Push rod type blow-down valve

Abstract

The invention belongs to the field of valve pipelines, and particularly relates to a push rod type blow-down valve which comprises a through hole valve body with external threads on the lower portion, and an inner hole in the middle of the through hole valve body is a cylindrical sealing face. A sealing ring is arranged at the upper part of a push rod water outlet with a locking cap, the sealing ring is matched with the cylindrical sealing surface to realize movable sealing, and the locking cap is matched with the external thread to drive the push rod water outlet to move up and down and be fixed; a reset spring is arranged between a flange part at the bottom of the push rod and an upper edge protruding ring of the middle inner hole, a clamping sealing ring is arranged on a sealing groove in the upper portion of the drain outlet of the push rod, and the clamping sealing ring is matched with a limiting sealing groove in the upper portion of the upper edge protruding ring to limit the downward sliding position of the push rod. A push rod opening and sealing automatic return structure is adopted, the vertical blow-down valve is completely different from a traditional blow-down valve structure, vertical blow-down is smooth, the structure is simple, the cost is low, the requirement for operation directivity is avoided, the structure is novel, overall cooperation is good, practicability is high, and the market popularization value is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of valve pipelines, and particularly relates to a push-rod type sewage discharge valve. Background Art

[0002] In the field of valve pipelines, the sewage discharge valve is one of the common valves, generally located at the bottom of the pipeline tank body or on the pipeline main body, and is used to discharge the accumulated impurity particles in the pipeline. For example, in the "A sewage discharge pre-filter" shown in the authorized publication number CN 211885638 U, a ball valve type sewage discharge valve is provided at its bottom, and the valve is opened and closed by rotating the valve ball to discharge the impurity particles in the filter. The ball valve type sewage discharge valve has a smooth flow path and a large flow rate, but when installing, it is necessary to adjust the handle angle so that the handle faces the user's direction for easy operation; there is also, such as the "A new type of filter sewage discharge valve" shown in the publication number CN 203868413U, a globe valve type sewage discharge valve is provided at the lower end of the main body ball valve, and the channel is opened for sewage discharge by rotating the core rod. The globe valve type sewage discharge valve also has the function of 360-degree rotation, and the adjustment and use angle is flexible, but the flow rate is smaller than that of the ball valve type sewage discharge valve.

[0003] With the increasing market demand for sewage discharge valves, the sensitivity to its price is getting higher and higher. Moreover, the above two types of sewage discharge valves have many structural parts, a large assembly workload, and high sealing requirements, so their development is restricted. Summary of the Invention

[0004] In view of the existing situation, the present invention provides a sewage discharge valve with a new structure. This structure retains the advantage of large flow rate of the ball valve type sewage discharge valve, and at the same time has no directional requirement for operation, making it more flexible to use; most importantly, it is completely different from the traditional sewage discharge valve, simplifies the structure, and greatly reduces the cost.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A push-rod type sewage discharge valve includes a through-hole valve body with external threads at the lower part, and the inner hole in the middle of the through-hole valve body is a cylindrical sealing surface; an upper part of a push-rod water outlet with a locking cap is provided with a sealing ring, and the sealing ring cooperates with the cylindrical sealing surface to achieve movable sealing. The locking cap cooperates with the external threads to drive the push-rod water outlet to move up and down and be fixed; the upper end surface of the push-rod water outlet also abuts against a push rod with a sewage discharge port. A return spring is provided between the flange part at the bottom of the push rod and the upper convex ring of the inner hole in the middle. A clamping position sealing ring is provided on the sealing groove above the sewage discharge port of the push rod, and the clamping position sealing ring cooperates with the limit sealing groove above the upper convex ring to limit the sliding position of the push rod; sewage can be discharged along the sewage discharge port, the inner hole of the push rod, and the inner hole of the push-rod water outlet; when the limit sealing groove of the through-hole valve body is in close contact with the clamping position sealing ring, the sealing ring of the push-rod water outlet can be located on the cylindrical sealing surface, and the locking cap engages with the external thread part of the through-hole valve body.

[0006] The solution of the present invention can also be: The locking cap and the push rod water outlet are of a split structure. A locking cap groove and a pressing-in limit block are provided on the push rod water outlet. The front end of the pressing-in limit block has a slope, and the protruding dimension is larger than the minimum inner diameter of the locking cap.

[0007] The limit sealing groove of the through-hole valve body is of an arc-shaped groove structure and fits the clamping position sealing ring.

[0008] The lower section of the push rod water outlet is a connecting pipe part with teeth.

[0009] A soft belt is sleeved on the through-hole valve body. One end of the soft belt is buckled with a plug cap. The internal thread in the plug cap can be in threaded fit with the external thread, and the sealing gasket in the plug cap can achieve sealing fit with the bottom end surface of the through-hole valve body.

[0010] The head of the above-mentioned plug cap is a hollow ring with a cut. The outer diameter of the hollow ring is larger than the inner hole of the push rod water outlet. By squeezing the cut to deform, it is fixed by clamping the inner hole of the push rod water outlet.

[0011] A push rod type sewage discharge valve of the present invention adopts a structure of push rod opening and automatic return sealing, which is completely different from the structure of traditional sewage discharge valves. It has vertical discharge, large flow rate, good sewage discharge effect, simple structure and low cost, no requirement for operation directionality, novel product structure, high design practicability, and has market promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 、Schematic diagram of the use state of the present invention on a filter; Figure 2 、Schematic cross-sectional structure diagram of the closed state of the present invention; Figure 3 、Schematic cross-sectional structure diagram of the open state of the present invention; Figure 4 、Schematic three-dimensional structure diagram of the disassembled state of the present invention; Figure 5 、Schematic diagram of the state where the push rod water outlet of the present invention is inserted and the drain valve is not opened; Figure 6 、Schematic diagram of the use state of the present invention on a water distributor.

[0013] In the figure: through-hole valve body 1, middle inner hole 11, cylindrical sealing surface 12, external thread 13, upper edge convex ring 14, limit sealing groove 15, push rod water outlet 2, locking cap 20, sealing ring 21, inner hole of push rod water outlet 22, locking cap groove 23, pressing-in limit block 24, connecting pipe part 25, limit table 26, push rod 3, sewage outlet 30, flange part 31, sealing groove 32, clamping position sealing ring 33, inner hole of push rod 34, return spring 4, soft belt 5, plug cap 50, sealing gasket 51, internal thread 52, cut 53, hollow ring 54, filter 6, water distributor 7. DETAILED DESCRIPTION OF THE INVENTION

[0014] The preferred embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0015] As shown in the Figure 1 accompanying drawings, similar to traditional sewage discharge valves, the push-rod type sewage discharge valve of the present invention can be commonly used in the positions of traditional sewage discharge valves, such as at the lower end of the filter 6, for parallel replacement. Functionally, it is the same. Usually, the sewage discharge valve is in a closed state. The through-hole valve body 1 of the sewage discharge valve of the present invention is in a closed state inside. The plug cap 50 is fixed on the through-hole valve body 1, which can further perform a double-sealing function. The "handle" for opening the through-hole valve body 1 is located at the lower end of the plug cap 50, and the push-rod water outlet 2 is the "handle" for opening the through-hole valve body 1. Unscrew the plug cap 50, and by screwing the push-rod water outlet 2 into the through-hole valve body 1, the sewage discharge valve of the present invention can be opened. The lower section of the push-rod water outlet 2 is a toothed connecting pipe part 25, which is convenient for connecting a rubber tube to drain the sewage in the filter 6 to a suitable place.

[0016] The specific structure of this embodiment is as shown in the Figure 2 to Figure 4 accompanying drawings.

[0017] A push-rod type sewage discharge valve includes a through-hole valve body 1 with an external thread 13 at the lower part. The middle inner hole 11 of the through-hole valve body 1 is a cylindrical sealing surface 12. The upper part of the push-rod water outlet 2 with a locking cap 20 is provided with a sealing ring 21. The sealing ring 21 cooperates with the cylindrical sealing surface 12 to achieve movable sealing. The locking cap 20 cooperates with the external thread 13 to drive the push-rod water outlet 2 to move up and down and be fixed. The upper end surface of the push-rod water outlet 2 also abuts against a push rod 3 with a sewage discharge port 30. A return spring 4 is provided between the flange part 31 at the bottom of the push rod 3 and the upper edge convex ring 14 of the middle inner hole 11. A clamping sealing ring 33 is provided on the sealing groove 32 above the sewage discharge port 30 of the push rod 3. The clamping sealing ring 33 cooperates with the limiting sealing groove 15 above the upper edge convex ring 14 to limit the downward sliding position of the push rod 3. Sewage can be discharged along the sewage discharge port 30, the inner hole 34 of the push rod, and the inner hole 22 of the push-rod water outlet. Unscrew the push-rod water outlet 2, and the push-rod type sewage discharge valve is closed, and there is no water leakage during the rotation and downward movement process.

[0018] The upper part of the push-rod type sewage discharge valve in this embodiment also has an external thread, which is convenient for connecting to the bottom of the pipeline tank body or the pipeline main body and the valve. The connection structure is the same as that of traditional sewage discharge valves. Generally, the thread is a 4 - point British thread. The through-hole valve body 1 can be made of plastic or metal. The middle of the through-hole valve body 1 is a hexagonal structure, which is convenient for tightening. The sewage discharge port 30 of the push rod 3 is a double - opening structure, and it can also be a single - opening or more than three - opening structure.

[0019] The clamping position sealing ring 33 is located above the sewage outlet 30. The return spring 4 presses on the bottom flange portion 31 of the push rod 3 and has a large thrust. When the water outlet 2 of the push rod exits, it can follow and press down until the clamping position sealing ring 33 fits and seals with the limit sealing groove 15. Coupled with the water pressure acting on the push rod 3, under the action of the return spring 4 and the water pressure, the sealing performance of the clamping position sealing ring 33 is stable and reliable. The limit sealing groove 15 of the through-hole valve body 1 is an arc-shaped groove structure that fits the clamping position sealing ring 33, improving the sealing effect so that under long-term pressure, the clamping position sealing ring 33 is not damaged in its storage state. The structure of the push rod type sewage valve has low requirements for the pressure accuracy of the return spring 4, improving the reliability of production.

[0020] The cylindrical sealing surface 12 cooperates with the sealing ring 21 to form an up-and-down movable sealing structure to prevent uncontrolled turbulent flow of sewage. Only through the inner hole 22 of the water outlet of the push rod can the rubber hose connected to the connecting pipe portion 25 flow to the corresponding place.

[0021] The locking cap 20 and the water outlet 2 of the push rod are of a split structure. There are a locking cap groove 23 and a press-in limit block 24 on the water outlet 2 of the push rod. The front end of the press-in limit block 24 has a slope, and the protruding dimension is larger than the minimum inner diameter of the locking cap 20. The locking cap 20 or / and the water outlet 2 of the push rod are made of plastic, and the press-in limit block 24 limits the locking cap 20.

[0022] The locking cap 20 and the water outlet 2 of the push rod can also be of an integral structure, which does not affect the sealing between the cylindrical sealing surface 12 and the sealing ring 21.

[0023] The lower section of the water outlet 2 of the push rod is a toothed connecting pipe portion 25, which is an important part of the sewage valve. Different from ordinary ball valves, the toothed connecting pipe portion 25 has simple hose connection and is conducive to guiding sewage to the corresponding place.

[0024] A soft band 5 is sleeved on the through-hole valve body 1. One end of the soft band 5 is buckled with a plug cap 50. The internal thread 52 in the plug cap 50 can be thread-fitted with the external thread 13. The sealing gasket 51 in the plug cap 50 can achieve sealing cooperation with the bottom end surface of the through-hole valve body 1. The plug cap 50 is the second layer of seal of the sewage valve and can play a temporary sealing role when the clamping position sealing ring 33 fails, which is conducive to making the sewage valve more safe and reliable in the closed state.

[0025] The head of the plug cap 50 is a hollow ring 54 with a notch 53. The outer diameter of the hollow ring 54 is larger than the inner hole 22 of the water outlet of the push rod. By squeezing the notch 53 to deform, it can be fixed by clamping the inner hole 22 of the water outlet of the push rod. As shown in Figure 1 and Figure 2 shown, this structural feature is also an innovative design point of the present invention. When the water outlet 2 of the push rod is not in use usually, it can be fixed on the plug cap 50 to prevent loss. The overall structure design is ingenious, highly practical, and low in cost.

[0026] In this embodiment, the water outlet of the push rod is inserted, and the drain valve is in the unopened state as shown in the appendix Figure 5 as shown. When the limit sealing groove 15 of the through-hole valve body 1 is in sealing fit with the clamping sealing ring 33, the sealing ring 21 of the water outlet 2 of the push rod can be located on the cylindrical sealing surface 12, and the locking cap 20 is engaged with the external thread 13 part of the through-hole valve body 1. The position fit of this structural state is the key to opening the sewage discharge valve. Under the action of water pressure on the push rod 3 and the acting force of the return spring 4, without the engagement of the locking cap 20 and the external thread 13 part, when the water outlet 2 of the push rod is pushed upward, there will be problems such as deviation, large pushing force, and leakage; while the locking cap 20 and the external thread 13 part are engaged, and the sealing ring 21 is located on the cylindrical sealing surface 12, the rotation is easy, and the drain valve conducts water without leakage. When the locking cap 20 is rotated upward, it pushes the water outlet 2 of the push rod and the push rod 3 upward, pushing open the seal of the clamping sealing ring 33, and the sewage outlet 30 is exposed. As the push rod 3 is pushed upward, the sewage outlet 30 becomes larger and the flow rate becomes larger. When the push-rod type sewage discharge valve is closed, there is no water leakage during the rotation and downward movement process or the upward push process. The water outlet 2 of the push rod also has a limit platform 26 to prevent the water outlet 2 of the push rod from being pushed upward excessively.

[0027] The application scenario of the present invention can also be as shown in the appendix Figure 6 as shown. The push-rod type sewage discharge valve is installed on the water distributor 7. Usually, the plug cap 50 is screwed on the through-hole valve body 1, and the water outlet 2 of the push rod is installed on the hollow ring 54. When discharging sewage or pressurizing, the plug cap 50 is unscrewed, and the water outlet 2 of the push rod is screwed onto the through-hole valve body 1, which is simple and convenient to operate. The push-rod type sewage discharge valve has a large water output and smooth sewage discharge. The push-rod type sewage discharge valve can also be installed on valves with sewage discharge functions, solar sewage pipelines, water purification filters, etc.

[0028] A push-rod type sewage discharge valve of the present invention adopts a push-rod opening and automatic seal return structure, which is completely different from the traditional sewage discharge valve structure. It has vertical discharge, smooth sewage discharge, large flow rate, good sewage discharge effect, light opening and closing; simple structure, low cost, no requirement for operation directionality, novel product structure, good overall coordination, high design practicability, and has market promotion value.

Claims

1. A push rod type sewage valve, comprising a through hole valve body (1) with an external thread (13) at the bottom, the middle inner hole (11) of the through hole valve body (1) is a cylindrical sealing surface (12); a push rod water outlet (2) with a locking cap (20) is provided with a sealing ring (21) at the top, the sealing ring (21) cooperates with the cylindrical sealing surface (12) to achieve movable sealing, and the locking cap (20) cooperates with the external thread (13) to drive the push rod water outlet (2) to move up and down and be fixed; a push rod (3) with a sewage outlet (30) is also topped on the upper end surface of the push rod water outlet (2), a return spring (4) is provided between the bottom flange part (31) of the push rod (3) and the upper edge convex ring (14) of the middle inner hole (11), and a locking sealing ring (33) is provided on the sealing groove (32) at the upper part of the sewage outlet (30) of the push rod (3), and the locking sealing ring (33) and the upper edge convex ring The upper limiting sealing groove (15) cooperates with the limiting push rod (3) to slide downward; sewage can be discharged along the sewage outlet (30), the push rod inner hole (34), and the push rod water outlet inner hole (22); when the limiting sealing groove (15) of the through-hole valve body (1) and the locking sealing ring (33) are in a sealed state, the sealing ring (21) of the push rod water outlet (2) can be located on the cylindrical sealing surface (12), and the locking cap (20) is partially engaged with the external thread (13) of the through-hole valve body (1).

2. A push rod type sewage valve according to claim 1, characterized in that: The locking cap (20) and the push rod water outlet (2) are separate structures. A locking cap groove (23) and a push-in limit block (24) are provided on the push rod water outlet (2). The front end of the push-in limit block (24) is inclined, and the protruding size is larger than the minimum inner diameter of the locking cap (20).

3. A push rod type sewage valve according to claim 1, characterized in that: The limiting sealing groove (15) of the through-hole valve body (1) is a circular arc groove structure, which fits the locking sealing ring (33).

4. A push rod type sewage valve according to claim 1, characterized in that: The lower section of the push rod water outlet (2) is a toothed connecting pipe portion (25).

5. A push rod type sewage valve according to claim 1, characterized in that: The through hole valve body (1) is covered with a soft belt (5), one end of the soft belt (5) is buckled with a plugging cap (50), the internal thread (52) of the plugging cap (50) can be threadedly matched with the external thread (13), and the sealing gasket (51) in the plugging cap (50) can achieve sealing cooperation with the bottom end surface of the through hole valve body (1).

6. A push rod type sewage valve according to claim 5, characterized in that: The head of the plugging cap (50) is a hollow ring (54) with a cutout (53). The outer diameter of the hollow ring (54) is larger than the inner hole (22) of the push rod outlet. The hollow ring (54) is deformed by squeezing the cutout (53) and is fixed by clamping the inner hole (22) of the push rod outlet.

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