An intake and exhaust combination valve

Abstract

This utility model relates to the technical field of air valves, and more particularly to an intake and exhaust combination valve; comprising: a valve body, the valve body including an intake port and an exhaust port; an intake valve cover including an intake channel communicating with the intake port; an intake valve plate disposed between the intake channel and the intake port, and connected to the intake valve cover by an elastic member; an exhaust valve cover including an exhaust channel communicating with the exhaust port; an exhaust valve plate disposed between the exhaust channel and the exhaust port, and connected to the exhaust valve cover by an elastic member; wherein, the exhaust valve cover, valve body, and intake valve cover are arranged from top to bottom and connected by a connecting rod; this utility model achieves a smaller volume, the exhaust valve cover, valve body, and intake valve cover are stacked from top to bottom, and the connecting rod is integrated to reduce volume; the valve cover is provided with a spring cavity for positioning, the airflow is directly connected, and the valve plate is opened and closed by differential pressure, solving the problems of traditional valves and adapting to compact compressors.

Description

Technical Field

[0001] This utility model relates to the technical field of air valves, and in particular to an intake and exhaust combination valve. Background Technology

[0002] The combined intake and exhaust valves have significant structural limitations: First, traditional products often use separate intake and exhaust valves, requiring independent installation space, resulting in a large overall size. Furthermore, the dispersed connection of multiple components makes assembly deviations easy, affecting the compact design of the compressor. Second, the airflow channel design is unreasonable; the intake and exhaust channels are often single straight lines, easily generating strong impacts during gas opening and closing, which not only exacerbates valve vibration but may also cause fluid interference due to the chaotic channel layout. Third, the installation structure of sealing and elastic components is loose; springs are often directly exposed, lacking dedicated installation and positioning structures, easily leading to stiffness imbalances. The fit between the valve plate and valve seat depends on overall assembly precision, and sealing reliability is prone to decline after long-term use. Fourth, the connection methods of each component are complex, often fixed separately with multiple sets of bolts, making disassembly and assembly inconvenient and resulting in poor overall structural stability, making it difficult to adapt to compressor scenarios with high requirements for space and structural regularity.

[0003] Therefore, developing a smaller and simpler intake and exhaust combination valve is of great practical significance. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned technical problems by providing a smaller and simpler intake and exhaust combination valve.

[0005] In view of this, the present invention provides an intake and exhaust combination valve, comprising:

[0006] The valve body includes an air inlet and an air outlet;

[0007] The intake valve cover includes an intake passage that communicates with the intake port.

[0008] An intake valve plate is provided between the intake channel and the intake port, and is connected to the intake valve cover by an elastic member;

[0009] The vent valve cover includes a vent passage that is connected to a vent hole.

[0010] An exhaust valve plate is provided between an exhaust channel and an exhaust hole, and is connected to the exhaust valve cover by an elastic member;

[0011] The exhaust valve cover, valve body, and intake valve cover are arranged from top to bottom and connected by a connecting rod.

[0012] Furthermore, the connecting rod has external threads at both ends. The upper end is connected to the exhaust valve cover by a nut, and the lower end is threaded to the intake valve cover. The connecting rod is fixed to the position of the intake valve cover by a pin.

[0013] Furthermore, the air intake port is located on the side wall of the valve body.

[0014] Furthermore, it also includes:

[0015] Two pins, one end of which is interference-fitted into the intake valve cover, and the other end is inserted into the valve seat.

[0016] Furthermore, a guide groove is provided on the valve seat directly opposite the air intake or air outlet passage.

[0017] Furthermore, at least one intake passage and one exhaust passage are provided.

[0018] At least one air intake channel and one air outlet channel are provided. The beneficial effects of this invention are:

[0019] 1. This utility model achieves a smaller volume, with the outlet valve cover, valve body, and inlet valve cover stacked from top to bottom, and the connecting rod integrated to reduce volume; the valve cover is equipped with a spring cavity for positioning, direct airflow connection, and valve plate differential pressure opening and closing, solving traditional problems and adapting to compact compressors.

[0020] 2. This utility model uses threaded connections at both ends of the connecting rod, with a nut at the upper end and a pin at the lower end to form a double fixation, preventing loosening due to airflow impact and vibration. Maintenance requires no damage, the clearance is adjustable, and it also ensures axis alignment, reduces wear and noise, disperses stress, saves space, and is suitable for compact compressors. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a structural schematic diagram showing a partial cross-sectional view of the present invention.

[0023] The markings in the diagram are as follows:

[0024] 1. Valve body; 2. Air inlet; 3. Air outlet; 4. Air inlet valve cover; 401. Air inlet passage; 402. Air inlet valve plate; 5. Air outlet valve cover; 501. Air outlet passage; 502. Air outlet valve plate; 6. Connecting rod; 7. Pin 1; 8. Pin 2; 9. Guide groove; 10. Mounting cavity; 11. Air outlet passage. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0026] Example 1:

[0027] This embodiment provides an intake and exhaust combination valve, including:

[0028] Valve body 1, which includes an air inlet 2 and an exhaust port 3;

[0029] The intake valve cover 4 includes an intake passage 401, which is connected to the intake port 2.

[0030] The intake valve plate 402 is located between the intake passage 401 and the intake port 2, and is connected to the intake valve cover 4 by an elastic member.

[0031] The air outlet valve cover 5 includes an air outlet channel 501, which is connected to the air outlet hole;

[0032] The air outlet valve plate 502 is provided between the air outlet channel 501 and the air outlet hole, and is connected to the air outlet valve cover 5 by an elastic member;

[0033] Among them, the exhaust valve cover 5, valve body 1 and intake valve cover 4 are arranged from top to bottom and connected by connecting rod 6.

[0034] The valve body 1 includes an air inlet 2 and an air outlet 3. An air inlet valve cover 4 is located below the valve body 1 and is also provided with an air outlet channel 11. The air outlet channel 11 is connected to the air outlet channel 501. The elastic component is a spring. The valve cover is provided with a mounting cavity 10 for installing the spring, and the spring is connected to the mounting cavity by fasteners. The spring is not shown. An air inlet valve plate 402 covers one end of the air inlet 2 of the valve body 1. The air inlet 2 is blocked by the cooperation of the air inlet valve plate 402 and the spring. The valve body 1 is automatically opened and closed by pressure difference. Similarly, an air outlet valve plate 502 covers the air outlet. The air outlet valve cover 5, the valve body 1 and the air inlet valve cover 4 are arranged from top to bottom by a stacked structure, and the three are fixedly connected by a connecting rod 6 to realize a small-volume combination valve with a regular structure.

[0035] The exhaust valve cover 5, valve body 1, and intake valve cover 4 are arranged in a top-to-bottom stacked layout, and are rigidly connected as a whole by a connecting rod 6, which greatly reduces the overall volume of the combined valve while ensuring structural regularity. A dedicated spring mounting cavity is set in the valve cover, and the spring is precisely positioned with fasteners to prevent spring displacement. The intake channel 401 is directly connected to the intake port 2, and the exhaust channel 501 is connected to the exhaust port. The intake valve plate 402 and the exhaust valve plate 502 cover the intake port 2 and the exhaust port respectively, and automatic opening and closing is achieved by pressure difference. This not only optimizes the airflow path but also simplifies the sealing structure, effectively solving the problems of large size, loose structure, and large airflow impact of the traditional combined valve body 1, and adapting to the use requirements of compact compressors.

[0036] Example 2:

[0037] This embodiment provides an intake and exhaust combination valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0038] The connecting rod 6 has external threads at both ends. The upper end is connected to the air outlet valve cover 5 by a nut, and the lower end is connected to the air inlet valve cover 4 by a thread. The connecting rod 6 and the air inlet valve cover 4 are fixed in position by a pin 7.

[0039] The connecting rod 6 is threaded at both ends to the outlet valve cover 5 (locked by a nut at the top) and the inlet valve cover 4 (threaded at the bottom) respectively. Additionally, the lower end is mechanically locked by a pin 7, forming a double-fixing structure of "thread pre-tightening + pin anti-slip". Compared to a single threaded connection, this effectively prevents the connecting rod 6 from loosening due to long-term airflow impact and vibration (such as valve plate impact vibration) of the combined valve. It ensures the stable stacked arrangement of the outlet valve cover 5, valve body 1, and inlet valve cover 4, preventing valve plate sealing failure and airflow leakage caused by component misalignment.

[0040] The upper end uses a "threaded + nut" connection, and the lower end uses a "threaded + detachable pin 7". The overall connection structure does not require destructive disassembly: during maintenance, only the upper nut needs to be removed and the lower pin 7 needs to be pulled out, and the connecting rod 6 can be unscrewed to separate the three parts, avoiding the problem of having to replace the whole unit when using traditional welding or integrated connections; and the threaded connection can flexibly adjust the assembly gap, making it easy to calibrate the position of the parts during reassembly and shortening maintenance time.

[0041] The lower pin 7 can restrict the relative rotation between the connecting rod 6 and the intake valve cover 4. Combined with the helical positioning effect of the threads at both ends, it can ensure that the superimposed axes of the exhaust valve cover 5, valve body 1, and intake valve cover 4 are consistent from top to bottom. This avoids misalignment of the intake valve plate 402, exhaust valve plate 502 and valve seat (intake hole 2, exhaust hole 3) due to assembly misalignment. This reduces local wear of the valve plate and gas leakage. At the same time, it ensures smooth connection of the airflow channel (intake channel 401 - intake hole 2, exhaust channel - exhaust hole 3) and avoids airflow impact noise caused by channel misalignment.

[0042] The connecting rod 6 transmits the clamping force of the air valve cover 5 and the air inlet valve cover 4 evenly through the thread, so that the valve body 1 is stably clamped in the middle layer. The pin 7 can disperse the shear stress at the lower end of the connecting rod 6 (avoiding a single thread bearing all the radial force), reducing the risk of breakage of the connecting rod 6 due to local stress concentration. At the same time, the balanced clamping force can ensure that the sealing surfaces of the valve body 1 and the upper and lower valve covers fit tightly, further improving the high-pressure sealing reliability of the combined valve.

[0043] The connecting rod 6 adopts a simple structure of "threaded ends + pin", eliminating the need for additional brackets, flanges and other redundant components. It can closely fit the stacked layout of the exhaust valve cover 5 - valve body 1 - intake valve cover 4, avoiding excessive space occupation due to the connection structure. Compared with the traditional multi-bolt scattered connection, the overall axial dimension is shortened, further supporting the design goal of "small volume and regular structure" of the combination valve, and adapting to the installation requirements of compact balanced compressors.

[0044] The air inlet 2 is located on the side wall of the valve body 1.

[0045] Shorten the air intake path and keep it away from the air outlet to avoid airflow interference.

[0046] Also includes:

[0047] Two pins, pin 28, one end of pin 28 is interference-fitted inside the intake valve cover 4, and the other end is inserted into the valve seat.

[0048] The two pins 8 employ a dual positioning structure: one end is an interference fit with the intake valve cover 4, and the other end is inserted into the valve body 1. The interference fit ensures that there is no relative displacement between the pin and the intake valve cover 4, while the insertion into the valve body 1 restricts radial misalignment between the two, forming a positioning mechanism of "rigid constraint + precise guidance". Compared to single pin positioning, the double pins ensure that the sealing surface of the intake valve plate 402 is completely aligned with the sealing surface of the intake port 2.

[0049] A guide groove 9 is provided on the valve seat directly opposite the air intake channel 401 or the air outlet channel 501.

[0050] A guide groove 9 is provided on the valve body 1 directly opposite the inlet / outlet channel 501, which can form a "pre-guide" for the gas entering the channel. Function: When the gas passes through the guide groove 9, it flows along a preset path, and the flow velocity distribution is more uniform, avoiding direct impact on the edge of the valve plate; at the same time, the guide groove 9 can buffer the pressure fluctuation at the moment of opening and closing of the airflow, reduce the high-frequency vibration and fatigue damage of the valve plate, and extend the valve plate life; in addition, the guide groove 9 can guide the airflow to fill or discharge quickly, shorten the opening and closing response time, and optimize the volumetric efficiency of the compressor.

[0051] At least one air intake passage 401 and one air outlet passage 501 are provided.

[0052] At least one intake channel 401 and one outlet channel 501 are provided (the number can be expanded according to needs), enabling the combined valve to flexibly adapt to different flow conditions: a single channel can meet low flow scenarios, while multiple channels (such as 2-4) can increase the total flow through parallel flow distribution. Different compressor models can be adapted by increasing or decreasing the number of channels without changing the overall structural framework, enhancing versatility and reducing customized production costs.

[0053] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms fall within the scope of protection of this application.

Claims

1. An intake and exhaust combination valve, characterized in that, include: Valve body (1), which includes an air inlet (2) and an exhaust port (3); The intake valve cover (4) includes an intake passage (401) which is connected to the intake port (2); An intake valve plate (402) is provided between an intake passage (401) and an intake hole (2), and is connected to the intake valve cover (4) by an elastic member; The vent valve cover (5) includes an vent passage (501) that is connected to the vent hole; The air outlet valve plate (502) is provided between the air outlet channel (501) and the air outlet hole, and is connected to the air outlet valve cover (5) by an elastic member; Among them, the exhaust valve cover (5), valve body (1) and intake valve cover (4) are arranged from top to bottom and connected by connecting rod (6).

2. The intake and exhaust combination valve according to claim 1, characterized in that, The connecting rod (6) has external threads at both ends. The upper end is connected to the air outlet valve cover (5) by a nut, and the lower end is connected to the air inlet valve cover (4) by a thread. The connecting rod (6) and the air inlet valve cover (4) are fixed by a pin (7).

3. The intake and exhaust combination valve according to claim 1, characterized in that, The air inlet (2) is located on the side wall of the valve body (1).

4. The intake and exhaust combination valve according to claim 1, characterized in that, Also includes: Two pins (8) are arranged with one end of the pin being interference-fitted inside the intake valve cover (4) and the other end being inserted into the valve seat.

5. The intake and exhaust combination valve according to claim 1, characterized in that, A guide groove (9) is provided on the valve seat opposite the air intake passage (401) or the air outlet passage (501).

6. The intake and exhaust combination valve according to claim 1, characterized in that, The intake passage (401) and the exhaust passage (501) are provided with at least one.

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