018] Further, the angular stroke single-acting air cylinder has an opening torque and a closing torque for driving the valve disc to open and close, the closing torque is provided by the spring in the angular stroke single-acting air cylinder, and the opening torque is provided by compressed air and the piston in the angular stroke single-acting air cylinder.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] (1) the water pool discharging center line type butterfly valve provided by the utility model is provided with a hard back valve seat in the valve body, a valve shaft is arranged to install a valve disc, the sealing surface of the valve disc is provided by the hard back valve seat, and the valve shaft is driven by the angular stroke single-acting air cylinder to realize the opening and closing of the valve disc.

[0021] The hard back valve seat can provide a sealing surface in the shape of staggered steps, the sealing mechanism is completely different from that of the standard center line butterfly valve, the sealing pairs of the valve disc are always not in contact (except the shaft end) during the opening and closing process of the valve disc, when the valve disc is closed to the position, the sealing surfaces on both sides of the valve disc shaft hole contact the step side of the hard back valve seat at the same time, direct extrusion sealing is generated, there is no mutual friction and extrusion, the specific pressure is directly determined by the spring in the air cylinder, and the specific pressure does not change with the variation of the rubber material, so the sealing surface is not worn and has a long service life, and the closing limiting position is directly controlled by the step sealing surface in the valve, so that the sealing specific pressure is constant and the sealing is reliable.

[0022] (2) the valve flap opens, because the product is a discharge valve, the pressure difference before and after the valve is large, the flow rate is high, if there is no anti-vibration design, the valve flap will produce violent vibration, the service life is very short. Therefore, the utility model discloses a full opening limiting rib is arranged in the valve body, the force of the gas source in the cylinder to the piston is guaranteed in the full opening state, the full opening limiting rib of the valve body is directly transmitted through the shaft, the valve flap and each mechanical connecting part, all the matching gaps are eliminated, that is, the vibration of each part of the valve is eliminated, and the service life of the valve is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is an internal section structure schematic view of the closing state of the pool discharge center line type butterfly valve provided in the utility model embodiment;

[0024] Figure 2 It is a whole structure schematic view of the pool discharge center line type butterfly valve provided in the utility model embodiment;

[0025] Figure 3 It is an enlarged schematic view of A area and B area in Figure 1

[0026] Figure 4 It is a structure schematic view of the hard back valve seat provided in the utility model embodiment;

[0027] Figure 5 It is a full opening state position schematic view of the pool discharge center line type butterfly valve provided in the utility model embodiment;

[0028] In the drawing, 1, valve body, 2, valve flap, 3, hard back valve seat, 4, valve shaft, 5, full opening limiting rib, 6, angular stroke single-acting cylinder. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be described clearly and completely in combination with the drawings in the utility model embodiment. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the utility model embodiments described and shown in the drawings can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the utility model.

[0031] ​It should be noted that like reference numerals and letters refer to like items in the several views, and that no further definitions and explanations of the items are required in the subsequent drawings once the items are defined in one drawing.

[0032] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship commonly placed when the utility model product is used, and is merely for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0033] It needs to be explained that the terms "first" and "second" are merely for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0034] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0035] Example 1

[0036] As shown in Figure 1 and Figure 2 The present embodiment provides a pool discharge centerline butterfly valve, which comprises a valve body 1, a valve disc 2, a hard backrest valve seat 3, a valve shaft 4 and an angular stroke single-acting air cylinder 6.

[0037] The valve body 1 is in a bent pipe structure, the hard backrest valve seat 3 is arranged on the inner side of the inlet end of the valve body 1, and the inlet end of the valve body 1 and the hard backrest valve seat 3 are both provided with through-type upper and lower necks matched with the valve shaft 4, and the angular stroke single-acting air cylinder 6 is installed on the upper neck.

[0038] The valve disc 2 is located on the inner side of the hard backrest valve seat 3, the middle part of the valve disc 2 is provided with a middle hole matched with the valve shaft 4, one end of the valve shaft 4 is connected with the angular stroke single-acting air cylinder 6, and the other end penetrates through the middle hole to connect the valve disc 2.

[0039] The valve body 1 is also provided with a full-opening limiting rib 5 penetrating through the entire flow passage and matched with the full-opening position of the valve disc 2.

[0040] Preferably, as shown in Figure 4As shown, the outer ring of the hard back valve seat 3 is made of metal or plastic, and the inner ring is a vulcanized rubber sealing ring. A step is arranged at the contact position between the sealing surface of the valve disc 2 and the sealing ring. As shown in the figure, S is the sealing surface formed between the step and the valve disc, and D is the opening direction of the valve disc. Figure 3

[0041] In this embodiment, the hard back valve seat 3 is a composite of metal (or plastic) and vulcanized rubber. The outer ring is made of metal (or plastic), and the inner ring is a vulcanized rubber sealing ring. A step is arranged at the contact position between the sealing surface of the valve disc 2 and the sealing ring, so that the sealing pair is always separated during the closing process of the valve disc, eliminating the problem of wear between the sealing pairs of the standard centerline butterfly valve.

[0042] Specifically, the step includes a top step and a bottom step. The top step is located at the back side of the top opening direction when the valve disc 2 is in the fully closed position. The bottom step is located at the back side of the bottom opening direction when the valve disc 2 is in the fully closed position.

[0043] Optionally, the inlet end of the valve body 1 is provided with a hard back valve seat matching hole matched with the hard back valve seat 3. The full opening limiting rib 5 is located at the rear of the hard back valve seat matching hole.

[0044] As shown in the figure, when the valve disc 2 is in the fully open position, it is limited by the full opening limiting rib 5. Figure 5

[0045] Optionally, the upper neck of the valve body 1 is provided with a small flange, and the angular stroke single-acting air cylinder 6 is installed on the small flange.

[0046] Optionally, the valve body 1 is in the form of a 90° elbow pipe.

[0047] Optionally, the connection between the valve body 1 and the pipeline is in the form of a flange.

[0048] In this embodiment, the valve body 1 is in the form of a 90° elbow pipe, and the connection with the pipeline is in the form of a flange. A hard back valve seat matching hole is arranged at the inlet end of the valve body 1, and a full opening limiting rib 5 penetrating through the entire flow passage is arranged at the rear of the matching hole. An upper neck and a lower neck matched with the valve shaft 4 are arranged outside, and a small flange is arranged on the upper neck to install the angular stroke single-acting air cylinder 6.

[0049] Optionally, the valve disc 2 is in the form of a centerline structure, and the contact position between the valve disc 2 and the hard back valve seat 3 is in the form of a spherical surface.

[0050] Preferably, the middle hole of the valve disc 2 is a anti-rotation hexagonal hole.

[0051] In this embodiment, the valve disc 2 is in the form of a centerline structure, and the contact position between the valve disc 2 and the hard back valve seat 3 is in the form of a spherical surface. The middle hole is matched with the valve shaft 4, and an anti-rotation hexagonal hole is arranged.

[0052] ​​The upper part of the valve shaft 4 is connected with the angular stroke single-acting cylinder 6, and the lower part is connected with the valve disc 2.

[0053] Preferably, the angular stroke single-acting cylinder 6 has an opening torque and a closing torque for driving the valve disc 2 to open and close, the closing torque is provided by a spring in the angular stroke single-acting cylinder 6, and the opening torque is provided by compressed air and a piston in the angular stroke single-acting cylinder 6.

[0054] In other words, the angular stroke single-acting cylinder 6 provides part of the rotary torque for controlling the opening and closing of the valve disc. The feature is that the closing torque is provided by the built-in spring in the cylinder, and the opening torque is provided by the compressed air and the piston (in the cylinder), and the opening torque must be greater than the closing torque, and the cylinder does not set the mechanical limit for opening and closing.

[0055] The preferred embodiments of the present application are described in detail above. It should be understood that those skilled in the art can make many modifications and changes without creative labor based on the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment based on the existing technology according to the concept of the present application shall be within the protection scope defined by the claims.

Claims

1. A line-type butterfly valve for pool drain, characterized by, It comprises a valve body (1), a valve disc (2), a hard back valve seat (3), a valve shaft (4) and an angular stroke single-acting cylinder (6). The valve body (1) is in a bent pipe shape, the hard back valve seat (3) is arranged inside the inlet end of the valve body (1), the inlet end of the valve body (1) and the hard back valve seat (3) are both provided with through-type upper and lower necks matched with the valve shaft (4), and the angular stroke single-acting cylinder (6) is installed on the upper neck. The valve disc (2) is located inside the hard back valve seat (3), the middle part of the valve disc (2) is provided with a middle hole matched with the valve shaft (4), one end of the valve shaft (4) is connected with the angular stroke single-acting cylinder (6), and the other end penetrates through the middle hole to connect the valve disc (2). The valve body (1) is further provided with a full-opening limiting rib (5) penetrating through the whole flow channel and matched with the full-opening position of the valve disc (2).

2. A linear butterfly valve for pool drain according to claim 1, characterized in that, The outer ring of the hard back valve seat (3) is made of metal or plastic, and the inner ring is a vulcanized rubber sealing ring, and the vulcanized rubber sealing ring is provided with a step at the contact position with the sealing surface of the valve disc (2).

3. A linear butterfly valve for pool drain according to claim 2, characterized in that, The step comprises a top step and a bottom step, the top step is located at the back side of the top opening direction when the valve disc (2) is in the full-closed position, and the bottom step is located at the back side of the bottom opening direction when the valve disc (2) is in the full-closed position.

4. A linear butterfly valve for pool drain according to claim 1, characterized in that, The inlet end of the valve body (1) is provided with a hard back valve seat matching hole matched with the hard back valve seat (3), and the full-opening limiting rib (5) is located at the rear part of the hard back valve seat matching hole.

5. A linear butterfly valve for pool drain according to claim 1, characterized in that, The upper neck of the valve body (1) is provided with a neck small flange, and the angular stroke single-acting cylinder (6) is installed on the neck small flange.

6. A linear butterfly valve for pool drain according to claim 1, characterized in that, The valve body (1) is in a 90° bent pipe shape.

7. A linear butterfly valve for pool drain according to claim 1, characterized in that, The connection between the valve body (1) and the pipeline is in a flange form.

8. A linear butterfly valve for pool drain according to claim 1, characterized in that, The valve disc (2) is in a center line type structure, and the contact part between the valve disc (2) and the hard back valve seat (3) is in a spherical shape.

9. A linear butterfly valve for pool drain according to claim 1, characterized in that, The middle hole of the valve disc (2) is a rotation-preventing hexagonal hole.

10. A linear butterfly valve for pool drain according to claim 1, characterized in that, The angular stroke single-acting cylinder (6) has an opening torque and a closing torque for driving the valve disc (2) to open and close, the closing torque is provided by a spring in the angular stroke single-acting cylinder (6), and the opening torque is provided by compressed air and a piston in the angular stroke single-acting cylinder (6).

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