Gate valve rod

Abstract

The utility model relates to the technical field of valve rods, in particular to a gate valve rod which comprises a valve rod portion, the valve rod portion comprises a middle rod body, the top end of the middle rod body is fixedly connected with an upper rod body, and the bottom end of the middle rod body is fixedly connected with a lower rod body. Threaded connection with a gate valve seat is achieved through the external threads on the surface of the upper rod body, the protruding block at the bottom end of the lower rod body is clamped in a gate plate of a gate valve, and therefore when the hand wheel is rotated to drive the valve rod part to move up and down, the gate plate can be driven to move up and down to achieve control over medium flowing, and under the elastic force effect of the spring, the sliding sleeve has flexibility. In the process that the valve rod part moves up and down, the sliding sleeve is always attached to the upper surface of the valve seat of the gate valve, so that the lantern ring and the sliding sleeve jointly cover the valve rod part to protect the valve rod part, pollutants such as dust or fibers are prevented from falling on the valve rod part, the situation that the pollutants enter the gate valve is prevented, the gate valve is prevented from being damaged, and the service life of the gate valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valve stems, and specifically relates to a gate valve stem. Background Art

[0002] A gate valve is a shut-off piece, i.e., a gate plate. The moving direction of the gate plate is perpendicular to the fluid direction. The gate valve seals by the contact between the valve seat and the gate plate. The gate valve stem is one of the key components of the gate valve and plays an important role in the opening and closing process of the gate valve; the valve stem is a component connecting the handwheel and the gate plate. By rotating or lifting the valve stem, the gate plate is driven to move up and down, thereby controlling the flow of the medium.

[0003] After the existing gate valve stem is installed, usually part of the rod body is exposed outside. Pollutants such as dust or fibers will fall on the exposed threaded section. When the valve body is closed, these pollutants will be transferred into the valve body along with the valve stem, damaging the gate valve, causing the gate valve to jam, and reducing the service life of the gate valve; for this reason, a gate valve stem is proposed. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a gate valve stem to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A gate valve stem, including a valve stem part. The valve stem part includes a middle rod body. The top end of the middle rod body is fixedly connected with an upper rod body, and the bottom end of the middle rod body is fixedly connected with a lower rod body. The outer side wall of the upper rod body is provided with an external thread for threaded connection with the gate valve seat. The bottom end of the lower rod body is fixedly connected with a convex block. The top end of the upper rod body is fixedly connected with a connecting block. The outside of the connecting block is provided with a connecting part. The outside of the upper rod body is provided with a protection mechanism.

[0006] The protection mechanism includes a circular plate. The inner side wall of the circular plate is fixedly connected to the bottom of the outer side wall of the connecting block. The lower surface of the circular plate is fixedly connected with a circular seat. The bottom of the circular seat is connected with a sleeve ring. The outer side wall of the sleeve ring is slidably connected with a sliding sleeve. A spring is uniformly fixedly connected between the bottom of the sleeve ring and the inner bottom wall of the sliding sleeve. The connecting part includes a handwheel, and the handwheel is connected to the outer side wall of the connecting block.

[0007] As a further preference of this technical solution: The outer side wall of the handwheel is threadedly connected with a pin rod, and a pin hole is opened on the left side wall of the connecting block.

[0008] As a further preference of this technical solution: The left end of the pin rod is fixedly connected with a knob.

[0009] As a further preference of this technical solution: The top of the sleeve ring is fixedly connected with a threaded ring.

[0010] As a further preference of this technical solution: an internal thread groove is provided on the lower surface of the round seat, and the outer side wall of the thread ring is threadedly connected to the inner side wall of the internal thread groove.

[0011] As a further preference of this technical solution: a ring body is fixedly connected to the bottom of the sliding sleeve, and the bottom of the ring body is a semi-circular smooth curved surface.

[0012] Compared with the prior art, the beneficial effects of the present utility model are:

[0013] The present utility model realizes threaded connection with the valve seat of the gate valve through the external thread on the surface of the upper rod body, and the convex block at the bottom end of the lower rod body is stuck in the gate plate of the gate valve. In this way, when the handwheel is rotated to drive the valve stem part to move up and down, the gate plate can be driven to move up and down to control the flow of the medium. Under the elastic force of the spring, the sliding sleeve has elasticity. During the up and down movement of the valve stem part, the sliding sleeve always fits the upper surface of the gate valve seat. In this way, the collar and the sliding sleeve together cover the valve stem part to protect it, preventing dust, fibers and other pollutants from falling on the valve stem part, preventing pollutants from entering the gate valve, avoiding damage to the gate valve, and improving the service life of the gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the front view structural schematic diagram of the present utility model;

[0015] Figure 2 is the left view structural schematic diagram of the present utility model;

[0016] Figure 3 is the partial sectional view structural schematic diagram of the present utility model;

[0017] Figure 4 is the structural schematic diagram of the lower rod body and the convex block of the present utility model;

[0018] Figure 5 is the structural schematic diagram of the collar and the sliding sleeve of the present utility model;

[0019] Figure 6 is the structural schematic diagram of the upper rod body and the external thread of the present utility model;

[0020] Figure 7 is the structural schematic diagram of the round seat and the internal thread groove of the present utility model.

[0021] In the figure:

[0022] 1, valve stem part; 2, connecting part; 3, protection mechanism;

[0023] 10, middle rod body; 11, upper rod body; 12, lower rod body; 13, external thread; 14, convex block; 15, connecting block;

[0024] 21. Handwheel; 22. Pin rod; 23. Pin hole; 24. Knob;

[0025] 31. Circular plate; 32. Circular seat; 33. Internal thread groove; 34. Thread ring; 35. Collar; 36. Slide sleeve; 37. Spring; 38. Ring body. Detailed implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", and "set" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0028] Please refer to Figures 1-7 , the present invention provides a technical solution: a gate valve stem, including a valve stem part 1. The valve stem part 1 includes a middle rod body 10. The top end of the middle rod body 10 is fixedly connected to an upper rod body 11, and the bottom end of the middle rod body 10 is fixedly connected to a lower rod body 12. An external thread 13 for threaded connection with the gate valve seat is provided on the outer side wall of the upper rod body 11. The bottom end of the lower rod body 12 is fixedly connected to a convex block 14, and the top end of the upper rod body 11 is fixedly connected to a connection block 15. A connection part 2 is provided outside the connection block 15, and a protection mechanism 3 is provided outside the upper rod body 11; the convex block 14 corresponds to the groove on the gate plate and can drive the gate plate to move up and down when the valve stem moves up and down to control the flow of the medium;

[0029] The protection mechanism 3 includes a circular plate 31. The inner side wall of the circular plate 31 is fixedly connected to the bottom of the outer side wall of the connecting block 15. A circular base 32 is fixedly connected to the lower surface of the circular plate 31. A collar 35 is connected to the bottom of the circular base 32. The outer side wall of the collar 35 is slidably connected to a sliding sleeve 36. A spring 37 is uniformly fixedly connected between the bottom of the collar 35 and the inner bottom wall of the sliding sleeve 36. The connecting part 2 includes a handwheel 21, and the handwheel 21 is connected to the outer side wall of the connecting block 15.

[0030] Under the above settings, the threaded connection with the gate valve seat is achieved through the external thread 13 on the surface of the upper rod body 11. The convex block 14 at the bottom end of the lower rod body 12 is stuck in the gate plate of the gate valve. In this way, when the handwheel 21 is rotated to drive the valve stem part 1 to move up and down, the gate plate can be driven to move up and down to control the flow of the medium. Under the elastic force of the spring 37, the sliding sleeve 36 is elastic. During the up and down movement of the valve stem part 1, the sliding sleeve 36 always fits the upper surface of the gate valve seat. In this way, the collar 35 and the sliding sleeve 36 together enclose and protect the valve stem part 1 inside, preventing contaminants such as dust or fibers from falling on the valve stem part 1.

[0031] In this embodiment, specifically: a pin rod 22 is threadedly connected to the outer side wall of the handwheel 21, and a pin hole 23 is formed in the left side wall of the connecting block 15; rotating the pin rod 22 clockwise to insert it into the pin hole 23 can lock the handwheel 21, and unscrewing the pin rod 22 to release the lock facilitates removing the handwheel 21.

[0032] In this embodiment, specifically: a knob 24 is fixedly connected to the left end of the pin rod 22; it is convenient to rotate the pin rod 22.

[0033] In this embodiment, specifically: a threaded ring 34 is fixedly connected to the top of the collar 35; it is convenient for the threaded ring 34 to move synchronously with the collar 35.

[0034] In this embodiment, specifically: an internal thread groove 33 is formed in the lower surface of the circular base 32, and the outer side wall of the threaded ring 34 is threadedly connected to the inner side wall of the internal thread groove 33; it is convenient to achieve a flexible connection between the collar 35 and the circular plate 31.

[0035] In this embodiment, specifically: a ring body 38 is fixedly connected to the bottom of the sliding sleeve 36, and the bottom of the ring body 38 is a semi-circular smooth curved surface; the smooth curved surface at the bottom of the ring body 38 can reduce the friction between the sliding sleeve 36 and the gate valve seat.

[0036] The working principle of the present utility model is as follows: The external thread 13 on the surface of the upper rod body 11 is used to achieve threaded connection with the valve seat of the gate valve. The convex block 14 at the bottom end of the lower rod body 12 is stuck in the gate plate of the gate valve. In this way, when the handwheel 21 is rotated to drive the valve stem portion 1 to move up and down, the gate plate can be driven to move up and down to control the flow of the medium. Under the elastic force of the spring 37, the sliding sleeve 36 has elasticity. During the up and down movement of the valve stem portion 1, the sliding sleeve 36 always fits the upper surface of the gate valve seat. In this way, the collar 35 and the sliding sleeve 36 together cover and protect the valve stem portion 1 inside, preventing pollutants such as dust or fibers from falling on the valve stem portion 1, preventing the situation of pollutants entering the inside of the gate valve, avoiding damage to the gate valve, and improving the service life of the gate valve.

[0037] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A gate valve stem, characterized in that: It includes a valve stem part (1), and the valve stem part (1) includes a middle rod body (10). The top end of the middle rod body (10) is fixedly connected to an upper rod body (11), and the bottom end of the middle rod body (10) is fixedly connected to a lower rod body (12). An external thread (13) for threaded connection with the gate valve seat is provided on the outer side wall of the upper rod body (11). A convex block (14) is fixedly connected to the bottom end of the lower rod body (12), and a connection block (15) is fixedly connected to the top end of the upper rod body (11). A connection part (2) is provided outside the connection block (15), and a protection mechanism (3) is provided outside the upper rod body (11). The protection mechanism (3) includes a circular plate (31). The inner side wall of the circular plate (31) is fixedly connected to the bottom of the outer side wall of the connection block (15). A circular seat (32) is fixedly connected to the lower surface of the circular plate (31). A collar (35) is connected to the bottom of the circular seat (32). A sliding sleeve (36) is slidably connected to the outer side wall of the collar (35). Springs (37) are uniformly fixedly connected between the bottom of the collar (35) and the inner bottom wall of the sliding sleeve (36). The connection part (2) includes a handwheel (21), and the handwheel (21) is connected to the outer side wall of the connection block (15).

2. The gate valve stem according to claim 1, characterized in that: A pin rod (22) is threadedly connected to the outer side wall of the handwheel (21), and a pin hole (23) is formed in the left side wall of the connection block (15).

3. The gate valve stem according to claim 2, characterized in that: A knob (24) is fixedly connected to the left end of the pin rod (22).

4. The gate valve stem according to claim 3, characterized in that: A threaded ring (34) is fixedly connected to the top of the collar (35).

5. The gate valve stem according to claim 4, characterized in that: An internal thread groove (33) is formed in the lower surface of the circular seat (32), and the outer side wall of the threaded ring (34) is threadedly connected to the inner side wall of the internal thread groove (33).

6. The gate valve stem according to claim 5, wherein: A ring body (38) is fixedly connected to the bottom of the sliding sleeve (36), and the bottom of the ring body (38) is a semi-circular smooth curved surface.

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