CN217842752U - Gate valve - Google Patents

Abstract

The utility model relates to a gate valve, include: a valve body; a valve stem; a pipeline; the circular truncated cone is positioned in the middle of the inside of the pipeline; the valve core is fixedly arranged at the bottom end of the valve rod; the circular truncated cone also comprises a groove, the groove is positioned in the center of the contact surface of the circular truncated cone and the valve core, and a certain gap is formed between the bottom of the groove and the bottom of the valve core; the valve core corresponds to the pipeline, and the valve core is matched with the circular truncated cone. Through the circular truncated cone structure, most impurities such as sludge and the like are blocked by the circular truncated cone when the pipeline works, cannot enter the middle of the circular truncated cone to damage the sealing property of the contact part of the circular truncated cone and the valve core, and the sealing property of the gate valve is improved; the setting of recess makes the gate valve be in when closed condition, and the clearance can hold the impurity that a small amount of fell into between case and the round platform center, leaves the leakproofness that can prevent to destroy round platform and case contact department when a small amount of impurity falls into on the round platform, can improve the leakproofness of gate valve.

Description

a gate valve

technical field

The utility model relates to the technical field of valves, in particular to a gate valve.

Background technique

The gate valve is a gate of the opening and closing part. The direction of movement of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve is sealed by the contact between the valve seat and the gate plate. Usually, the sealing surface will be surfacing with metal materials to increase wear resistance, such as surfacing welding 1Cr13, STL6, stainless steel, etc. There are rigid gate valves and elastic gate valves. According to the different gate valves, gate valves are divided into rigid gate valves and elastic gate valves.

In the prior art, Chinese patent CN204852410U discloses a gate valve, including a valve body, a valve cover, a valve seat and a valve plate assembly, the valve cover is installed on the top of the valve body by bolts, and an upper chamber is provided on the upper part , the lower part of the valve body is provided with a flow channel for fluid communication, the valve seat is arranged in the flow channel, the valve seat is provided with a valve plate groove matching with the valve plate assembly, and the valve plate assembly is set In the groove of the valve plate, the valve stem penetrates into the upper chamber from the valve cover, and the valve stem and the valve cover are sealed by a sealing structure, and the lower end of the valve stem is connected with the upper part of the valve stem assembly, and it is characterized in that: the valve plate assembly It includes a left valve plate, a right valve plate, a valve plate sleeve, a fixed ring, a clip sleeve and an elastic metal ring with an opening. The left valve plate and the right valve plate are symmetrically arranged and wedge-shaped. The left valve plate and the right valve plate An accommodating cavity is opened on the opposite surface of the valve plate, the elastic metal ring is arranged in the accommodating cavity and is set against the inner wall of the accommodating cavity, the opening of the elastic metal ring is upward, the left valve plate and the right valve There is a step on the inner side of the upper end of the plate, the lower end of the valve plate sleeve is provided with an inner groove matching the step, the lower ends of the left valve plate and the right valve plate are respectively provided with protrusions, and the snap-fit sleeve There are grooves matched with the protrusions, and the protrusions are snapped into the clamping sleeves, and the upper ends of the left valve plate and the right valve plate are fixed by fixing rings.

In the above-mentioned patents, after the gate valve is operated, debris such as sand, iron filings, and dust will be left inside the pipeline and deposited in the groove of the diversion pipeline. When the gate valve is from the open state to the closed state, the flow of Impurities carried in the water flow will begin to sink. If they fall on the contact between the valve core and the pipeline in the closed state, it is easy to damage the sealing of the pipeline and cause the gate valve to fail to close tightly and leak, which is prone to safety accidents.

Utility model content

Aiming at the deficiencies in the prior art, the purpose of this utility model is to provide a gate valve to solve the above technical problems.

The technical scheme of the utility model is realized in the following way: a round table, the round table is located in the middle of the pipeline; a valve core, the valve core is fixed at the bottom end of the valve stem; the round table also includes a groove, and the groove is located on the round table There is a certain gap between the center of the contact surface of the spool and the bottom of the groove and the bottom of the spool; wherein, the spool corresponds to the pipe, and the spool matches the round table.

By adopting the above technical scheme and the structure of the round table, most of the impurities such as silt are blocked by the round table when the pipeline is working, and will not enter the middle of the round table to damage the sealing of the contact between the round table and the valve core, which improves the sealing of the gate valve; the groove When the gate valve is in the closed state, the gap between the spool and the center of the round table can accommodate a small amount of falling impurities, leaving a gap that can prevent the contact between the round table and the valve core from being damaged when a small amount of impurities fall on the round table. It can improve the sealing performance of the gate valve.

The utility model is further configured as: a brush, and the brush is fixed on the surface of the round platform on the side of the inlet end and the valve core.

By adopting the above technical scheme, the setting of the brush can absorb or block some suspended impurities that sink due to the decrease of the flow rate when the valve body is from opening to closing, so that the impurities are blocked on the side of the round table or absorbed by the brush, and the suspension is avoided as much as possible. Impurities enter the groove, thereby destroying the sealing performance between the valve core and the round table, and improving the sealing performance of the valve body.

The utility model is further configured that the valve core also includes: a left valve plate, the bottom end of the left valve plate also has a left arc groove, and an internal thread is arranged in the left arc groove; a right valve plate, the right The bottom of the valve plate also has a right arc groove, which is provided with an internal thread; the valve plate sleeve, the valve plate sleeve is provided with a stepped groove, and the stepped groove is used to connect the left valve plate and the right Valve plate, the middle of the valve plate cover is also provided with a threaded hole; fixed rod, the two ends of the fixed rod are provided with external threads; wherein, the threaded hole of the valve plate cover is threadedly connected with the external thread of the fixed rod, The left arc groove and the right arc groove may form an annular groove.

By adopting the above technical scheme, the valve core includes the left and right valve plates, and the double valve plates prevent the valve plates from being worn after a long period of use, so that the inclination of the valve plate or the sealing slope changes, and then the sealing effect is greatly reduced. The setting is to fix the left valve plate and the right valve plate, and the fixing rod is threaded to connect the valve plate sleeve and the round head. There is an external thread on the round head, and the external thread is threaded with the annular groove formed after the left valve plate and the right valve plate are connected. The above settings improve the service life of the valve core and the stability of the installation, and fix the rod and the valve plate The threaded connection between the sleeves improves the convenience of parts processing and maintenance assembly.

The utility model is further set as: the valve core also includes: a round head, the round head is located at the bottom of the valve core, and the flat end of the round head is also provided with external thread and threaded hole; wherein, the threaded hole of the round head is connected with the One fixed end is connected, and the external thread of the round head is threadedly engaged with the left arc groove of the left valve plate and the right arc groove of the right valve plate.

By adopting the above technical scheme, one side of the round head set at the bottom of the valve core is hemispherical and in direct contact with the round table, and the other side is provided with external threads and threaded holes, and the external threads form an annular groove formed by the left valve plate and the right valve plate. Thread connection is carried out, and the internal thread is connected through the threads on both ends of the fixed rod to improve the stability of the connection and the convenience of parts production.

The utility model is further set as: a limit boss, the limit boss is located in the middle of the valve stem and is circular; a limit groove, the limit groove is located in the valve body and has the same shape as the limit boss. Corresponding.

By adopting the above technical scheme, the limiting boss is set on the middle section of the valve stem, and the middle section of the valve body also has a limiting groove matching the limiting boss. The cooperation between the limiting protrusion and the limiting groove can Axial positioning is performed to stabilize the connection.

The utility model is further configured as follows: a set nut, the set nut is provided with an internal thread, and the set nut is located on the upper part of the valve body; the packing is located between the top of the valve body and the valve stem; wherein , the outside of the top of the valve body is provided with an external thread that is threadedly engaged with the set nut.

By adopting the above technical solution, the valve stem protrudes from the valve body and is compressed with a set nut, and the gap between the valve body and the valve stem is filled with packing. Avoiding the use of a pressure ring here can save costs and improve the sealing performance of the gate valve.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Fig. 1 is the three-dimensional schematic diagram of the gate valve of the embodiment of the present utility model;

Fig. 2 is a side view of a gate valve according to a specific embodiment of the present invention;

Fig. 3 is a cross-sectional view at A-A of the gate valve according to the embodiment of the present invention;

Fig. 4 is the front view of the gate valve of the specific embodiment of the utility model;

Fig. 5 is an enlarged schematic diagram of gate valve B in the specific embodiment of the present invention.

Reference signs: 1, valve body; 11, round platform; 12, valve core; 13, pipeline; 14, valve stem; 21, groove; 22, brush; 31, left valve plate; 32, right valve plate; 33 , fixed rod; 34, gate cover; 35, left arc groove; 36, right arc groove; 37, stepped groove; 41, round head; 42, threaded column; 51, limit boss; 52, limit Groove; 61, set nut; 62, stuffing.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figures 1 to 5, the utility model discloses a gate valve, a round table 11, the round table 11 is located in the middle of the pipeline 13; a valve core 12, the valve core 12 is fixed at the bottom end of the valve stem 14; The round platform 11 also includes a groove 21, the groove 21 is located at the center of the contact surface between the round platform 11 and the valve core 12 and there is a certain gap between the bottom of the groove 21 and the bottom of the valve core 12; Correspondingly, the valve core 12 cooperates with the round platform 11 . Through the structure of the round table 11, most of the impurities such as silt are blocked by the round table 11 when the pipeline 13 is working, and will not enter the middle of the round table 11 to damage the sealing of the contact between the round table 11 and the valve core 12, and improve the sealing of the gate valve; the groove 21 is set so that when the gate valve is in the closed state, the gap between the valve core 12 and the center of the round platform 11 can accommodate a small amount of falling impurities, leaving a gap that can prevent the round platform 11 and valve core 12 from being damaged when a small amount of impurities fall on the round platform 11. The tightness of the contact can improve the tightness of the gate valve.

In the embodiment of the present utility model, the brush 22 is fixed on the surface of the round platform 11 and the valve core 12 at the side of the inlet end. The setting of the brush 22 can absorb or block some suspended impurities that sink due to the decrease of the flow rate when the valve body 1 is opened to closed, so that the impurities are blocked on the side of the round platform 11 or absorbed by the brush 22, and the suspended impurities are avoided as much as possible. In the groove 21, the sealing performance between the valve core 12 and the round table 11 is broken, and the sealing performance of the valve body 1 is improved.

In this utility model embodiment, the spool 12 also includes: a left valve plate 31, the bottom end of the left valve plate 31 also has a left arc-shaped groove 35, and an internal thread is arranged in the left arc-shaped groove 35; Valve plate 32, the bottom end of the right valve plate 32 also has a right arc groove 36, the inner thread is provided in the right arc groove 36; the valve plate cover, the valve plate cover is provided with a stepped groove 37, so The step groove 37 is used to connect the left valve plate 31 and the right valve plate 32, and a threaded hole is also provided in the middle of the valve plate sleeve; a fixed rod 33, and the two ends of the fixed rod 33 are provided with external threads; wherein, the The threaded hole of the valve plate cover is threadedly connected with the external thread of the fixed rod 33, and the left arc groove 35 and the right arc groove 36 can form an annular groove. The valve core 12 includes left and right valve plates 32. The double valve plates prevent the valve plates from wearing out after a long period of use, so that the inclination of the valve plate or the sealing slope changes, and then the sealing effect is greatly reduced. The setting of the valve plate sleeve is to The left valve plate 31 and the right valve plate 32 are fixed, and the fixed rod 33 is threaded to connect the valve plate sleeve and the round head 41 . The round head 41 is provided with an external thread, and the external thread is threaded with the annular groove formed after the connection of the left valve plate 31 and the right valve plate 32. The above settings have improved the service life of the valve core 12 and the stability of the installation, and are fixed The threaded connection between the rod 33 and the valve plate cover improves the convenience of parts processing and maintenance assembly.

In the embodiment of the present utility model, the valve core 12 also includes: a round head 41, the round head 41 is located at the bottom of the valve core 12, and the flat end of the round head 41 is also provided with external threads and threaded holes; wherein, the The threaded hole of the round head 41 is connected with the fixed end, and the external thread of the round head 41 is screwed with the left arc groove 35 of the left valve plate 31 and the right arc groove 36 of the right valve plate 32 . The round head 41 provided at the bottom of the spool 12 is hemispherical on one side and directly contacts the round table 11, and the other side is provided with external threads and threaded holes, and the external threads are in contact with the circular groove formed by the left valve plate 31 and the right valve plate 32. Threaded connection, the internal thread is connected through the threads on the two ends of the fixing rod 33 to improve the stability of the connection and the convenience of parts production.

In the embodiment of the present utility model, the limiting boss 51, the limiting boss 51 is located in the middle of the valve stem 14 and is circular; the limiting groove 52, the limiting groove 52 is located in the valve body 1 and Corresponding to the shape of the limiting boss 51 . The limiting boss 51 is arranged on the middle section of the valve stem 14, and the middle section of the valve body 1 also has a limiting groove 52 matched with the limiting boss 51. 14 for axial positioning to achieve a connection stability.

In the embodiment of the present utility model, the tightening nut 61, the tightening nut 61 is provided with an internal thread, and the tightening nut 61 is located on the upper part of the valve body 1; the stuffing is located at the top of the valve body 1 and Between the valve rods 14 ; wherein, the outer top of the valve body 1 is provided with an external thread that is threadedly engaged with the set nut 61 . The place where the valve stem 14 protrudes from the valve body 1 is compressed with a set nut 61, and the gap between the valve body 1 and the valve stem 14 is filled with filler. Avoiding the use of a pressure ring here can save costs and improve the sealing performance of the gate valve.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (6)

1. A gate valve, comprising:

a valve body (1);

a valve stem (14);

a duct (13);

it is characterized by also comprising:

the round platform (11), the round platform (11) is positioned in the middle of the inner part of the pipeline (13), and the round platform (11) is cylindrical;

the valve core (12), the said valve core (12) is fixed to the bottom end of the valve stem (14);

the groove (21) is positioned in the center of the contact surface of the circular truncated cone (11) and the valve core (12), and a certain gap is formed between the bottom of the groove (21) and the bottom of the valve core (12);

the valve core (12) corresponds to the pipeline (13), and the valve core (12) is matched with the circular truncated cone (11).

2. A gate valve according to claim 1, further comprising:

the brush (22), the brush (22) sets firmly on one side round platform (11) of entry end and case (12) surface.

3. A gate valve according to claim 1, characterized in that the spool (12) further comprises:

the valve comprises a left valve plate (31), wherein the bottom end of the left valve plate (31) is provided with a left arc-shaped groove (35), and an internal thread is arranged in the left arc-shaped groove (35);

the valve comprises a right valve plate (32), wherein the bottom end of the right valve plate (32) is provided with a right arc-shaped groove (36), and an internal thread is arranged in the right arc-shaped groove (36);

the valve plate sleeve (34), the valve plate sleeve (34) is provided with a stepped groove (37), the stepped groove (37) is used for connecting the left valve plate (31) and the right valve plate (32), and the middle of the valve plate sleeve (34) is also provided with a threaded hole;

the fixing rod (33), both ends of the said fixing rod (33) have external screw thread;

the valve plate sleeve is characterized in that a threaded hole of the valve plate sleeve (34) is in threaded connection with an external thread at one end of the fixing rod (33), and the left arc-shaped groove (35) and the right arc-shaped groove (36) can form an annular groove.

4. A gate valve according to claim 3, characterized in that the spool (12) further comprises:

the round head (41), the round head (41) is positioned at the bottom of the valve core (12), and a threaded column (42) and a threaded hole are further formed in the plane end of the round head (41);

the threaded hole of the round head (41) is connected with one end of the fixing rod (33), and the threaded column (42) of the round head (41) is in threaded fit with the left arc-shaped groove (35) of the left valve plate (31) and the right arc-shaped groove (36) of the right valve plate (32).

5. The gate valve of claim 1, further comprising:

the limiting boss (51), the limiting boss (51) is located in the middle of the valve rod (14) and is annular;

the limiting groove (52) is located in the valve body (1) and corresponds to the limiting boss (51) in shape.

6. A gate valve according to claim 1, characterised in that:

the valve body (1) is provided with a valve seat, and the valve seat is provided with a valve seat;

the packing (62), the packing (62) is located between the top of the inner side of the valve body (1) and the valve rod (14);

wherein, the outer side of the top end of the valve body (1) is provided with an external thread which is in threaded fit with the fastening nut (61).

Images