Manual thin gate valve

Abstract

The utility model discloses a manual thin gate valve which comprises a valve body and a valve rod, a valve cavity is formed in the valve body, an upper shell is fixedly installed at the lower end of the valve rod, the upper shell is placed in the valve cavity in the valve body, the side faces of the two ends of the upper shell are attached to the surface of the valve cavity, and the valve rod is arranged in the valve cavity. Two parallel installation grooves are formed in the lower end of the upper shell, a sealing plate is fixedly installed in each installation groove, springs are arranged on the sides, close to each other, of the two sealing plates, the upper ends of the springs and the lower end face of the upper shell are fixedly installed, and supporting blocks are fixedly connected to the lower ends of the springs. The sealing performance of the gate valve is improved.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, specifically a manual thin gate valve. Background Technology

[0002] Gate valves, as core control components of industrial pipeline systems, achieve precise shut-off or complete flow control of fluids within the pipeline through their internally adjustable opening and closing mechanisms. They are widely used in high-pressure, large-diameter pipeline systems in petrochemical, power, and water supply and drainage industries, serving as crucial shut-off devices for controlling the flow of media.

[0003] In the existing technology, thin gate valves mostly use a single opening and closing element to control the pipeline opening and closing. A single opening and closing element is prone to deformation and wear, which leads to a decrease in the sealing reliability of the gate valve.

[0004] Therefore, it is necessary to design a manual, thin-film gate valve to improve sealing reliability. Utility Model Content

[0005] The purpose of this invention is to provide a manual thin gate valve to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a manual thin gate valve, including a valve body and a valve stem. The valve body has a valve cavity inside. An upper housing is fixedly installed at the lower end of the valve stem. The upper housing is placed in the valve cavity inside the valve body. The two side surfaces of the upper housing are in contact with the surface of the valve cavity. The lower end of the upper housing has two parallel mounting grooves. A sealing plate is fixedly installed in each mounting groove. A spring is provided on the side of the two sealing plates that are close to each other. The upper end of the spring is fixedly installed to the lower end face of the upper housing. The lower end of the spring is fixedly connected to a support block to realize the closing of the gate valve. The two independent sealing plates greatly improve the sealing performance of the gate valve.

[0007] According to the above technical solution, a base is fixedly installed at the bottom of the valve body, and a handwheel is threadedly connected to the upper end of the valve stem.

[0008] According to the above technical solution, a groove is provided at the upper end of the base, and lower housings are fixedly installed on both sides of the upper part of the base. A lifting block is provided on the side of the two lower housings that are close to each other, and the lifting block is fixedly installed in the groove of the base.

[0009] According to the above technical solution, through holes are provided on both sides of the valve cavity, and valve body flow channels are fixedly installed in the through holes. An installation plate is fixedly installed at the end of the valve body flow channel away from the valve cavity, and a sealing ring is fixedly installed at the end of the valve body flow channel close to the valve cavity.

[0010] According to the above technical solution, a lower valve cover is fixedly installed on the upper end of the valve body, a plurality of valve brackets are fixedly installed on the upper end of the lower valve cover, an upper valve cover is fixedly installed on the upper end of the valve brackets, a bearing seat is fixedly installed on the upper end of the upper valve cover, the bearing seat has a stepped groove, a bearing is fixedly installed in the stepped groove, and the bearing is sleeved on the shaft of the valve stem.

[0011] According to the above technical solution, a fixing groove is provided at the upper end of the lower housing.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are: by setting a sealing plate, a support block, and a lifting block, and by installing two independent sealing plates, this utility model greatly improves the sealing reliability of the gate valve. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0016] Figure 3 This is a schematic diagram of the present invention;

[0017] Figure 4 This is a schematic diagram of the present invention;

[0018] In the diagram: 1. Valve body; 2. Valve frame; 3. Handwheel; 4. Mounting plate; 5. Valve stem; 6. Upper valve cover; 7. Lower valve cover; 8. Bearing seat; 9. Base; 10. Lower housing; 11. Upper housing; 12. Lifting block; 13. Support block; 14. Sealing plate; 15. Sealing ring; 16. Valve body flow channel; 17. Bearing; 18. Spring; 19. Through hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4The present invention provides a technical solution: a manual thin gate valve, including a valve body 1 and a valve stem 5. The valve body 1 has a valve cavity inside. A base 9 is fixedly installed at the bottom of the valve body 1. A groove is opened at the upper end of the base 9. Lower housings 10 are fixedly installed on both sides above the base 9. A lifting block 12 is provided on the side of the two lower housings 10 that are close to each other. The lifting block 12 is fixedly installed in the groove of the base 9. A fixing groove is opened at the upper end of the lower housings 10.

[0021] The upper end of the valve stem 5 is connected to a handwheel 3 via a thread. The lower end of the valve stem 5 is fixedly installed with an upper housing 11. The upper housing 11 is placed inside the valve cavity of the valve body 1. The two sides of the upper housing 11 are in contact with the surface of the valve cavity. The lower end of the upper housing 11 has two parallel mounting grooves. A sealing plate 14 is fixedly installed in each mounting groove. A spring 18 is provided on the side of the two sealing plates 14 that are close to each other. The upper end of the spring 18 is fixedly installed with the lower end face of the upper housing 11. The lower end of the spring 18 is fixedly connected to a support block 13.

[0022] Both sides of the valve cavity are provided with through holes 19, and valve body flow channels 16 are fixedly installed in the through holes 19. The end of the valve body flow channel 16 away from the valve cavity is fixedly installed with a mounting plate 4, and the end of the valve body flow channel 16 close to the valve cavity is fixedly installed with a sealing ring 15.

[0023] A lower valve cover 7 is fixedly installed on the upper end of the valve body 1. Several valve brackets 2 are fixedly installed on the upper end of the lower valve cover 7. An upper valve cover 6 is fixedly installed on the upper end of the valve brackets 2. A bearing seat 8 is fixedly installed on the upper end of the upper valve cover 6. The bearing seat 8 has a stepped groove. A bearing 17 is fixedly installed in the stepped groove. The bearing 17 is sleeved on the shaft of the valve stem 5.

[0024] Working principle:

[0025] When the gate valve needs to be closed, turn the handwheel 3. The handwheel 3 drives the valve stem 5 downward through the threaded transmission. The valve stem 5 drives the upper housing 11 to move downward. The upper housing 11 drives the sealing plate 14 to move downward. The upper housing 11 drives the spring 18 to move downward. The spring 18 drives the support block 13 to move downward. During the downward movement, the lower end face of the support block 13 contacts the upper end face of the lifting block 12. Continue to turn the handwheel 3. The upper housing 11 continues to drive the support block 13 to move downward. The lifting block 12 presses against the support block 13, preventing the support block 13 from moving downward. The lifting block 12 exerts its force on the support block. The upward reaction force of 13 compresses the spring 18, causing the spring 18 to move upward relative to the sealing plate 14. When the lower end of the sealing plate 14 engages with the fixing groove of the lower housing 10, the handwheel 3 cannot be rotated. The two wedge surfaces of the support block 13 are in contact with the side of the two sealing plates 14 that are close to each other. The upward reaction force generates a horizontal component force on the two wedge surfaces of the support block 13. The horizontal component force pushes the sealing block 14 to press the sealing ring 15, thereby closing the gate valve. The two independent sealing plates improve the sealing reliability of the gate valve.

[0026] Rotating the handwheel 3 in the opposite direction causes the valve stem 5 to rise via a threaded drive. The valve stem 5 then moves the upper housing 11 upward, which in turn moves the sealing plate 14 upward. The upper housing 11 then moves the spring 18 upward, which in turn moves the support block 13 upward. As the support block 13 moves upward, the reaction force generated by the lifting block 12 gradually decreases, and the spring 18 gradually releases its accumulated elastic potential energy. This elastic potential energy causes the support block 13 to reset, and the sealing plate 14 separates from the sealing ring 15. When the upper end face of the upper housing 11 contacts the lower end face of the lower valve cover 7, the handwheel 3 cannot rotate. At this time, the valve cavity is connected to the valve body flow channels 16 on both sides of the valve body 1, thus opening the gate valve.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hand-operated thin gate valve comprising a valve body (1) and a valve stem (5), characterized in that: The inside of the valve body (1) is provided with a valve cavity, the lower end of the valve rod (5) is fixedly installed with an upper shell (11), the upper shell (11) is placed in the valve cavity in the valve body (1), the two end sides of the upper shell (11) are attached to the surface of the valve cavity, the lower end of the upper shell (11) is provided with two parallel installation grooves, each installation groove is fixedly installed with a sealing plate (14), the side of the two sealing plates (14) close to each other is provided with a spring (18), the upper end of the spring (18) is fixedly installed with the lower end surface of the upper shell (11), and the lower end of the spring (18) is fixedly connected with a supporting block (13).

2. A manually operated thin gate valve according to claim 1, characterized in that: The bottom of the valve body (1) is fixedly installed with a base (9), and the upper end of the valve rod (5) is threadedly connected with a hand wheel (3).

3. A manually operated thin gate valve according to claim 2, wherein: The upper end of the base (9) is provided with a groove, and the upper sides of the base (9) are fixedly installed with lower shells (10), the sides of the two lower shells (10) close to each other are provided with jacking blocks (12), and the jacking blocks (12) are fixedly installed in the groove of the base (9).

4. A manually operated thin gate valve according to claim 1, wherein: Both sides of the valve cavity are provided with through holes (19), the through holes (19) are fixedly installed with valve body flow channels (16), one end of the valve body flow channel (16) away from the valve cavity is fixedly installed with an installation plate (4), and one end of the valve body flow channel (16) close to the valve cavity is fixedly installed with a sealing ring (15).

5. A manually operated thin gate valve according to claim 1, wherein: The upper end of the valve body (1) is fixedly installed with a lower valve cover (7), the upper end of the lower valve cover (7) is fixedly installed with a plurality of valve frames (2), the upper end of the valve frame (2) is fixedly installed with an upper valve cover (6), the upper end of the upper valve cover (6) is fixedly installed with a bearing seat (8), the bearing seat (8) is provided with a stepped groove, the stepped groove is fixedly installed with a bearing (17), and the bearing (17) is sleeved on the shaft of the valve rod (5).

6. A manually operated thin gate valve according to claim 3, wherein: The upper end of the lower shell (10) is provided with a fixed groove.

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