Novel mute check valve

Abstract

The utility model provides a novel mute check valve. The novel mute check valve comprises a valve rod, a valve clack and a valve body, wherein a support thread and a valve seat thread are arranged at the inlet end of the valve body; the support is connected with the valve body through support threads; the valve seat is connected with the valve body through valve seat threads, a first sealing groove is additionally formed in the contact end of the valve seat and the valve body, and the other end of the valve seat is machined into a sealing face. The sealing ring is installed on the first sealing groove, and the sealing ring and the valve body are sealed to form sealing. The novel mute check valve has the advantages of being simple in structure and capable of avoiding the problems that the valve clack is too heavy, the valve rod is stuck and deviated in the using process, and the valve cannot be vertically installed.

Description

Technical Field

[0001] The utility model belongs to the technical field of drainage, and in particular relates to a novel silent check valve. Background Art

[0002] Silent check valves are mainly installed at the pump outlets of water supply and drainage, fire protection, and HVAC systems to prevent medium backflow and eliminate water hammer, effectively protecting the safety of pipelines and pumps. The valve has a streamlined design with low flow resistance, reasonable structure, good sealing performance, and no water hammer sound. The valve also has the characteristics of short structure and light weight.

[0003] With the development of the market, there are more and more large-diameter valves. Because the valve disc is too heavy, problems such as valve stem jamming, deviation, and inability to install vertically often occur during use.

[0004] Therefore, it is necessary to provide a new silent check valve to solve the above technical problems. Utility Model Content

[0005] The technical problem solved by the utility model is to provide a new silent check valve with a simple structure, which can avoid the problems of the valve disc being too heavy, the valve stem being stuck and deviating, and the valve being unable to be installed vertically during use.

[0006] In order to solve the above technical problems, the utility model provides a new silent check valve comprising: a valve stem, a valve disc and a valve body, wherein the inlet end of the valve body is provided with a support thread and a valve seat thread;

[0007] A bracket, wherein the bracket is connected to the valve body through a bracket thread;

[0008] A valve seat, wherein the valve seat is connected to the valve body via a valve seat thread, a sealing groove is added to the contact end between the valve seat and the valve body, and the other end of the valve seat is processed into a sealing surface;

[0009] A sealing ring is installed on the sealing groove 1, and the sealing ring and the valve body seal form a seal.

[0010] As a further solution of the utility model, the surface of the valve disc is processed into a second sealing groove, the second sealing groove is provided with a vulcanized rubber coating, a threaded hole is opened in the center of the valve disc, one end of the valve stem is provided with a thread, and the threaded end on the valve stem is connected to the valve disc through the threaded hole.

[0011] As a further solution of the utility model, an O-ring 1 is provided between the valve stem and the valve disc, and the valve stem and the valve disc form a convex seal through the O-ring 1 and the vulcanized rubber coating on the valve disc.

[0012] As a further solution of the utility model, a center hole is opened on the bracket, the valve stem passes through the center hole on the bracket, a bracket sleeve is installed between the bracket and the valve stem, and the bracket sleeve is fixed by a pressure cover and bolts.

[0013] As a further solution of the utility model, a spring is sleeved on the other end of the valve stem, and the spring is connected with the guide body through the guide body.

[0014] As a further solution of the utility model, the flow guide is sealed by an O-ring, and the flow guide is threadedly connected to the outlet diameter end of the valve body.

[0015] Compared with the related art, the new silent check valve provided by the utility model has the following advantages:

[0016] Beneficial effects:

[0017] 1. The utility model has a simple structure and can avoid the valve disc being too heavy, which often causes the valve stem to get stuck, deviate, and the valve cannot be installed vertically during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0021] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of part B;

[0022] Figure 4 for Figure 1 Schematic diagram of the enlarged structure of part C.

[0023] In the figure: 1. valve stem; 2. bracket; 3. valve disc; 4. sealing ring; 5. valve seat; 6. shaft sleeve; 7. guide body; 8. valve body; 9. bolt; 10. gland; 11. bracket shaft sleeve; 12. O-ring 1; 13. spring; 14. O-ring 2. DETAILED DESCRIPTION

[0024] Please refer to Figures 1 to 4 ,in, Figure 1 It is a schematic diagram of the structure of the utility model; Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A; Figure 3 for Figure 1 A schematic diagram of the enlarged structure of part B; Figure 4 for Figure 1 The enlarged structural diagram of the C part in the middle. The novel silent check valve comprises: a valve stem 1, a valve disc 3 and a valve body 8, wherein the inlet end of the valve body 8 is provided with a support thread and a valve seat thread;

[0025] A bracket 2, wherein the bracket 2 is connected to the valve body 8 via a bracket thread;

[0026] A valve seat 5, wherein the valve seat 5 is connected to the valve body 8 via a valve seat thread, a sealing groove 1 is added between the contact end of the valve seat 5 and the valve body 8, and the other end of the valve seat 5 is processed into a sealing surface;

[0027] The sealing ring 4 is installed on the sealing groove 1, and the sealing ring 4 and the valve body 8 are sealed to form a seal.

[0028] The surface of the valve disc 3 is processed into a sealing groove 2, and the sealing groove 2 is provided with a vulcanized rubber bag. A threaded hole is opened in the center of the valve disc 3, and one end of the valve stem 1 is provided with a thread. The threaded end on the valve stem 1 is connected to the valve disc 3 through the threaded hole.

[0029] An O-ring 12 is provided between the valve stem 1 and the valve disc 3 , and a convex seal is formed between the valve stem 1 and the valve disc 3 through the O-ring 12 and the vulcanized rubber coating on the valve disc 3 .

[0030] The bracket 2 is provided with a center hole, and the valve stem 1 passes through the center hole of the bracket 2 . A bracket sleeve 11 is installed between the bracket 2 and the valve stem 1 , and the bracket sleeve 11 is fixed by a gland 10 and bolts 9 .

[0031] The other end of the valve stem 1 is sleeved with a spring 13 , and the spring 13 is connected to the flow guide 7 through the flow guide 7 .

[0032] The flow guide 7 is sealed by an O-ring 14 , and the flow guide 7 and the outlet end of the valve body 8 are threadedly connected.

[0033] The valve stem 1 is positioned through the center hole of the bracket 2 and the center hole of the guide body 7, and is connected in the middle by the copper alloy bracket sleeve 11 and the sleeve 6 to ensure that when the valve disc 3 drives the valve stem 1 to move, the valve stem 1 is not eccentric and there is no jamming. At the same time, the valve can be installed horizontally or vertically.

[0034] A groove is machined in the center hole of the rubber-coated end of the valve disc 3 to increase the contact area between the rubber-coated end and the valve stem 1. The effect is as follows:

[0035] 1. Prevent the rubber from falling off;

[0036] 2. 2. Seal.

[0037] The valve body 8, the guide body 7 and the bracket are made of ductile iron, the valve stem 1, the spring 13 and the valve seat 5 are made of stainless steel, the bushing is made of copper alloy, the sealing ring 4 is made of NBR, and the valve disc 3 is made of ductile iron coated with NBR.

[0038] Open: After the water pump is started, the valve disc 3 is automatically pushed open by the medium pressure, and water flows through the valve.

[0039] Close: After the water pump stops, the valve disc 3 returns to the sealing ring 4 under the elastic action of the spring 13, and the valve is closed.

[0040] It should be noted that the equipment structure and drawings of the utility model mainly describe the principle of the utility model. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in this field understand the principle of the above utility model, the details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in this field;

[0041] The standard parts used therein can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the structures and principles of the components known to technical personnel in this field can be known by these technical personnel through technical manuals or through conventional experimental methods.

[0042] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations or direct or indirect applications may be made to these embodiments without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the attached claims and their equivalents, which are equally included in the scope of patent protection of the present invention.

Claims

1. A new type of silent check valve, characterized in that: include: A valve stem, a valve disc and a valve body, wherein the inlet end of the valve body is provided with a support thread and a valve seat thread; A bracket, wherein the bracket is connected to the valve body through a bracket thread; A valve seat, wherein the valve seat is connected to the valve body via a valve seat thread, a sealing groove is added to the contact end between the valve seat and the valve body, and the other end of the valve seat is processed into a sealing surface; A sealing ring is installed on the sealing groove 1, and the sealing ring and the valve body seal form a seal.

2. The novel silent check valve according to claim 1 is characterized in that: The surface of the valve disc is processed into a second sealing groove, and the second sealing groove is provided with a vulcanized rubber bag. A threaded hole is opened in the center of the valve disc, and one end of the valve stem is provided with a thread. The threaded end on the valve stem is connected to the valve disc through the threaded hole.

3. The novel silent check valve according to claim 2 is characterized in that: An O-ring 1 is arranged between the valve stem and the valve disc, and a convex point seal is formed between the valve stem and the valve disc through the O-ring 1 and the vulcanized rubber coating on the valve disc.

4. The novel silent check valve according to claim 1 is characterized in that: The bracket is provided with a center hole, the valve stem passes through the center hole of the bracket, a bracket sleeve is installed between the bracket and the valve stem, and the bracket sleeve is fixed by a gland and bolts.

5. The novel silent check valve according to claim 1 is characterized in that: The other end of the valve stem is sleeved with a spring, and the spring is connected with the guide body through the guide body.

6. The novel silent check valve according to claim 5 is characterized in that: The flow guide is sealed by an O-ring, and the flow guide is threadedly connected to the outlet end of the valve body.

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