Light bottom discharging combination valve

Abstract

The utility model discloses a light bottom discharging combination valve, which comprises a foot valve, a butterfly valve, a quick connection outlet and a dust cover, an outlet flange of the foot valve is in concave-convex surface contact with a valve body of the butterfly valve, and a thrust table is arranged in an annular groove for embedding a valve seat; an inlet flange of the quick-connection outlet is in concave-convex surface contact with a valve body of the butterfly valve, and a sealing gasket is arranged between the inlet flange and the valve body; on the basis that the peripheral contour of the outlet flange and the peripheral contour of the inlet flange are square, the middle part of each edge is in a concave arc shape; during installation, the foot valve, the butterfly valve and the quick connection outlet enable the bottom face of a flow channel in the valve to be automatically in butt joint through matching of the round step and the annular groove, matching of the round groove and the round step and tight contact of the conical rotation face and the valve seat, and then the foot valve, the butterfly valve and the quick connection outlet are connected into a whole through four fastening bolts. The utility model has the advantages of compact structure, small volume and light overall weight, and is suitable for different types of foot valves.

Description

Technical Field

[0001] The utility model belongs to a discharging combined valve, and particularly relates to a bottom discharging combined valve. Background Technique

[0002] The bottom discharging combined valve is a valve assembly installed at the bottom of a pressure vessel storage tank to control discharging. The valve and the tank body are both located inside the frame; when designing the tank body, the installation space and weight of the valve need to be reserved to ensure that the total weight of the tank box frame does not exceed the standard regulations after the valve is installed. Therefore, the size and weight of the valve affect the overall design of the pressure vessel. The bottom discharging combined valve has a high usage frequency and is composed of a series combination of multiple different valves, and there are three sealing links in the flow channel, so higher requirements are imposed on the sealing performance and operation convenience.

[0003] The media transported by pressure vessels are diverse, and different media have different requirements for valves due to their different properties. Some media with poor fluidity, strong adhesiveness, and easy crystallization and solidification in storage and transportation on the market need to use valves with special structures to avoid interference and leakage of the above special media to the operation of the valves. Currently, such valves on the market have a relatively complex overall structure, poor versatility, and inconvenient installation.

[0004] Such as Figure 1-1 、 Figure 1-2 、 Figure 1-3 and Figure 1-4As shown, the bottom discharge combination valve is composed of six parts, namely, foot valve 01, butterfly valve 02, quick-connect outlet 03, dust cover 04, valve inter-valve sealing gasket (05, 013), and valve inter-valve fastener 06. The outlet flange 07 of foot valve 01 and the inlet flange 08 of quick-connect outlet 03 are square in shape with the same size, and there are bolt holes 09 at the four corners of the square. The flow channel outer wall 010 of butterfly valve 02 is circular. Butterfly valve 02 is located between foot valve 01 and quick-connect outlet 03. Four bolts 011 are passed through the bolt holes 09 of the square flanges (07, 08) and then locked with nuts 012 for axial fixation. There are gaskets (05, 013) between foot valve 01 and butterfly valve 02, and between butterfly valve 02 and quick-connect outlet 03, and the sealing form is a raised face seal. The bolt 011 is covered with a nylon sleeve 014, and the outer circle of the nylon sleeve 014 is pressed and positioned with the outer circle 010 of the outlet end of the butterfly valve 02 to fix the radial position of the butterfly valve 02. During installation, the three valves are manually adjusted to smooth the internal flow channel docking part 015 and then the nut 012 is tightened to achieve a clamping connection. The cross-sectional shape of the shaft 016 that transmits torque at the rotating part of the foot valve 01 is hexagonal, and it rotates in conjunction with the hexagonal shaft sleeve 017. The butterfly valve 02 is sealed by squeezing the valve plate 018 and the valve seat 019. There is a side plug 020 on the outside of the valve seat 019 installed on the valve body 021 to fix the valve seat 019. After the inter-valve fastener 06 is locked, the outlet flange 07 of the foot valve 01 and the side plug 020 are pressed and fixed in position, and the intermediate gasket 013 is used for sealing. The butterfly valve middle port 022 and the valve stem 023 are sealed by a V-shaped middle port 024 and two O-rings 025. The two ends of the middle port 022 are inlaid with shaft sleeves 026 to support and position the valve stem 023. One end of the valve stem 023 is connected to the butterfly valve handle 027, and the other end is connected to the sealing valve plate 018; the butterfly valve handle 027 is in a straight shape, that is, the handle 028 of the butterfly valve 02 and the valve stem 023 are in the same plane. There is a raised waterline platform 029 on the inlet end flange 08 of the quick-connect outlet 03, which cooperates with the raised waterline platform 031 on the outlet end flange 030 of the butterfly valve 02 for sealing, and the intermediate gasket 05 is used for sealing.

[0005] The above bottom discharge combination valve is composed of multiple valve parts, and its overall weight is large. In particular, the flange connection surface of each valve is large in size and heavy in weight. In addition, the positioning method of the outer circle of the bolt and the outer circle of the butterfly valve by tightening the bolts has low accuracy, and the installation process requires the installer to touch the position of the sealing gasket by hand for leveling, which is relatively cumbersome. When storing and transporting different media, the foot valve cannot be flexibly replaced due to the difficulty of installation. It is relatively wasteful to replace the entire set of combination valves.

[0006] During use, the foot valve needs to be frequently opened, and the hexagonal part at the rotating position wears and slips, resulting in the failure of rotation. The connection between the crank and the valve core is a pin shaft and a split pin, which is not only inconvenient to disassemble but also has a risk of the split pin breaking after long-term use. When installing the welded flange of the foot valve and the tank body, the flatness of the flange is affected by the excessive tightening force of the installation bolts, and there is a risk of jamming of the spring cage valve core on the flange during seat return, causing the sealing of the foot valve to fail. After the valve stem of the butterfly valve rotates back and forth for a long time to open and close, due to long-term wear between the valve stem and the shaft sleeve, deformation is likely to occur, affecting the sealing. The butterfly valve handle in the closed state is close to the outer wall of the tank. When pulling the handle to open the valve, the hand collides with the outer wall of the tank, making it inconvenient to switch. Due to the long-term extrusion of the butterfly valve plate, the valve seat loosens and displaces axially along the flow path. After the butterfly valve plate is pressed again, the valve seat cannot generate sufficient compression, resulting in leakage. Summary of the Invention

[0007] In view of the above-mentioned prior art, the present invention provides an improved lightweight bottom discharge combination valve, which is structurally compact, small in size, and greatly reduces the overall weight. Since the connection between various valve bodies adopts a common structure, different types of foot valves can be replaced for the butterfly valve, making it more versatile. The R-type pin occupies a small volume, and it is more convenient to disassemble when replacing accessories.

[0008] To solve the above technical problems, a lightweight bottom discharge combination valve proposed by the present invention includes a foot valve, a butterfly valve, and a quick connection outlet. A dust cover is provided on the quick connection outlet. The end face of the outlet flange of the foot valve is provided with a protruding circular step A1, and the inner port of the outlet flange is a conical rotating surface. The connection end of the valve body of the butterfly valve and the foot valve is provided with an annular groove A2 for installing a valve seat. The inner diameter of the annular groove A2 matches the outer diameter of the circular step A1 on the outlet flange. A valve seat thrust platform is provided in the annular groove A2, and the conical rotating surface is in close contact with the valve seat. The end face of the inlet flange of the quick connection outlet is provided with a circular groove B1, and the other end of the valve body is provided with a protruding circular step B2. The outer diameter of the circular step B2 matches the inner diameter of the circular groove B1. A sealing gasket is provided between the circular step B2 and the circular groove B1. The outer peripheral contour shapes of the outlet flange and the inlet flange are in the shape of a square with concave arcs in the middle of each side. Four pairs of corresponding bolt holes are respectively provided on the outlet flange and the inlet flange. During installation, the foot valve, the butterfly valve, and the quick connection outlet rely on the cooperation of the circular step A1 and the annular groove A2, the cooperation of the circular groove B1 and the circular step B2, and the close contact between the conical rotating surface and the valve seat to automatically dock the bottom surface of the flow path inside the valve, and then use four fastening bolts to connect the foot valve, the butterfly valve, and the quick connection outlet into one body.

[0009] Furthermore, for the bottom discharge combination valve of the present invention, where:

[0010] The foot valve is one of a lifting type foot valve, a fast flow type foot valve and a heating type foot valve.

[0011] The foot valve is a fast-flow foot valve, and the connection between the crank and the valve core of the fast-flow foot valve adopts a B-type pin; the handle of the fast-flow foot valve and the connecting shaft adopt a spline connection.

[0012] The handle of the butterfly valve is an L-shaped handle, and the rotating shaft of the L-shaped handle is eccentrically arranged with the valve stem of the butterfly valve.

[0013] The foot valve is a lifting type foot valve, and the thickness of the mounting flange of the foot valve is 15-17 mm.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] In the utility model, the outer peripheral contour shape of the outlet flange of the foot valve and the inlet flange of the quick-connect outlet is changed from the original square to an arc shape with the middle part of each side being concave on the basis of the square, thereby reducing the overall weight of the product to the maximum extent while ensuring the strength. Increasing the thickness of the inlet flange of the foot valve (i.e., the mounting flange) can effectively reduce the deformation amount of the lifting foot valve and the tank flange after installation and locking, and avoid the use failure such as spring jamming caused by the deformation of the spring cage of the lifting foot valve.

[0016] In the utility model, a concave-convex embedded and conical surface positioning method is adopted between the foot valve and the butterfly valve, and between the quick-connect outlet and the butterfly valve. Since the bottom planes of the inner flow channels are aligned during the design process, they can be automatically docked during installation and positioning, thereby improving the accuracy of product installation and matching, simplifying the installation method, and improving the installation efficiency. It is realized that a set of bottom unloading combination valves can be replaced with different types of foot valves, while other parts remain unchanged, which is more universal.

[0017] In the utility model, a thrust stop is arranged in the annular groove A2 for embedding the valve seat, which can effectively prevent leakage caused by permanent deformation of the valve seat due to long-term extrusion of the butterfly valve plate.

[0018] When the foot valve in the utility model is a fast-flow foot valve, the foot valve crank and the valve core are connected by a B-type pin, which occupies a small volume and is more convenient to disassemble when replacing accessories.

[0019] In the utility model, the side plug of the conventional butterfly valve is omitted between the foot valve and the butterfly valve, which reduces the risk of leakage and increases the sealing stability of the product. At the same time, the axial length space occupied by the side plug in the valve body is removed, the overall length of the combination valve is reduced, and space is left for increasing the capacity of the tank body.

[0020] In the present utility model, the handle of the butterfly valve adopts an L-shaped handle, which increases the distance between the grip part of the handle in the closed state of the butterfly valve and the tank body, and enlarges the operating space during manual opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1-1 is the front sectional view of a bottom discharge combination valve in the prior art;

[0022] Figure 1-2 is Figure 1-1 the E-E sectional view of the bottom discharge combination valve shown;

[0023] Figure 1-3 is Figure 1-1 the top view of the bottom discharge combination valve shown;

[0024] Figure 1-4 is Figure 1-3 the partial sectional view D-D in

[0025] Figure 2-1 is the front sectional view of Embodiment 1 (lifting foot valve) of the bottom discharge combination valve of the present utility model;

[0026] Figure 2-2 is Figure 2-1 the top view of the bottom discharge combination valve shown;

[0027] Figure 2-3 is Figure 2-1 the side perspective view of the bottom discharge combination valve shown;

[0028] Figure 2-4 is Figure 2-1 the enlarged view of the partial structure at part A in

[0029] Figure 2-5 is Figure 2-1 the enlarged schematic view of the partial structure at part I in

[0030] Figure 2-6 is Figure 2-1 the enlarged schematic view of the partial structure at part II in

[0031] Figure 3-1 is the front sectional view of Embodiment 2 (quick-flow foot valve) of the bottom discharge combination valve of the present utility model;

[0032] Figure 3-2 is Figure 3-1 the enlarged schematic view of the partial structure in the B direction in

[0033] Figure 3-3 is Figure 3-1 the top view of the bottom discharge combination valve shown;

[0034] Figure 3-4 is Figure 3-3Partial sectional view of C-C;

[0035] Figure 4-1 It is the front sectional view of Embodiment 3 (heated foot valve) of the bottom discharge combined valve of the present utility model;

[0036] Figure 4-2 Is Figure 4-1 The top view of the shown bottom discharge combined valve;

[0037] In the figure:

[0038] 1 - Foot valve 2 - Outlet flange 3 - Quick-connect outlet 4 - Inlet flange

[0039] 6 - Butterfly valve 7 - Valve seat 8 - Butterfly valve body 9 - Middle port

[0040] 10 - Valve stem 11 - Handle 12 - Foot valve mounting flange 13 - Dust cover

[0041] 14 - Fastening bolt 15 - Sealing gasket 16 - O-ring 17 - Outer circular part of the valve seat

[0042] 18 - Butterfly valve plate 19 - Crank 20 - Valve core 21 - B-type pin

[0043] 22 - Connecting rod shaft 23 - Heated foot valve 24 - Spring 25 - Valve body

[0044] 26 - Bush 27 - Positioning disk 28 - Positioning shaft 29 - Bush

[0045] 30 - Circumferential boss Detailed implementation method

[0046] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments are by no means any limitation to the present utility model.

[0047] A lightweight bottom discharge combined valve proposed by the present utility model includes a foot valve 1, a butterfly valve 6 and a quick-connect outlet 3, and a dust cover 13 is provided on the quick-connect outlet 3.

[0048] The end face of the outlet flange 2 of the foot valve 1 is provided with a protruding circular step A1, the inner port of the outlet flange 2 is a conical rotary surface, and the connection end of the butterfly valve body 8 of the butterfly valve 6 and the foot valve 1 is provided with an annular groove A2 for fitting the valve seat 7. As Figure 2-5 shown, the inner diameter of the annular groove A2 matches the outer diameter of the circular step A1 on the outlet flange 2, and a valve seat thrust platform 30 is provided in the annular groove A2. As Figure 2-1 and Figure 2-4 shown, the conical rotary surface is in close contact with the valve seat 7.

[0049] The end face of the inlet flange 4 of the quick-connect outlet 3 is provided with a circular groove B1, and the other end of the valve body 8 is provided with a protruding circular step B2. As Figure 2-6 shown, the outer diameter of the circular step B2 matches the inner diameter of the circular groove B1, and a gasket 15 is provided between the circular step B2 and the circular groove B1.

[0050] The outer peripheral contour shapes of the outlet flange 2 and the inlet flange 4 are concave arcs in the middle of each side on the basis of a square; 4 pairs of corresponding bolt holes are respectively provided on the outlet flange 2 and the inlet flange 4. Figure 2-3 Clearly shows the outer contour shapes of the inlet flange and the outlet flange in the present invention.

[0051] During installation, the foot valve 1, the butterfly valve 6 and the quick-connect outlet 3 rely on the cooperation of the circular step A1 and the annular groove A2, the cooperation of the circular groove B1 and the circular step B2, and the close contact between the conical rotating surface and the valve seat 7 to automatically butt the bottom surface of the inner flow path of the valve. Then, four fastening bolts 14 are used to connect the foot valve 1, the butterfly valve 6 and the quick-connect outlet 3 into one body.

[0052] In the present invention, the foot valve is one of a lifting foot valve (such as Figure 2-1 、 Figure 2-2 and Figure 2-3 shown), a quick-flow foot valve (such as Figure 3-1 and Figure 3-3 shown) and a heating foot valve (such as Figure 4-2 and Figure 4-2 shown). The foot valve 1 is a lifting foot valve, and the thickness of the installation flange of the foot valve is 15 - 17 mm. The foot valve 1 is a quick-flow foot valve, and the connection between the crank 19 and the valve core 20 of the quick-flow foot valve adopts a type B pin 21, as Figure 3-2 shown. The handle of the quick-flow foot valve and the connecting shaft 22 adopt a spline connection, as Figure 3-4 shown. The handle 11 of the butterfly valve 6 adopts an L-shaped handle, and the rotating shaft of the L-shaped handle is eccentrically arranged with the valve stem 10 of the butterfly valve 6, as Figure 2-2 、 Figure 3-3 and Figure 4-2 shown.

[0053] The present utility model is an improvement based on the combined valve in the prior art. The main improvement points are as follows: The shapes of the outlet flange 2 of the foot valve 1 and the inlet flange 4 of the quick-connect outlet 3 are star-shaped with the middle parts of each side changed to smooth concave arc shapes on the basis of a square. The outer wall of the fastening bolt 14 closely adheres to the outer wall of the butterfly valve body 8. The sealing surface of the outlet flange 2 of the foot valve is a convex platform composed of a circular step A1. The side plug of the butterfly valve is removed, so that the convex platform sealing surface of the outlet flange 2 of the foot valve 1 directly presses against the valve seat 7 at the inlet end of the butterfly valve 6 to achieve sealing. At the same time, the convex platform sealing surface of the outlet flange 2 of the foot valve 1 is embedded in the annular groove A2 at the inlet end of the butterfly valve body 8 to achieve automatic positioning. The outlet end of the butterfly valve 6 is composed of a protruding circular step B2 to form a convex platform sealing surface, which is embedded and matched with the circular groove B1 arranged on the end face of the inlet flange 4 of the quick-connect outlet 3. After the fastening bolt 14 is tightened, the middle gasket 15 is compressed, and the end faces of the convex and concave platforms compress the gasket to achieve the sealing effect, and the outer circles cooperate with each other to achieve radial positioning. In the present utility model, the thickness of the inlet flange (i.e., the mounting flange 12) of the foot valve 1 is thicker than that of the American standard / German standard flange, that is, the thickness is preferably 15 - 17 mm. The crank 19 and the valve core 20 of the quick-flow foot valve are connected by using a B-type pin 21 to replace the original connecting structure of the pin shaft and the split pin, as Figure 3-2 shown. The cross-sectional shape of the connecting rod shaft 22 for transmitting torque at the rotating part of the foot valve is changed from a hexagon to a spline, as Figure 3-4 shown. The spring 24 of the heating foot valve 23 is placed outside the middle port chamber communicating with the valve body 25 and is isolated from the valve body 25, as Figure 4-1 and Figure 4-2 shown. In the present utility model, the connection dimensions of the foot valves of the lifting type, quick-flow type, and heating type cooperating with the butterfly valve 6 are kept consistent, and the foot valves with different functions can be disassembled and replaced universally.

[0054] In the present utility model, the inlet end of the butterfly valve body 8 of the butterfly valve 6 is concave, and the outlet end is convex. The shape of the outer wall of the middle port is circular. The distance between the two ends of the valve stem 10 inlaid with the shaft sleeves 26 is less than 45 mm. The butterfly valve 6 adopts an L-shaped handle 11, that is, the handle 11 forms an L-shaped structure with a 90° turn at the rotation center; the end of the handle grip has a spherical protrusion. When turning the handle, it is determined whether the valve plate 18 is fully opened or closed by relying on whether the two protrusions perpendicular to each other at the rotation center position of the handle 11 contact the protrusions of the positioning disk 27. There is a circumferential convex platform 30 as a thrust platform on the flow channel in the butterfly valve body 8, and the circumferential convex platform 30 is located at the top of the inner end face part of the valve seat 7. A blind hole is opened at the bottom of the butterfly valve body 8, and the positioning shaft 28 is sleeved with a shaft sleeve 29 and installed in the blind hole.

[0055] Although the present utility model has been described above in conjunction with the accompanying drawings, the present utility model is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present utility model, those of ordinary skill in the art can also make many improvements and changes without departing from the purpose of the present utility model. For example, it can be considered to reduce the length of the middle port and the valve stem of the butterfly valve, so as to reduce the external dimensions and weight of the valve, making it more convenient for installation and operation. At the same time, shortening the valve stem can reduce the deformation torque received by the shaft sleeve and improve the service life of the product. In addition, the height of the butterfly valve handle can be reduced as the middle port of the butterfly valve is shortened, thereby reducing the overall height of the combined valve and lowering the threshold of the installation space. Moreover, a spherical contour is provided at the end of the handle grip, which can increase the comfort and strength of the grip. All of these are within the protection scope of the present utility model.

Claims

1. A lightweight bottom discharge combination valve, comprising a foot valve (1), a butterfly valve (6) and a quick-connect outlet (3), wherein the quick-connect outlet (3) is provided with a dust cover (13), characterized in that: The end surface of the outlet flange (2) of the foot valve (1) is provided with a protruding circular step A1, the inner opening of the outlet flange (2) is a conical rotating surface, the connecting end between the valve body (8) of the butterfly valve (6) and the foot valve (1) is provided with an annular groove A2 for embedding the valve seat (7), the inner diameter of the annular groove A2 matches the outer diameter of the circular step A1 on the outlet flange (2), a valve seat thrust platform is provided in the annular groove A2, and the conical rotating surface is in close contact with the valve seat (7); The end surface of the inlet flange (4) of the quick-connect outlet (3) is provided with a circular groove B1, and the other end of the valve body (8) is provided with a protruding circular step B2, the outer diameter of the circular step B2 matches the inner diameter of the circular groove B1, and a sealing gasket (15) is provided between the circular step B2 and the circular groove B1; The outer contour shape of the outlet flange (2) and the inlet flange (4) is a square shape, with the middle part of each side being an arc shape with a concave shape; the outlet flange (2) and the inlet flange (4) are respectively provided with four bolt holes which are aligned one by one; During installation, the foot valve (1), the butterfly valve (6) and the quick-connect outlet (3) automatically connect with each other by virtue of the cooperation between the circular step A1 and the annular groove A2, the cooperation between the circular groove B1 and the circular step B2, and the close contact between the conical rotating surface and the valve seat (7). Then, the foot valve (1), the butterfly valve (6) and the quick-connect outlet (3) are connected as a whole by means of four fastening bolts (14).

2. The bottom discharge combination valve according to claim 1, characterized in that: The foot valve is one of a lifting type foot valve, a fast flow type foot valve and a heating type foot valve.

3. The bottom discharge combination valve according to claim 2, characterized in that: The foot valve (1) is a fast-flow foot valve, and the connection between the crank (19) and the valve core (20) of the fast-flow foot valve adopts a B-type pin (21).

4. The bottom discharge combination valve according to claim 2, characterized in that: The foot valve (1) is a fast-flow type foot valve, and a handle of the fast-flow type foot valve is connected to a connecting shaft (22) by a spline.

5. The bottom discharge combination valve according to claim 2, characterized in that: The foot valve (1) is a lifting type foot valve, and the thickness of the mounting flange of the foot valve is 15-17 mm.

6. The bottom discharge combination valve according to claim 1, characterized in that: The handle (11) of the butterfly valve (6) is an L-shaped handle, and the rotating shaft of the L-shaped handle is eccentrically arranged with the valve stem (10) of the butterfly valve (6).

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