Water drain valve

Abstract

The utility model discloses a water drain valve, and belongs to the technical field of valves. Comprising a valve body, a valve cavity communicated with a water inlet and a water outlet and a valve cap arranged on the outer wall of the valve body, a valve element, a valve rod and a first spring are arranged in the valve cavity, the two ends of the first spring abut against the valve cap and the valve rod, the valve element is connected with the valve rod and cuts off the valve cavity under the elastic force action of the first spring, and a clamping connector is arranged on the valve rod. A telescopic mechanism is arranged on the valve bonnet, a clamping groove is formed in the movable end of the telescopic mechanism, and the clamping groove can be connected with the clamping head in a clamped mode and limit the valve rod to retract into the valve cavity. According to the technical scheme, the clamping mode of an existing water drain valve is improved, the problem that the water drain valve cannot be closed due to fatigue failure of an elastic part of the existing water drain valve is solved, and opening and closing of the water drain valve are more reliable and durable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a water drain valve. BACKGROUND

[0002] The radiator for vehicle is an important component in the cooling system of the vehicle, which mainly functions to dissipate the heat generated by the engine to the atmosphere through heat exchange between the cooling liquid and the air, so as to ensure the engine to operate within the normal operating temperature range. The radiator is generally composed of an inlet chamber, an outlet chamber and a radiator core. The cooling liquid flows in the radiator core, and the air passes through the outside of the radiator. The hot cooling liquid is cooled by the air. When the cooling liquid is replaced or the radiator is repaired, the cooling liquid in the radiator needs to be discharged through the water drain valve.

[0003] The prior art, such as the patent with publication number CN219388651U, discloses a water drain valve and a vehicle, which includes a water drain faucet, a piston and a handle. The handle is provided with an elastic part and a clamping part, which cooperates with the protrusion of the water drain faucet to fix the position of the piston. The piston is moved by pulling the handle to achieve the isolation or conduction of the water inlet and the water outlet. In this process, the end of the elastic part away from the water drain faucet is pressed up and down, so that the clamping part releases the clamping of the water drain faucet, thereby the piston is moved relative to the water drain faucet by pulling or pushing the handle. When the external force is removed, the elastic part restores to the initial state under the action of its own elastic force. However, the elastic part is made of elastic material, which is prone to fatigue failure in the process of repeated pressing up and down. As a result, the clamping part cannot clamp the water faucet, and the water drain valve cannot be closed.

[0004] In view of the problems existing in the prior art, the technical scheme of the present application is proposed. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the present application is to provide a water drain valve, which improves the clamping method of the existing water drain valve, avoids the problem that the water drain valve cannot be closed due to the fatigue failure of the elastic part of the existing water drain valve, and makes the opening and closing of the water drain valve more reliable and durable.

[0006] The water drain valve provided by the present application adopts the following technical scheme: a valve body, a valve cavity for conducting the water inlet and the water outlet, a valve cap arranged on the outer wall of the valve body, a valve core, a valve rod and a first spring arranged in the valve cavity, the two ends of the first spring abutting against the valve cap and the valve rod, the valve core being connected with the valve rod and being subjected to the elastic force of the first spring to cut off the valve cavity, a clamping joint being arranged on the valve rod, an extension mechanism being arranged on the valve cap, a clamping groove being arranged on the movable end of the extension mechanism, and the clamping groove being capable of clamping the clamping joint and limiting the retraction of the valve rod into the valve cavity.

[0007] By adopting the technical scheme, the water drain valve opening and closing structure of the elastic part and the clamping part in the prior art is cancelled, and a more reliable first spring, valve core and valve rod structure is adopted. The water inlet end of the water drain valve is communicated with the cooling liquid in the radiator. When the cooling liquid is replaced, the first spring elastic force is overcome, the valve rod end outside the valve cap is pulled, the valve core is separated from the abutting valve cavity, at this time the valve cavity connecting the water inlet and the water outlet is conducted, the water drain valve is opened, and the cooling liquid flows out of the radiator through the water inlet, the valve cavity and the water outlet. In the process of waiting for the cooling liquid to be discharged, the valve rod is pulled to a position beyond the height of the clamping groove, and then the clamping groove of the movable end of the telescopic mechanism is pushed below the clamping head. The valve rod is loosened, and under the action of the first spring elastic force, the valve rod is retracted into the valve cavity, the clamping head is clamped on the clamping groove, and at this time the water drain valve is maintained in the open state without external force.

[0008] When the cooling liquid is drained, the water drain valve needs to be closed, and the valve rod is pulled again. When the clamping head and the clamping groove are separated, the movable end of the telescopic mechanism drives the clamping groove to retract. At this time, the valve rod is not blocked by the clamping groove, and the valve rod is continuously loosened downward. Under the action of the first spring, the valve core abuts against the valve cavity, the valve cavity connecting the water inlet and the water outlet is cut off, and the water drain valve is closed.

[0009] Optionally, the valve core abuts against the inner wall of the valve cavity at one end of the water inlet or the water outlet.

[0010] By adopting the technical scheme, the valve core is retracted in the valve cavity along the valve cavity at one end of the water inlet or the water outlet, and the water drain valve is opened or closed.

[0011] Optionally, the upper part of the valve core is threadedly connected with the valve rod.

[0012] By adopting the technical scheme, the valve core is moved during the pulling and loosening of the valve rod, and the split valve core facilitates the installation of the valve core in the valve cavity. Specifically, the valve core is slid into the valve cavity through the water outlet or the water inlet with a size larger than that of the valve core, and the outer thread of the valve rod is connected and installed after the direction of the valve core is adjusted and the inner thread of the valve core is aligned.

[0013] Optionally, the valve cavity is provided with a sealing ring extending inwardly, and the valve rod is slidably connected with the sealing ring.

[0014] By adopting the technical scheme, the sealing ring extending inwardly and integrally formed with the inner wall of the valve body is arranged, the movement of the valve rod is guided, and the discharged cooling liquid is prevented from entering the valve cap to contaminate the first spring and affect the normal work and service life of the first spring.

[0015] Optionally, the telescopic mechanism comprises a fixed seat, a telescopic slider and a second spring, the fixed seat is fixed to the outer wall of the valve cap, the telescopic slider is slidably connected with the fixed seat, and the second spring abuts against the telescopic slider and the fixed seat.

[0016] By adopting the technical scheme, when the drain valve is opened, the second spring elastic force is overcome to push the telescopic slider to below the clamping head, the valve rod is clamped to avoid the valve rod from retracting into the valve cavity, so that the opening state of the drain valve is maintained. When the drain valve is closed, the clamping head is separated from the clamping groove by pulling the valve rod, the telescopic slider is reset to the initial state and avoids the movement path of the valve rod under the action of the second spring, and the valve rod is continuously loosened, so that the drain valve is closed.

[0017] Optionally, the end of the telescopic slider close to the valve rod is provided with a clamping groove, and the cross section of the clamping groove is trapezoidal or rectangular.

[0018] By adopting the technical scheme, the clamping head and the clamping groove are stably clamped to maintain the opening state of the drain valve, and the clamping head and the clamping groove are easily separated to close the drain valve.

[0019] Optionally, the end of the valve rod away from the valve core is provided with a pulling handle.

[0020] By adopting the technical scheme, the process of pulling the valve rod is more labor-saving.

[0021] Optionally, the abutting surface of the valve core and the valve cavity is provided with a ring groove, and the ring groove is provided with a sealing ring.

[0022] By adopting the technical scheme, the sealing ring is arranged on the abutting surface of the valve core and the valve cavity, so that the sealing performance of the drain valve when closed is improved.

[0023] Optionally, the bottom of the valve core is semispherical.

[0024] By adopting the technical scheme, the contact surface of the bottom of the valve core and the valve cavity is increased, and the sealing performance of the drain valve is improved.

[0025] Optionally, the bonnet is threadedly connected with the valve body.

[0026] By adopting the technical scheme, the bonnet is reliably connected with the valve body, and the assembly of the first spring is facilitated.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. The first spring, the valve core and the valve rod structure are adopted, and the clamping head is arranged on the valve rod, the clamping groove can be clamped with the clamping head and limit the valve rod from retracting into the valve cavity, so that the drain valve can be maintained in the opening state without external force, the reliability of the drain valve is improved, and the risk of accidental closing of the drain valve caused by unstable external force is reduced.

[0029] 2. The ring groove is arranged on the abutting surface of the valve core and the valve cavity, the sealing ring is arranged in the ring groove, the bottom of the valve core is semispherical, the contact surface of the bottom of the valve core and the valve cavity is increased, the sealing performance of the drain valve when closed is improved, the leakage of the coolant is effectively prevented, and the sealing performance of the drain valve is improved.

[0030] 3. The sealing ring is arranged in the valve cavity, the valve rod is in sliding connection with the sealing ring, the back-and-forth movement of the valve rod is guided, and meanwhile, the discharged cooling liquid is prevented from entering the valve cap to contaminate the first spring, affect the normal work and service life of the first spring, and indirectly ensure the long-term stability and effectiveness of the sealing structure of the drain valve. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a whole structure schematic view of the drain valve when the drain valve is closed.

[0032] Figure 2 It is a whole structure schematic view of the drain valve when the drain valve is opened.

[0033] Figure 3 It is a second whole structure schematic view of the drain valve when the drain valve is closed.

[0034] Figure 4 It is an enlarged view of the telescopic mechanism.

[0035] The drawings are described as follows: 1, valve body; 11, water inlet; 12, water outlet; 13, valve cavity; 14, sealing ring; 2, valve cap; 3, valve core; 31, ring groove; 32, sealing ring; 4, valve rod; 41, clamping joint; 5, first spring; 6, telescopic mechanism; 61, fixed seat; 62, telescopic sliding block; 63, second spring; 64, clamping groove; 7, pull handle. DETAILED DESCRIPTION

[0036] The drawings are described as follows: Figure 1 - The drawings are described as follows: Figure 4 The application is further described in detail.

[0037] The embodiment of the application discloses a drain valve.

[0038] The drawings are described as follows: Figure 1 As shown in the drawings, a drain valve comprises a valve body 1, a valve cavity 13 for guiding water inlets 11 and water outlets 12, a valve cap 2 in threaded connection with the outer wall of the valve body 1, a valve core 3, a valve rod 4 and a first spring 5 arranged in the valve cavity 13, the valve core 3 is connected with the valve rod 4, and the first spring 5 is in abutment with the valve cap 2 and the valve rod 4 at both ends and is in a compressed state, as shown in the drawings. Figure 1 As shown in the drawings, the valve rod 4 is subjected to the elastic force of the first spring 5 and abuts the inner wall of the valve cavity 13, so as to cut off the valve cavity 13 for guiding the water inlets 11 and the water outlets 12, specifically, in different embodiments, the valve core 3 can abut the inner wall of the water inlet 11 end of the valve cavity 13 as shown in the drawings or abut the inner wall of the water outlet 12 end of the valve cavity 13 as shown in the drawings, and the difference lies in that the pull and release directions of the valve rod 4 are upward and downward or left and right, and both can play a role in opening and closing the drain valve. Figure 3 Figure 1 ​​

[0039] like Figure 1 As shown, a sealing ring 14 extending inward is provided inside the valve cavity 13. One end of the valve stem 4 is threaded to the upper part of the valve core 3, and the other end is slidably connected to the sealing ring 14 and penetrates the top of the valve cap 2. A snap-fit ​​connector 41 is provided on the valve stem 4 between the sealing ring 14 and the valve cap 2. A telescopic mechanism 6 is provided on the valve cap 2. The movable end of the telescopic mechanism 6 is provided with a snap-fit ​​groove 64, which can snap with the snap-fit ​​connector 41 and restrict the valve stem 4 from retracting into the valve cavity 13.

[0040] like Figure 4 As shown in one embodiment of this application, the telescopic mechanism 6 specifically includes a fixed base 61, a telescopic slider 62, and a second spring 63. The fixed base 61 is fixed to the outer wall of the valve cap 2, the telescopic slider 62 is slidably connected to the fixed base 61, and both ends of the second spring 63 are fixedly connected to the telescopic slider 62 and the fixed base 61. A locking groove 64 is provided at one end of the telescopic slider 62 near the valve stem 4. The locking groove 64 has a trapezoidal or rectangular cross-section. In the natural state of the second spring 63, the locking groove 64 is away from the movement path of the locking connector 41, thus not affecting the lifting and releasing process of the valve stem 4.

[0041] When the drain valve needs to be opened, pull up the handle 7 at one end of the valve stem 4 outside the valve cap 2 to overcome the elastic force of the first spring 5, causing the valve core 3 to separate from the valve cavity 13. At this time, the valve cavity 13 connecting the inlet 11 and the outlet 12 is connected, and the coolant flows out through the inlet 11, the valve cavity 13, and the outlet 12. While waiting for the coolant to drain, pull up the valve stem 4 to a position higher than the locking groove 64, then overcome the elastic force of the second spring 63 to push the locking groove 64 of the telescopic slider 62 of the telescopic mechanism 6 below the locking joint 41, release the valve stem 4, and under the action of the elastic force of the first spring 5, the valve stem 4 retracts into the valve cavity 13. Figure 2 As shown, at this time, the connector 41 is engaged in the connector groove 64, and the drain valve remains open without external force.

[0042] When the coolant is drained, the drain valve needs to be closed. Pull the valve stem 4 again. When the snap-fit ​​connector 41 disengages from the snap-fit ​​groove 64, the second spring 63 of the telescopic mechanism 6 causes the snap-fit ​​groove 64 to retract. At this time, the valve stem 4 is no longer blocked by the snap-fit ​​groove 64. Continue to release the valve stem 4 downward. Under the action of the first spring 5, the valve core 3 abuts against the valve cavity 13. The valve cavity 13 connecting the inlet 11 and the outlet 12 is cut off, and the drain valve is closed.

[0043] To improve the sealing performance when the drain valve is closed, an annular groove 31 is provided on the contact surface between the valve core 3 and the valve cavity 13. A sealing ring 32 is provided within the annular groove 31. The sealing ring 32 is compressed by the annular groove 31 and the inner wall of the valve cavity 13, further improving the sealing performance of the contact surface between the valve core 3 and the valve cavity 13. As one embodiment of this application, the bottom of the valve core 3 can be a hemispherical or frustum-shaped, or other centrally symmetrical structure. Figure 1Only the hemispherical structure is shown.

[0044] The installation of the drain valve of the present application is as follows:

[0045] 1. Slide the valve core 3 into the valve cavity 13 through the water outlet 12 or water inlet 11 which is larger in size.

[0046] 2. Screw the threaded end of the valve stem 4 through the sealing ring 14, adjust the direction of the valve core 3, align the valve stem 4 with the valve core 3, and then screw the threaded connection.

[0047] 3. Put one end of the first spring 5 on the valve stem 4 and the other end against the valve cap 2, screw the valve cap 2 and the valve body 1 through threaded connection, and install the pull handle 7 at the end of the valve stem 4 away from the valve core 3.

[0048] 4. Connect the threaded end of the water inlet 11 of the drain valve body 1 with the outlet of the radiator coolant through threaded connection, and the installation of the drain valve is completed.

[0049] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A drain valve characterized by: The utility model provides a valve body (1), the valve cavity (13) of the water inlet (11) and the water outlet (12) of the valve body (1) are led to, the valve cap (2) of the outer wall of valve body (1) is equipped with the valve core (3), the valve rod (4) and the first spring (5) in the valve cavity (13), the first spring (5) both ends and the valve cap (2) and the valve rod (4) abut, the valve core (3) is connected with the valve rod (4) and is acted by the elastic force of first spring (5) and cuts off the valve cavity (13), the valve rod (4) is equipped with the joint (41), the valve cap (2) is equipped with the telescopic mechanism (6), the movable end of telescopic mechanism (6) is equipped with the joint groove (64), the joint groove (64) can be jointed with joint (41) and limits the valve rod (4) to retract to the valve cavity (13).

2. A blow-off valve according to claim 1, characterised in that: The valve core (3) abuts on the inner wall of one end of the water inlet (11) or the water outlet (12) of the valve cavity (13).

3. A blow-off valve according to claim 2, wherein: The upper part of the valve core (3) is threadedly connected with the valve rod (4).

4. A blow-off valve according to claim 3, wherein: The valve cavity (13) is provided with an inwardly extending sealing ring (14), and the valve rod (4) is slidably connected with the sealing ring (14).

5. A blow-off valve according to claim 1, wherein: The telescopic mechanism (6) comprises a fixed seat (61), a telescopic sliding block (62) and a second spring (63), the fixed seat (61) is fixed to the outer wall of the valve cap (2), the telescopic sliding block (62) is slidably connected with the fixed seat (61), and the second spring (63) abuts against the telescopic sliding block (62) and the fixed seat (61).

6. A blow-off valve according to claim 5, wherein: The telescopic sliding block (62) is provided with a joint groove (64) at one end close to the valve rod (4), and the joint groove (64) is trapezoidal or rectangular in cross section.

7. A blow-off valve according to claim 1, wherein: The valve rod (4) is provided with a pull handle (7) at one end away from the valve core (3).

8. A blow-off valve according to claim 1, wherein: The valve core (3) is provided with a ring groove (31) on the abutting surface with the valve cavity (13), and a sealing ring (32) is arranged in the ring groove (31).

9. A blow-off valve according to claim 8, characterised in that: The bottom of the valve core (3) is semispherical.

10. A blow-off valve according to claim 1, wherein: The valve cap (2) is threadedly connected with the valve body (1).

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