Drainage device of self-operated regulating valve

Abstract

The utility model discloses a drainage device of a self-operated regulating valve. The drainage device comprises a valve body and a valve cavity arranged in the valve body, the drainer is mounted on the valve body, is communicated with the valve cavity and is used for draining accumulated water in the valve cavity, and the drainer comprises a shell mounted on the valve body, a one-way valve arranged in the shell and a driving part movably mounted on the shell and used for driving the one-way valve to be opened. The drainer is installed on the valve body and used for draining water accumulated in the valve body when the valve stops using, and the situation that the service life of the valve is affected due to the fact that the valve is rusted due to the fact that water is accumulated in the valve body for a long time is avoided.

Description

Technical Field

[0001] The utility model relates to, in particular to a drainage device of a self-operated regulating valve. Background Art

[0002] A self-operated regulating valve is a regulating valve that automatically adjusts the valve opening according to the pressure before and after the valve. The self-operated regulating valve is basically in a normally open state during normal use. When it stops being used, it is in a closed state because there is no medium pressure before and after the valve. The lowest point of the valve cavity in the valve is generally lower than the inlet and outlet of the valve. Therefore, when the valve is in a closed state, there will be water accumulation inside the valve cavity. When the valve is stopped, the accumulated water will remain in the valve cavity for a long time, which can easily cause rust and other problems and affect the service life of the valve. To this end, a drainage device for a self-operated regulating valve is proposed. Utility Model Content

[0003] The purpose of the utility model is to solve the above problems and to provide a drainage device of a self-operated regulating valve.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a drainage device of a self-operated regulating valve, comprising a valve body and a valve cavity arranged in the valve body; it is characterized in that it also includes a drainer installed on the valve body and connected with the valve cavity for discharging accumulated water in the valve cavity, and the drainer includes a shell installed on the valve body, a one-way valve arranged in the shell, and a driving member movably installed on the shell for driving the one-way valve to open.

[0005] Further preferably, the one-way valve comprises a one-way valve seat arranged in the housing, a one-way valve cover installed on the housing, and a spring and a ball movably installed between the one-way valve seat and the one-way valve cover.

[0006] Further preferably, the one-way valve cover is provided with a hexagonal through hole.

[0007] Further preferably, the driving member includes an actuator end mounted on the housing and a push rod provided on the actuator end for pushing open the one-way valve.

[0008] Further preferably, the execution end is provided with a plurality of drainage holes for drainage.

[0009] Further preferably, the valve body is provided with a positioning recess for limiting the installation position of the shell, and the positioning recess is provided with a drain port connected to the valve cavity.

[0010] The beneficial effects of the utility model are as follows: by installing a drainer on the valve body, the water accumulated in the valve body can be discharged when the valve is not in use, thereby preventing the valve from rusting due to long-term water accumulation in the valve body, which affects the service life of the valve;

[0011] Through the setting of the one-way valve and the driving member, when the valve is used normally, the one-way valve and the pressure inside the valve itself drive the one-way valve to always be in a closed state to avoid leakage problems. Through the setting of the driving member, when the one-way valve needs to be opened, the one-way valve is pushed by the driving member to overcome the spring and the pressure inside the valve itself to open the one-way valve for drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 It is a structural schematic diagram of the utility model;

[0013] Attached Figure 2 It is a structural schematic diagram of the drainer in the utility model;

[0014] Attached Figure 3 It is a structural schematic diagram of the one-way valve cover in the utility model.

[0015] Legend: 1. Valve body; 11. Valve cavity; 12. Positioning recess; 13. Drain port; 2. Drainer; 21. Housing; 3. Check valve; 31. Check valve seat; 32. Check valve cover; 33. Spring; 34. Ball; 35. Hexagon socket through hole; 4. Drive element; 41. Actuator; 42. Push rod; 5. Drain hole. DETAILED DESCRIPTION

[0016] Next, we will further explain the drainage device of the self-operated regulating valve described in the utility model in conjunction with the accompanying drawings.

[0017] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the utility model are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0018] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense; for example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] See also Figure 1-3As shown in the figure, a drainage device of a self-operated regulating valve comprises a valve body 1 and a valve cavity 11 arranged in the valve body 1; it is characterized in that it also comprises a drainer 2 installed on the valve body 1 and connected with the valve cavity 11 for draining the accumulated water in the valve cavity 11, the drainer 2 comprises a housing 21 installed on the valve body 1, a one-way valve 3 arranged in the housing 21, and a driving member 4 movably installed on the housing 21 for driving the one-way valve 3 to open;

[0020] By installing a drain 2 on the valve body 1, the water accumulated in the valve body 1 can be discharged when the valve is not in use, so as to avoid the valve rusting caused by long-term water accumulation in the valve body 1, thereby shortening the service life of the valve;

[0021] Through the arrangement of the one-way valve 3 and the driving member 4, when the valve is used normally, the one-way valve 3 and the pressure inside the valve itself drive the one-way valve 3 to always be in a closed state to avoid leakage problems. Through the arrangement of the driving member 4, when the one-way valve 3 needs to be opened, the one-way valve 3 is pushed by the driving member 4 to overcome the spring 33 and the pressure inside the valve itself to open the one-way valve 3 for drainage.

[0022] In one embodiment, the one-way valve 3 comprises a one-way valve seat 31 disposed in the housing 21, a one-way valve cover 32 mounted on the housing 21, a spring 33 and a ball 34 movably mounted between the one-way valve seat 31 and the one-way valve cover 32; the one-way valve cover 32 is provided with an inner hexagonal through hole 35;

[0023] The one-way valve cover 32 is detachably mounted on the housing 21 through threads. During installation, the one-way valve cover 32 can be driven to be screwed and installed on the housing 21 through the threads by inserting the hexagonal bolt into the hexagonal through hole 35; the hexagonal through hole 35 is also used to connect the valve cavity 11 and the housing 21 for drainage.

[0024] In one embodiment, the driving member 4 includes an actuator end 41 installed on the housing 21 and a push rod 42 arranged on the actuator end 41 for pushing open the one-way valve 3; the actuator end 41 and the housing 21 are connected by a thread, and when opening or closing the one-way valve 3, it is only necessary to rotate the actuator end 41; one end of the push rod 42 passes through the one-way valve seat 31 and contacts the ball 34, and a gap for drainage is left between the push rod 42 and the one-way valve seat 31.

[0025] In one embodiment, the actuator end 41 is provided with a plurality of drainage holes 5 for drainage. When the one-way valve 3 is opened, the water in the valve cavity 11 flows into the outer shell 21 along the drainage port 13, and then flows through the gap between the top rod 42 and the one-way valve seat 31 to between the actuator end 41 and the one-way valve seat 31, and then is discharged through the drainage holes 5.

[0026] In one embodiment, the valve body 1 is provided with a positioning recess 12 which limits the installation position of the outer shell 21, and the positioning recess 12 is provided with a drain port 13 which is connected to the valve cavity 11; through the setting of the positioning recess 12, the installation position of the outer shell 21 is limited, and the outer shell 21 can be fixedly installed on the positioning recess 12 by means of threads or welding.

[0027] When the utility model is used: when the valve stops being used, it is necessary to drain the water accumulated in the valve cavity 11. When draining, the operator rotates the actuator end 41, and the actuator end 41 drives the push rod 42 to move upward by cooperating with the thread on the shell 21. The push rod 42 contacts the ball 34 during the upward movement and forms an upward thrust on the ball 34. After the channel between the ball 34 and the one-way valve seat 31 is opened, the water in the valve cavity 11 flows through the drain port 13 and the channel on the one-way valve seat 31 to between the one-way valve seat 31 and the actuator end 41, and then is discharged through the drain hole 5 on the actuator end 41. After the accumulated water in the valve cavity 11 is discharged, the actuator end 41 is rotated in the opposite direction. During the downward movement of the actuator end 41, the ball 34 is pushed downward by its own gravity and the restoring force of the spring 33 until the ball 34 fits with the one-way valve seat 31 and the one-way valve 3 is closed.

[0028] The protection scope of the present utility model is not limited to the above embodiments and their variations. Conventional modifications and replacements made by those skilled in the art based on the contents of this embodiment all fall within the protection scope of the present utility model.

Claims

1. A drainage device for a self-operated regulating valve, comprising a valve body (1) and a valve chamber (11) arranged in the valve body (1); wherein: It also includes a drainer (2) mounted on the valve body (1) and connected to the valve cavity (11) for draining water accumulated in the valve cavity (11), the drainer (2) comprising a housing (21) mounted on the valve body (1), a one-way valve (3) arranged in the housing (21), and a driving member (4) movably mounted on the housing (21) for driving the one-way valve (3) to open.

2. A drainage device for a self-operated regulating valve according to claim 1, characterized in that: The one-way valve (3) comprises a one-way valve seat (31) arranged in the housing (21), a one-way valve cover (32) mounted on the housing (21), and a spring (33) and a ball (34) movably mounted between the one-way valve seat (31) and the one-way valve cover (32).

3. A drainage device for a self-operated regulating valve according to claim 2, characterized in that: The one-way valve cover (32) is provided with a hexagonal through hole (35).

4. The drainage device of a self-operated regulating valve according to claim 1, characterized in that: The driving member (4) comprises an actuating end (41) mounted on the housing (21) and a push rod (42) arranged on the actuating end (41) and used for pushing open the one-way valve (3).

5. The drainage device of a self-operated regulating valve according to claim 4, characterized in that: The execution end (41) is provided with a plurality of drainage holes (5) for drainage.

6. The drainage device of a self-operated regulating valve according to claim 1, characterized in that: The valve body (1) is provided with a positioning recess (12) which has a function of limiting the installation position of the housing (21), and the positioning recess (12) is provided with a drainage port (13) which is in communication with the valve cavity (11).

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