CN110252600A - A high pressure glued valve body - Google Patents

Abstract

The invention discloses a high-pressure gluing valve body, which belongs to the technical field of gluing valves. It includes a valve casing, a valve cover, a valve core, a valve needle, a nozzle and a connecting assembly. The valve casing has a guide cavity, the valve core is located in the guide cavity, and the peripheral surface of the valve core is slidingly sealed with the guide cavity wall. . By cooperating with the valve needle and the guide tube, under the same glue supply condition, moving the valve needle to change the relative position between it and the guide tube can adjust the size of the glue channel formed between the two, thus Change the spraying pressure and speed of the glue. During the closing process of the valve body, the front end of the valve needle and the front end of the guide tube are close to each other until the two are completely attached. No glue dripping or stringing.

Description

A high pressure glued valve body

technical field

The invention relates to a high-pressure gluing valve body, which belongs to the technical field of gluing valves.

Background technique

The glue applicator valve is a flow control tool for glue coating. When the existing glue applicator valve is in the closed state, there is still residual glue flowing out of the valve body, and glue dripping or wire drawing will occur, and the glue liquid cannot be adjusted. Adjust the ejection pressure and speed.

Contents of the invention

The technical problem to be solved by the present invention is to provide a high-pressure glue-applying valve body, through which the valve needle cooperates with the guide tube, and under the same glue supply condition, the valve needle can be moved to change the relative distance between it and the guide tube. Position, the size of the glue channel formed between the two can be adjusted, thereby changing the spraying pressure and speed of the glue. During the closing process of the valve body, the front end of the valve needle is close to the front end of the guide tube until the two are completely fitted. , It can effectively discharge the remaining glue during the closing process, so as to ensure that there is no glue dripping and drawing after closing.

The technical problem to be solved by the present invention takes the following technical solutions to realize:

A high-pressure glue-applied valve body, including a valve housing, a valve cover, a valve core, a valve needle, a nozzle and a connecting assembly, the valve housing has a guide cavity, the valve core is located in the guide cavity and the valve core is surrounded by The surface is slidingly sealed with the wall of the guide cavity, the valve body is covered on the valve casing, and the valve cover is screwed with an adjusting stud whose front end extends into the guide cavity, the connecting assembly includes a connecting seat and a flow guide tube, The connection seat is fixed on the lower end of the valve housing, and there is an L-shaped injection cavity extending from one side of the connection seat to the bottom surface of the connection seat. The injection cavity is connected, the inner diameter of the guide tube decreases from top to bottom, the nozzle is fixed to the end of the guide tube, one end of the valve needle is fixed to the bottom of the valve core, and the other end extends from the valve housing and the connecting seat to the guide tube. In the flow pipe, a sliding seal is formed between the valve needle, the valve casing and the connecting seat. The front end of the valve needle is a conical structure. The nozzle has a liquid outlet channel that matches the front end of the valve needle. Each part is provided with a trachea joint communicating with the guide cavity.

By adopting the above technical scheme, when in use, connect the two air pipe joints to the air station to change the air pressure in the upper and lower parts of the guide chamber so that the valve core is in a suitable position, and the adjustment stud can change the maximum rising position of the valve core, thereby controlling the maximum glue output. Adjust the flow rate, the inner diameter of the guide tube decreases to form a tapered structure, the back pressure is small, and the glue flow is smoother. When the valve body is closed, the valve needle moves forward to reduce the distance between it and the guide tube The material liquid is completely squeezed out until the front end of the valve needle fits the nozzle to form a seal, avoiding glue dripping and wire drawing after closing.

As a preferred example, the side of the valve housing has a high-pressure joint communicating with the L-shaped injection cavity, an injection pipe is connected to the high-pressure joint, and a ball valve is arranged on the injection pipe.

As a preferred example, a fixing bracket is fixed outside the valve casing.

As a preferred example, the valve casing and the connecting seat have passages for the valve needle to protrude from, and sealing seats and/or sealing packings are provided in the passages.

As a preferred example, the upper end of the valve needle protrudes from the upper end of the valve core, the valve needle has a limit platform abutting against the lower end surface of the valve core, and the upper end of the valve needle is locked by a nut.

The beneficial effects of the present invention are: through the cooperation of the valve needle and the guide tube, under the condition of the same glue supply, the valve needle is moved to change the relative position between it and the guide tube, and the glue formed between the two can be adjusted. Adjust the size of the liquid channel to change the spray pressure and speed of the glue. During the closing process of the valve body, the front end of the valve needle and the front end of the guide tube are close to each other until the two are completely attached, and the remaining glue can be effectively discharged during the closing process. Liquid, so as to ensure that after closing and no glue dripping and drawing.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a perspective view of the present invention.

In the figure: valve housing 1, valve cover 2, valve core 3, valve needle 4, nozzle 5, guide cavity 6, adjusting stud 7, connecting seat 8, guide tube 9, L-shaped injection cavity 10, air pipe joint 11, High-pressure connector 12, injection pipe 13, ball valve 14, fixed bracket 15.

Detailed ways

In order to easily understand the technical means, creative features, goals and effects of the present invention, the present invention will be further described below in conjunction with specific illustrations.

As shown in Figure 1 and Figure 2, a high-pressure glue-applied valve body includes a valve housing 1, a valve cover 2, a valve core 3, a valve needle 4, a nozzle 5 and a connecting assembly, and the valve housing 1 has a guide cavity 6. The valve core 3 is located in the guide chamber 6 and the peripheral surface of the valve core 3 is slidingly sealed with the wall of the guide chamber 6. The valve body is covered on the valve housing 1, and a front end is screwed on the valve cover 2 The adjusting stud 7 protruding into the guide cavity 6, the connecting assembly includes a connecting seat 8 and a guide tube 9, the connecting seat 8 is fixed at the lower end of the valve housing 1, and there is a side surface of the connecting seat 8 in the connecting seat 8 Extending to the L-shaped injection chamber 10 on its bottom surface, the guide tube 9 is fixed to the bottom end of the connecting seat 8 and the guide tube 9 communicates with the L-shaped injection cavity 10, and the inner diameter of the guide tube 9 decreases from top to bottom , the nozzle 5 is fixed to the end of the guide tube 9, one end of the valve needle 4 is fixed to the bottom of the valve core 3, and the other end protrudes from the valve housing 1 and the connecting seat 8 into the guide tube 9 and the valve needle 4 forms a sliding seal with the valve housing 1 and the connecting seat 8. The front end of the valve needle 4 is a conical structure. The nozzle 5 has a liquid outlet channel that matches the front end of the valve needle 4. The valve housing 1 The upper and lower parts are respectively provided with a trachea joint 11 communicating with the guide cavity 6 .

Further, the side of the valve housing 1 has a high-pressure joint 12 communicating with the L-shaped injection cavity 10 , the high-pressure joint 12 is connected with an injection pipe 13 , and the injection pipe 13 is provided with a ball valve 14 .

Further, a fixing bracket 15 is fixed on the outside of the valve casing 1 .

Further, the valve casing 1 and the connecting seat 8 have passages for the valve needle 4 to protrude from, and the passages are provided with sealing seats or sealing grooves and filled with sealing packing, or adopt two methods at the same time , It can also adopt the matching method of sealing groove and sealing ring.

A pressure gauge is also arranged on the valve housing.

Further, the upper end of the valve needle 4 protrudes from the upper end of the valve core 3, and the valve needle 4 has a limit platform abutting against the lower end surface of the valve core 3, and the upper end of the valve needle 4 is locked by a nut.

By cooperating with the valve needle 4 and the guide tube 9, under the condition of the same glue supply, moving the valve needle 4 to change the relative position between it and the guide tube 9 can adjust the size of the glue channel formed between the two. Adjust to change the spray pressure and speed of the glue. During the closing process of the valve body, the front end of the valve needle 4 is close to the front end of the guide tube 9 until the two are completely attached, and the remaining glue can be effectively discharged during the closing process. , so as to ensure that there is no glue dripping and drawing after closing.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above-described embodiments, and that the present invention also has various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements all fall into the scope of the present invention. within the scope of protection. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. A high-pressure glue-applied valve body, characterized in that: comprise valve casing, bonnet, spool, valve needle, nozzle and connection assembly, have a guide cavity in the described valve casing, and described spool is positioned at described guide In the cavity and the peripheral surface of the valve core is slidably sealed with the wall of the guide cavity. The valve body is covered on the valve casing. An adjusting stud whose front end extends into the guide cavity is screwed on the valve cover. The connecting assembly includes a connecting A seat and a flow guide tube, the connection seat is fixed at the lower end of the valve housing, and there is an L-shaped injection cavity extending from one side of the connection seat to its bottom surface in the connection seat, and the flow guide tube is fixed to the bottom end of the connection seat and conducts flow The tube is connected with the L-shaped injection cavity, the inner diameter of the guide tube decreases from top to bottom, the nozzle is fixed to the end of the guide tube, one end of the valve needle is fixed to the bottom of the valve core, and the other end is connected from the valve housing and the connecting seat. It protrudes into the guide tube and forms a sliding seal between the valve needle, the valve housing and the connecting seat. The front end of the valve needle is a cone structure, and the nozzle has a liquid outlet channel that matches the front end of the valve needle. The upper and lower parts of the valve housing are respectively provided with a trachea joint communicating with the guide cavity. 2. a kind of high-pressure glue-applied valve body according to claim 1, it is characterized in that: described valve housing side has a high-pressure joint that communicates with described L-type injection cavity, is connected with injection pipe on the described high-pressure joint, The injection pipe is provided with a ball valve. 3. A kind of high-pressure gluing valve body according to claim 1, is characterized in that: described valve housing outside also is fixed with a fixed support. 4. A kind of high-pressure glue-applied valve body according to claim 1, is characterized in that: described valve casing, described connecting seat have the passage that protrudes for described valve needle, are provided with sealing seat and/or in passage or sealing packing. 5. A kind of high-pressure glue-applied valve body according to claim 1, characterized in that: the upper end of the valve needle stretches out from the upper end of the valve core, and the valve needle has a limit platform abutting against the lower end surface of the valve core , the upper end of the valve needle is locked by a nut.