CN104061383A - Structure for connecting valve body with connector in steam heat valve - Google Patents

Abstract

The invention provides a structure for connecting a valve body with a connector in a steam heat valve, and belongs to the technical field of valves, wherein the structure solves the problem that insertion bending easily occurs when a movable connector and a valve body of an existing steam heat valve are connected. According to the structure, a cavity is formed inside the valve body, the valve body is provided with a connecting end communicated with the cavity, the structure comprises a connector inner end, a locking nut and an annular groove formed in the end face of the connecting end, the connector inner end is cylindrical, the connector inner end is inserted into the annular groove, the inner side of the locking nut is provided with a protruding blocking edge, the locking nut is connected with the connecting end in a threaded mode, the outer side of a connector outer end is provided with an annular protruding shoulder, and the blocking edge abuts against the annular protruding shoulder so that the connector inner end can be fixed in the annular groove in a sealed mode. The structure for connecting the valve body with the connector in the steam heat valve has the advantage that the connector can be stably inserted into the valve body.

Description

Connection structure between valve body and joint in heating valve

technical field

The invention belongs to the technical field of valves, and relates to a heating valve, in particular to a connection structure between a valve body and a joint in the heating valve.

Background technique

The automatic temperature control heating valve on the heating pipe is usually set in front of the inlet of the heating radiator. One end is connected to the heating radiator and the other end is connected to the heating pipe. There is a temperature bulb for automatic temperature control in the valve body. The temperature bulb expands and contracts according to the ambient temperature. The lower end of the telescopic part is connected with the valve stem of the valve through a transmission part or a transmission assembly. The automatic thermostatic heating valve uses the temperature sensing element in the temperature control valve head to control the valve lift.

Its working principle is that when the room temperature rises, the temperature-sensing element expands and compresses the valve stem to close the valve. It is an independently working temperature adjustment device composed of a heating valve and a thermostat. When the room temperature is lower than the set value of the thermostat, hot water flows into the radiator through the valve, so that the air in the room is heated until the set temperature value. At this time, the liquid in the thermostat will expand, causing the valve heat sheet to be pressed to the valve through the valve car, hot water will no longer flow into the radiator, and the air will no longer be heated. When the temperature of the room drops, the liquid in the detector contracts causing the valve to be opened again and the heating process starts again, thus the cycle is achieved to achieve constant temperature.

For example, a movable joint of a heating valve [Application No.: 201220392147.6; authorized announcement number: CN202733234U] proposed in Chinese patent documents, the valve body of the heating valve has a connecting pipe connected with its inner cavity, and the movable joint is located at the connecting pipe. The movable joint includes a lock cap and a connecting pipe, the lock cap is threadedly connected with the above-mentioned connecting pipe, and the inner side of the locking cap has a protruding retaining edge, the outside of the end of the above-mentioned connecting pipe has a protruding shoulder, and the port of the connecting pipe has an inclined The first contact surface, the end of the connecting pipe has a second contact surface matching the first contact surface, and the above-mentioned retaining edge abuts against the shoulder so that the first contact surface and the second contact surface are in close contact.

When the movable joint is used, it is necessary to firstly connect the connecting pipe with the connecting pipe through a large external force, and then fix the connecting pipe and the connecting pipe through the lock cap. Since the cooperation between the connecting pipe and the connecting pipe is realized through the close contact between the inclined contact surface 1 and the contact surface 2, in the process of connecting the contact surface 1 and the contact surface 2, the external force must always be concentrated in the same direction, if the external force The direction is deviated, which may cause the connecting pipe to bend, reduce the sealing performance of the connection between the first contact surface and the second contact surface, and cause water leakage.

Contents of the invention

The object of the present invention is to solve the above-mentioned problems in the existing technology, and propose a connection structure between the valve body and the joint in the heating valve, which solves the problem that the joint and the valve body in the prior art are easy to insert and bend.

The purpose of the present invention can be achieved through the following technical solutions: a connection structure between the valve body and the joint in the heating valve, the inside of the valve body is a cavity, and the valve body has a connection end communicating with the cavity, which is characterized in that the connection The structure includes the inner end of the joint, a lock nut and an annular groove on the end face of the connecting end. The inner end of the joint is cylindrical, and the inner end of the joint is inserted into the annular groove. The inner side of the lock nut has The protruding retaining edge and the locking nut are threadedly connected with the above-mentioned connecting end, the outside of the outer end of the joint has an annular shoulder, and the above-mentioned retaining edge abuts against the annular shoulder so that the inner end of the joint is sealed and fixed in the annular groove.

When the joint and the valve body are connected, since the end of the valve body has an annular groove, the inner end of the joint is cylindrical, so that the joint can be inserted more smoothly through the cooperation between the inner and outer walls of the inner end of the joint and the inner wall of the annular groove. In the valve body; when the joint is inserted into the annular groove by external force, even if the direction of the external force deviates, the joint can be stably inserted into the valve body and positioned in the valve body, and at this time, the inner and outer walls of the inner end of the joint and the annular groove The inner sidewalls are in tight contact, thereby forming a seal, improving the tightness of the connection between the joint and the valve body, and avoiding liquid leakage.

In the above connection structure between the valve body and the joint in the heating valve, a first sealing structure is provided between the inner side of the joint inner end and the inner side of the above-mentioned annular groove to make the connection and sealing of the two, and the first sealing structure includes An O-shaped sealing ring and the first groove at the inner end of the joint, the O-shaped sealing ring is located in the first groove and its inner peripheral surface abuts against the inner wall of the annular groove.

When the valve body flows into a liquid with a high temperature, the joint will expand, so that the connection between the inner side wall of the joint inner end and the inner side wall of the annular groove is not tight enough, and by setting the first sealing structure, the inner side wall of the inner end of the joint and the inner side wall of the annular groove are not tightly connected. The connection of the inner wall of the groove is always kept sealed; by setting the first groove, the installation of the O-shaped sealing ring 1 is facilitated; under the action of the O-shaped sealing ring 1, the connection between the contact surface 1 and the inner wall of the annular groove is always maintained seal.

In the connection structure between the valve body and the joint in the heating valve, a second sealing structure is provided between the outer side of the inner end of the joint and the inner side of the above-mentioned annular groove to seal the connection between the two, and the second sealing structure includes The second O-shaped sealing ring and the second groove at the inner end of the joint, the second O-shaped sealing ring is located in the second groove and its inner peripheral surface abuts against the inner wall of the annular groove.

When the valve body flows into a liquid with a lower temperature, the joint will shrink, so that the connection between the outer wall of the inner end of the joint and the inner wall of the annular groove is not tight enough, and by setting the second sealing structure, the outer wall of the inner end of the joint and the inner wall of the annular groove The connection of the inner wall of the groove is always kept sealed; by setting the second groove, the installation of the second O-ring is facilitated; under the action of the O-ring, the connection between the second contact surface and the inner wall of the annular groove is always kept sealed .

In the above connection structure between the valve body and the joint in the heating valve, the end of the above-mentioned annular shoulder close to the valve body has a sealing gasket that can seal the annular shoulder when it abuts against the valve body.

By setting the gasket, the connection between the outer end of the joint and the valve body is completely sealed, thereby further improving the sealing performance of the connection structure.

In the connection structure between the valve body and the joint in the heating valve, the sum of the thickness of the gasket and the depth of the annular groove is greater than the length of the inner end of the joint.

With this design, when the lock nut moves to the connection end, the retaining edge on the lock nut abuts against the annular shoulder so that the joint continues to move into the annular groove, and the gasket is in the contact between the annular shoulder and the end face of the connection end. Deformation occurs under extrusion, further improving the sealing effect between the joint and the connection end.

In the connection structure between the valve body and the joint in the heating valve, the thickness of the inner end of the joint is equal to the width of the annular groove.

The thickness of the inner end of the joint is equal to the width of the annular groove, so that when the inner end of the joint is inserted into the annular groove, the inner and outer sides of the inner end of the joint are respectively against the inner wall of the annular groove to form a seal. The deformation under the extrusion of the end and the annular groove makes the connection between the annular groove and the inner end of the joint more tight, and makes the connection between the joint and the valve body more reliable.

In the above connection structure between the valve body and the joint in the heating valve, the outer wall of the inner end of the joint also has an inwardly inclined tapered guide surface 1, and the tapered guide surface 1 extends to the inner end of the joint.

The inner end of the joint has an inclined tapered guide surface, that is, when the joint is just inserted into the annular groove, the thickness of the front end of the joint is smaller than the groove width of the annular groove, so that the joint can be inserted into the annular groove more easily; at the same time, the cone The shaped guide surface can play a guiding role, so that the joint can be inserted into the annular groove more conveniently.

In the connection structure between the valve body and the joint in the above-mentioned heating valve, the side wall used for the contact surface 1 in the above-mentioned annular groove has an inwardly inclined tapered guide surface 2, and the tapered guide surface 2 extends to the inlet. end of the end.

There is an inclined tapered guide surface 2 at the notch of the annular groove, so that the thickness of the front end of the joint is smaller than the groove width of the annular groove, making it easier for the joint to be inserted into the annular groove; at the same time, the tapered guide surface 2 can guide Function, so that the connector can be inserted into the annular groove more conveniently.

In the connection structure between the valve body and the joint in the heating valve, the joint is made of PPR material. PPR materials have the advantages of good toughness, high strength, excellent processing performance, and good creep resistance at relatively high temperatures.

Compared with the prior art, the connecting structure of the valve body and the joint in the heating valve has the following advantages:

1. Through the cooperation between the inner and outer walls of the inner end of the joint and the inner wall of the annular groove, the joint is more smoothly and conveniently connected with the valve body.

2. When the joint is inserted into the annular groove, no matter whether the direction of the external force changes, the joint can always be stably positioned in the annular groove, thereby improving the sealing performance of the joint and the valve body and avoiding liquid leakage.

3. The connection between the valve body and the joint is sealed by the four sealing structures of the inner side wall of the joint and the inner wall of the annular groove, the first sealing structure, the second sealing structure and the gasket connected to the annular shoulder. , Greatly improve the tightness of the joint and the valve body to avoid liquid leakage.

4. The sum of the thickness of the gasket and the depth of the above-mentioned annular groove is greater than the length of the inner end of the joint, so that the gasket is deformed under the extrusion of the annular shoulder and the end face of the connection end, further improving the sealing effect between the joint and the connection end .

Description of drawings

Fig. 1 is the cross-sectional structure schematic diagram of this connecting structure;

Fig. 2 is the sectional structure schematic diagram of valve body;

Fig. 3 is a schematic cross-sectional structure diagram of the joint.

In the figure, 1, valve body; 1a, connecting end; 1b, annular groove; 1c, tapered guide surface 2; 2, joint; 2a, tapered guide surface 1; 2b, first groove; 2c, second Groove; 2d, annular shoulder; 3, O-ring one; 4, O-ring two; 5, gasket; 6, lock nut; 6a, retaining edge.

Detailed ways

The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

As shown in Figure 1, in the connection structure between the valve body and the joint in the heating valve, the inside of the valve body 1 is a cavity, and one end of the valve body 1 has a connection end 1a communicating with the cavity, and the outside of the connection end 1a also has an external thread . The connection structure includes a joint 2, an annular groove 1b provided on the end surface of the connection end 1a, a locking nut 6 and the like.

Specifically, the inner end of the joint 2 is cylindrical and the inner end of the joint 2 is inserted into the annular groove 1b. In this embodiment, the thickness of the inner end of the joint 2 is the same as the width of the annular groove 1b, and when the joint 2 is connected to the connecting end 1a, the inner and outer walls of the inner end of the joint 2 are respectively closely abutted against the inner side wall of the annular groove 1b to form Sealing, while making the connection between the joint 2 and the annular groove 1b more stable.

For further optimization, as shown in Figures 2 and 3, the side wall in the annular groove 1b that is used for contacting the inner side wall of the joint 2 has an inwardly inclined tapered guide surface 1c, and the tapered guide surface 2 1c extends to The end of the connection end 1a; the outer wall of the inner end of the joint 2 has an inwardly inclined tapered guide surface 2a, and the tapered guide surface 2a extends to the inner end of the joint 2. With such a design, the joint 2 can be more easily inserted into the annular groove 1b.

As shown in Figure 1, a first sealing structure is provided between the inner side of the joint 2 and the inner wall of the annular groove 1b to make the connection and sealing of the two; between the outer side of the inner end of the joint 2 and the inner wall of the annular groove 1b The two are connected to a sealed second sealing structure.

Specifically, as shown in Fig. 1 and Fig. 3, the first sealing structure is a first groove 2b provided on the inner side wall of the inner end of the joint 2 and an O-ring-3, and the O-ring-3 is located at the first In a groove 2b and its inner peripheral surface abuts against the inner wall of the annular groove 1b. Naturally, the first sealing structure can also be only an O-ring, the inner peripheral surface of the O-ring abuts against the inner wall of the annular groove 1b, and the outer peripheral surface of the O-ring is in contact with the inner wall of the inner end of the joint 2 against each other.

The second sealing structure is a second groove 2c and an O-ring 24 provided on the outer wall of the inner end of the joint 2. The O-ring 24 is located in the second groove 2c and its inner peripheral surface is in contact with the annular groove The inner side walls of the groove 1b abut against each other. Naturally, the first sealing structure can also be only the second O-ring. against each other.

As shown in Figure 1, the O-ring deforms under the extrusion of the inner end of the joint 2 and the annular groove 1b, making the connection between the annular groove 1b and the inner end of the joint 2 tighter, and making the connection between the joint 2 and the valve body 1 more solid.

The outer wall of the outer end of the joint 2 has an annular shoulder 2d, and the end of the annular shoulder 2d close to the valve body 1 has a gasket 5 that can seal the annular shoulder 2d when it abuts against the valve body 1, and the lock nut 6 is connected At the other end of the annular shoulder 2d. Specifically, the sum of the thickness of the gasket 5 and the depth of the annular groove 1 b is greater than the length of the inner end of the joint 2 . There is a protruding stop edge 6a inside the lock nut 6. When the lock nut 6 moves to the connection end 1a, the stop edge 6a on the lock nut 6 abuts against the annular shoulder 2d so that the joint 2 continues to the annular groove 1b, the sealing gasket 5 is deformed under the extrusion of the annular shoulder 2d and the end surface of the connecting end 1a, further improving the sealing effect between the joint 2 and the connecting end 1a.

In this embodiment, the joint 2 is made of PPR material. PPR material has the advantages of good toughness, high strength, excellent processing performance, and good creep resistance at higher temperatures. Naturally, the joint 2 can also be made of brass material.

As shown in Figure 1, when installing, first insert the O-ring into the corresponding groove, and then insert the joint 2 into the valve body 1 by external force, and the lock nut 6 is inserted into the joint 2 and threaded with the valve body 1 To connect, rotate the lock nut 6 so that the retaining edge 6a inside the lock nut 6 is pressed against the annular shoulder 2d on the joint 2, so that the valve body 1 and the joint 2 press the gasket 5 tightly, and finally the joint 2 and the valve body 1 are firmly connected together.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Claims (9)

1. A connection structure between a valve body and a joint in a heating valve, the inside of the valve body (1) is a cavity, and the valve body (1) has a connection end (1a) communicating with the cavity, it is characterized in that the connection structure Including the inner end of the joint (2), the annular groove (1b) and the lock nut (6) set on the end surface of the connecting end (1a), the inner end of the joint (2) is cylindrical, and the joint (2) The inner end is inserted into the annular groove (1b), and the inner side of the lock nut (6) has a protruding retaining edge (6a) and the lock nut (6) is threadedly connected with the above-mentioned connecting end (1a), The outside of the outer end of the joint (2) has an annular shoulder (2d), and the above-mentioned retaining edge (6a) abuts against the annular shoulder (2d) so that the inner end of the joint (2) is sealed and fixed in the annular groove (1b). 2. The connection structure between the valve body and the joint in the heating valve according to claim 1, characterized in that, there are two inner sides between the inner end of the joint (2) and the inner side of the above-mentioned annular groove (1b). Or the first sealing structure that is connected to the seal, the first sealing structure includes O-ring one (3) and the first groove (2b) at the inner end of the joint (2), and the O-ring one (3) is located In the first groove (2b) and its inner peripheral surface abuts against the inner wall of the annular groove (1b). 3. The connection structure between the valve body and the joint in the heating valve according to claim 1 or 2, characterized in that, there is a set between the outer side of the inner end of the joint (2) and the inner side of the above-mentioned annular groove (1b). The second sealing structure that makes the connection and sealing of the two, the second sealing structure includes the second O-ring (4) and the second groove (2c) at the inner end of the joint (2), the O-ring two (4 ) is located in the second groove (2c) and its inner peripheral surface abuts against the inner wall of the annular groove (1b). 4. The connection structure between the valve body and the joint in the heating valve according to claim 3, characterized in that, the end of the above-mentioned annular shoulder (2d) close to the valve body (1) has a joint between the annular shoulder (2d) and A gasket (5) that seals the valve bodies (1) when they abut against each other. 5. The connection structure between the valve body and the joint in the heating valve according to claim 4, characterized in that the sum of the thickness of the gasket (5) and the depth of the annular groove (1b) is greater than the joint (2 ) inner end length. 6. The connection structure between the valve body and the joint in the heating valve according to claim 5, characterized in that the thickness of the inner end of the joint (2) is equal to the width of the annular groove (1b). 7. The connection structure between the valve body and the joint in the heating valve according to claim 6, characterized in that, the outer wall of the inner end of the joint (2) also has an inwardly inclined tapered guide surface (2a) , and the tapered guide surface one (2a) extends to the inner end of the joint (2). 8. The connection structure between the valve body and the joint in the heating valve according to claim 7, characterized in that, the side wall in the above-mentioned annular groove (1b) used to cooperate with the inner side wall of the inner end of the joint (2) has a Inwardly inclined tapered guide surface two (1c), the tapered guide surface two (1c) extends to the end of the connecting end (1a). 9. The connection structure between the valve body and the joint in the heating valve according to claim 8, characterized in that, the joint (2) is made of PPR material.