Shock absorption multi-purpose valve with bypass port

Abstract

The utility model relates to the technical field of valves, and discloses a damping multipurpose valve with a bypass port, which comprises a valve body, a valve clack, a valve rod, a support and a guide sleeve, the valve clack, the valve rod, the support and the guide sleeve are arranged in the valve body, the support is arranged at the outlet end of the valve body, the center of the support is connected with the guide sleeve, the head end of the valve rod is fixedly connected with the valve clack, and a spring is sleeved on the valve rod. The tail end of the valve rod is slidably connected into the guide sleeve. A buffer chamber is arranged at the rear end of the guide sleeve, the circumferential size of the buffer chamber is larger than the outer diameter of the valve rod, a center flow channel with the two ends closed is formed in the valve rod, a hole A communicating with the center flow channel and a valve body flow channel is formed in the side wall of the head end of the valve rod, and a hole set B communicating with the center flow channel is formed in the side wall of the tail end of the valve rod and comprises a plurality of small holes distributed in the axial direction of the valve rod. When the valve is opened, the hole group B is communicated with the buffer chamber; a bypass opening is formed in the side wall of the inlet end of the valve body. The utility model has the functions of non-return, noise and vibration elimination and the like; a bypass port of the valve can be connected into a bypass adjusting pipeline so as to achieve flow adjustment in the valve.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a vibration-absorbing multi-purpose valve provided with a bypass port. Background Art

[0002] A check valve is a valve whose opening and closing part is a circular disc and which blocks the backflow of the medium by its own weight and the pressure of the medium. The disc of the check valve is automatically opened or closed according to the flow condition of the medium in the pipeline (the pressure difference between the inlet and outlet of the valve). When the pressure at the inlet is greater than the sum of the pressure at the outlet and the spring force, the disc opens; when the sum of the pressure at the outlet and the spring force is greater than the pressure difference at the inlet, the disc closes and remains in the closed state. As long as there is a pressure difference, the disc remains in the open state, but the degree of opening is determined by the size of the pressure difference.

[0003] Based on the working principle of the check valve, flow fluctuations (pulsating flow) can cause frequent movement of the valve disc (the valve disc tends to open when the flow is large, and the valve disc tends to close when the flow is small), thereby generating noise and vibration. Utility Model Content

[0004] In order to solve the deficiencies in the above-mentioned prior art, the utility model provides a vibration-damping multi-purpose valve with a bypass port, which is installed in the outlet pipeline of a reciprocating compressor and has a check function and is good in eliminating noise and vibration. The valve has its own bypass port and can be connected to the system bypass circuit for flow regulation.

[0005] In order to achieve the above technical purpose, the technical solution adopted by the utility model is:

[0006] A vibration-damping multi-purpose valve with a bypass port comprises a valve body and a valve disc, a valve stem, a bracket and a guide sleeve arranged in the valve body, the bracket being arranged at the outlet end of the valve body, the center of the bracket being connected to the guide sleeve, the head end of the valve stem being fixedly connected to the valve disc, a spring being sleeved on the valve stem, and the end of the valve stem being slidably connected in the guide sleeve; a buffer chamber being arranged at the rear end of the guide sleeve, the circumferential dimension of the buffer chamber being larger than the outer diameter of the valve stem, a central flow channel closed at both ends being provided in the valve stem, a hole A connecting the central flow channel with the valve body flow channel being provided on the side wall of the valve stem head end, a hole group B connecting with the central flow channel being provided on the side wall of the valve stem end end, the hole group B comprising a plurality of small holes distributed along the axial direction of the valve stem, and the hole group B being connected with the buffer chamber when the valve is opened; a bypass port being arranged on the side wall of the inlet end of the valve body, the bypass port being located at the front end of the valve disc, and the bypass port being connected with the valve body channel.

[0007] Furthermore, a sealing pair is provided between the valve disc and the valve body, the sealing pair includes an end face seal, a stepped accommodating cavity matching the valve disc is provided in the valve body, and the end face seal is composed of the end face of the valve disc and the end face of the stepped accommodating cavity of the valve body.

[0008] Furthermore, the sealing pair also includes an axial seal, the side wall of the stepped accommodating cavity is inlaid with a non-metallic seal, and the axial seal is composed of the non-metallic seal and the periphery of the valve disc.

[0009] Preferably, the non-metallic sealing member is an O-ring.

[0010] Furthermore, a shaft shoulder is provided on the outer periphery of the middle part of the guide sleeve, an outer thread is provided on the outer periphery of the front end of the guide sleeve, and the guide sleeve is fixed by a nut after passing through the bracket from back to front.

[0011] The beneficial effects of the utility model are:

[0012] The utility model discloses a vibration-damping multi-purpose valve with a bypass port, which has a check function, and a central channel in the valve stem is connected with a valve body channel and a buffer chamber through a hole A and a hole group B, so that the valve disc has different movement speeds during opening and closing, thereby avoiding frequent opening and closing and eliminating noise and vibration; the valve has a bypass port that can be connected to a bypass regulating pipeline to achieve flow regulation in the valve, simplify the system and reduce equipment costs.

[0013] The vibration-absorbing multi-purpose valve with a bypass port of the utility model is provided with an end face seal and an axial seal. Regardless of the high or low pressure of the medium, the sealing structure can realize reliable sealing and achieve the function of reverse pressure maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the utility model (valve closed state);

[0016] Figure 2 It is a structural schematic diagram of an embodiment of the utility model (valve open state);

[0017] Figure 3 yes Figure 1 Enlarged schematic diagram of the dotted box A in the middle.

[0018] Figure numerals: 1-valve body, 2-valve disc, 3-valve stem, 4-spring, 5-nut, 6-bracket, 7-guide sleeve, 8-non-metallic seal, 9-buffer chamber, 10-valve body flow channel, 11-bypass port, 12-end face seal, 13-axial seal, 31-center flow channel, 32-hole A, 33-hole group B. DETAILED DESCRIPTION

[0019] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians of the art without making creative work are within the scope of protection of the present application.

[0020] A vibration-absorbing multi-purpose valve with a bypass port, such as Figure 1 , Figure 2 As shown, it includes a valve body 1 and a valve disc 2, a valve stem 3, a bracket 6, and a guide sleeve 7 arranged in the valve body 1, the bracket 6 is arranged at the outlet end of the valve body 1, the center of the bracket 6 is connected to the guide sleeve 7, the head end of the valve stem 3 is fixedly connected to the valve disc 2, a spring 4 is sleeved on the valve stem 3, the end of the valve stem 3 is slidably connected in the guide sleeve 7, a buffer chamber 9 is provided at the end of the guide sleeve 7, and the circumferential dimension of the buffer chamber 9 is larger than the outer diameter of the valve stem 3; a central flow channel 31 closed at both ends is opened in the valve stem 3, a hole A32 connecting the central flow channel 31 with the valve body flow channel 10 is opened on the side wall of the head end of the valve stem 3, and a hole group B33 connected to the central flow channel 31 is opened on the side wall of the end of the valve stem 3, and the hole group B33 includes a plurality of small holes distributed along the axial direction of the valve stem 3. When the valve is opened, the hole group B33 is connected to the buffer chamber 9. A bypass port 11 is provided on the side wall of the inlet end of the valve body 1. The bypass port 11 is located at the front end of the valve disc 2. The bypass port 11 is communicated with the valve body channel and is used to connect to the bypass regulating pipeline to regulate the flow in the valve body.

[0021] Furthermore, a sealing pair is provided between the valve flap 2 and the valve body 1, such as Figure 3 As shown, the sealing pair includes an end face seal 12, and a stepped accommodating cavity matching the valve disc 2 is provided in the valve body 1. The end face seal 12 is composed of the end face of the valve disc 2 and the end face of the stepped accommodating cavity of the valve body 1, and the material is metal / metal; the sealing pair also includes an axial seal 13, and the side wall of the stepped accommodating cavity is inlaid with a non-metallic seal 8, and the axial seal 13 is composed of the non-metallic seal and the outer periphery of the valve disc 2, and the material is non-metal / metal; preferably, the non-metallic seal 8 is an O-ring.

[0022] Furthermore, a shaft shoulder is provided on the outer periphery of the middle portion of the guide sleeve 7 , and an external thread is provided on the outer periphery of the front end of the guide sleeve 7 . The guide sleeve 7 passes through the bracket 6 from back to front and is tightened and fixed by the nut 5 .

[0023] The utility model provides a vibration-damping multi-purpose valve with a bypass port, wherein the valve flap 2 can move left and right in the guide sleeve 7; when the medium enters the inlet end of the valve, the valve flap 2 moves to the right under the action of the pressure to overcome the spring force, and the valve opens; when there is no medium pressure at the inlet end, the valve flap 2 moves to the left under the action of the pressure behind the valve and the spring force, and the valve closes; the valve has a check function.

[0024] When the valve disc 2 is opened, the medium in the buffer chamber 9 flows to the valve body flow channel 10 through the hole group B33, the central channel 31 and the hole A32 on the valve stem 3. During the opening process, the hole group B33 is gradually connected, the flow area is gradually increased, the flow rate is increased, the resistance of the valve stem 3 from the medium in the buffer chamber 9 is reduced, and the opening speed of the valve disc 2 is gradually increased; when the valve disc 2 begins to close, the medium in the valve body flow channel 10 flows to the buffer chamber 9 through the hole A32, the central channel 31 and the hole group B33 on the valve stem 3. During the closing process, the hole group B33 is gradually closed, the flow area is gradually reduced, the flow rate is reduced, and the closing speed of the valve disc 2 is gradually reduced; the fluctuation of the flow rate (pulsating flow) can cause the valve disc 2 to move frequently (opening and closing), thereby generating noise and vibration; when the valve is used in a pulsating flow condition (such as a compressor outlet pipeline), the movement speed of the valve disc of the valve is different during opening and closing and during the process, which avoids frequent opening and closing and eliminates noise and vibration. The size, number, arrangement spacing or arrangement method of the small holes in hole group B can be appropriately adjusted to adapt to different working conditions.

[0025] In general, the valve flap of the check valve is automatically opened or closed according to the flow conditions of the medium in the pipeline; when the valve flap is closed, it is only affected by the medium pressure, and there is no external coercive force; when the medium pressure is relatively low, the valve flap may be displaced and leak, so it is impossible to achieve the function of maintaining pressure. The vibration-damping multi-purpose valve of the utility model is provided with a double sealing pair, and the sealing pair can achieve reliable sealing regardless of the high or low medium pressure; when the valve flap 2 is in the closed position, the non-metallic sealing member 8 is compressed and deformed, and at the same time, it will give the valve flap 2 a reaction force, which is equivalent to the valve flap 2 being subjected to an external coercive force; under the action of the medium pressure and the deformation pressure of the non-metallic sealing member 8, the valve flap 2 will remain stable in the closed position, thereby ensuring reliable sealing and achieving the function of reverse pressure maintenance.

[0026] The vibration-absorbing multi-purpose valve of the utility model is also provided with a bypass port 11, which can be connected to a bypass regulating pipeline to achieve flow regulation in the valve, simplify the system and reduce equipment costs.

[0027] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A vibration-damping multi-purpose valve with a bypass port, comprising a valve body (1), a valve flap (2) arranged in the valve body (1), a valve stem (3), a bracket (6), and a guide sleeve (7), wherein the bracket (6) is arranged at the outlet end of the valve body (1), the center of the bracket (6) is connected to the guide sleeve (7), the head end of the valve stem (3) is fixedly connected to the valve flap (2), a spring (4) is sleeved on the valve stem (3), and the end of the valve stem (3) is slidably connected in the guide sleeve (7); characterized in that: A buffer chamber (9) is provided at the rear end of the guide sleeve (7). The circumferential dimension of the buffer chamber (9) is larger than the outer diameter of the valve stem (3). A central flow channel (31) with two closed ends is provided in the valve stem (3). A hole A (32) connecting the central flow channel (31) and the valve body flow channel (10) is provided on the side wall of the head end of the valve stem (3). A hole group B (33) connected to the central flow channel (31) is provided on the side wall of the end of the valve stem (3). The hole group B (33) includes a plurality of small holes distributed along the axial direction of the valve stem (3). When the valve is opened, the hole group B (33) is connected to the buffer chamber (9). A bypass port (11) is provided on the side wall of the inlet end of the valve body (1). The bypass port (11) is located at the front end of the valve disc (2). The bypass port (11) is connected to the valve body channel.

2. The vibration-absorbing multi-purpose valve with a bypass port according to claim 1, characterized in that: A sealing pair is provided between the valve flap (2) and the valve body (1), the sealing pair comprising an end face seal, a stepped accommodation cavity matching the valve flap (2) is provided in the valve body (1), and the end face seal is formed by the end face of the valve flap (2) and the end face of the stepped accommodation cavity of the valve body (1).

3. The vibration-absorbing multi-purpose valve with a bypass port according to claim 2, characterized in that: The sealing pair also includes an axial seal, the side wall of the stepped accommodating cavity is inlaid with a non-metallic seal (8), and the axial seal is composed of the non-metallic seal (8) and the outer periphery of the valve disc (2).

4. The vibration-absorbing multi-purpose valve with a bypass port according to claim 3, characterized in that: The non-metallic sealing component (8) is an O-shaped sealing ring.

5. The vibration-absorbing multi-purpose valve with a bypass port according to claim 1, characterized in that: The guide sleeve (7) is provided with a shaft shoulder on the outer periphery of the middle part, and an external thread is provided on the outer periphery of the front end of the guide sleeve (7). The guide sleeve (7) passes through the bracket (6) from back to front and is fixed by a nut (5).

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