Indoor and outdoor pressure difference control device for clean room

Abstract

The utility model discloses an indoor and outdoor pressure difference control device for a clean room, which comprises a main pipeline, the main pipeline is connected with a return pipe through two three-way pipes, one side of one three-way pipe is communicated with a throttle valve on the main pipeline, the main pipeline between the two three-way pipes is fixedly communicated with a check valve, and the two three-way pipes are fixedly communicated with the check valve. The main pipeline on one side of the other three-way pipe is communicated with a ball valve; the return pipe is communicated with a branch gate valve, and the return pipe on one side of the branch gate valve is fixedly communicated with a pressure detection valve. According to the indoor and outdoor pressure difference control device for the clean room, a pressure adjusting system can be effectively detected, so that the pressure is within a certain range, and switching adjustment is facilitated; in addition, the indoor and outdoor pressure difference control device for the clean room can detect backflow of pressure, the effective range of the pressure is kept, and system damage caused by backflow of the pressure can be prevented to a certain extent.

Description

Technical Field

[0001] The utility model relates to the field of clean rooms, and particularly to a differential pressure control device between the inside and outside of a clean room. Background Technique

[0002] The differential pressure of a clean room is the static pressure difference that must be maintained between the clean room and the surrounding space. Maintaining an appropriate pressure difference between the external environment of the factory building and the clean room, between clean rooms with different cleanliness levels, or between the clean room and ordinary rooms aims to ensure that the cleanliness of the clean room is not contaminated by adjacent rooms or does not contaminate adjacent rooms when the clean room is working normally or the air balance is temporarily disrupted. It is a relatively common situation for the clean room to maintain a positive static pressure difference with the adjacent room. In actual projects, industrial clean rooms and general biological clean rooms both maintain positive pressure. However, for clean rooms that use toxic or harmful gases, flammable and explosive solvents, or have high-dust operations, biological clean rooms that produce sensitizing drugs or highly active drugs, and other biological clean rooms with special requirements, a negative static pressure difference needs to be maintained.

[0003] Referring to the Chinese patent with the publication number CN109654602A, it discloses a differential pressure control system for a clean room, including a first air conditioning system and a clean room. The first air conditioning system is connected to the clean room through a first air supply branch pipe. The clean room is connected to the first air conditioning system through a first return air branch pipe, and the clean room is connected with a first exhaust branch pipe.

[0004] The above patent has some advantages, but there are still some disadvantages, such as: First, it is impossible to effectively detect the pressure regulation system to keep the pressure within a certain range for easy switching and adjustment; Second, it is impossible to detect the pressure reflux and keep the pressure within an effective range, and there is no check valve installed, which is likely to cause system damage due to pressure reflux. Content of the Utility Model

[0005] Aiming at the problems mentioned in the background technique, the purpose of the utility model is to provide a differential pressure control device between the inside and outside of a clean room to solve the problems mentioned in the background technique.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions:

[0007] A differential pressure control device between the inside and outside of a clean room includes a main pipeline. A return pipe is connected to the main pipeline through two three-way pipes. A throttle valve is connected to one side of the main pipeline of one of the three-way pipes. A check valve is fixedly connected to the main pipeline between the two three-way pipes. A ball valve is connected to one side of the main pipeline of the other three-way pipe. A shut-off valve is connected to the return pipe. A pressure detection valve is fixedly connected to the return pipe on one side of the shut-off valve.

[0008] By adopting the above technical solutions, the indoor and outdoor differential pressure control device of this clean room can effectively detect the pressure regulation system, enabling the pressure to be within a certain range for easy switching and adjustment; in addition, the indoor and outdoor differential pressure control device of this clean room can detect the pressure reflux and keep the pressure within an effective range, which can prevent system damage caused by pressure backflow to a certain extent; among them, the pressure can be detected through the setting of the reflux pipe, and the pressure inside the main pipe can be adjusted through the throttle valve, so as to realize the adjustment and switching of the indoor and outdoor differential pressure of the clean room, which is convenient for use and does not require multiple sets of pipes for pressure switching, reducing waste of resources; in addition, the check valve provided can prevent the air pressure in the main pipe from flowing back, effectively improving safety, and the pressure detection valve can detect the pressure in the reflux pipe, so as to detect the pressure in the main pipe.

[0009] Preferably, connecting flanges are respectively welded to the ends of the three-way pipe, and the connecting flanges are fixedly connected to the main pipe and the reflux pipe through fixing bolts.

[0010] By adopting the above technical solutions, the setting of the three-way pipe facilitates the connection between the main pipe and the reflux pipe, and the setting of the connecting flange and the fixing bolt facilitates stable sealed connection.

[0011] Preferably, the reflux pipe is connected in a reflux manner to both ends of the check valve through the three-way pipe.

[0012] By adopting the above technical solutions, the setting of the reflux pipe facilitates the adjustment of the pressure and can effectively detect the pressure for easy adjustment.

[0013] Preferably, a telescopic cylinder is fixedly installed inside one of the three-way pipes, a telescopic rod is movably connected inside the telescopic cylinder, a sealing plate is fixedly connected to the end of the telescopic rod, and a silicone sealing block is fixedly provided at the end of the sealing plate.

[0014] By adopting the above technical solutions, the setting of the telescopic cylinder and the telescopic rod facilitates telescopic adjustment, and the setting of the sealing plate and the silicone sealing block facilitates sealed connection.

[0015] Preferably, springs are sleeved outside the telescopic cylinder and the telescopic rod, and both ends of the springs are respectively fixedly installed at the ends of the three-way pipe and the sealing plate.

[0016] By adopting the above technical solutions, the setting of the springs facilitates elastic reset, and it is convenient for reset after being compressed by force.

[0017] Preferably, the tee pipe includes a horizontal pipe and a vertical pipe. A first groove is formed at the bottom end of the vertical pipe, and a second groove is formed at the upper end of the first groove.

[0018] By adopting the above technical solution, the setting of the first groove and the second groove facilitates snap connection and stably realizes sealed connection.

[0019] Preferably, the sealing plate is snap-connected inside the first groove, and an annular clamping block is fixedly arranged on the sealing plate, and the annular clamping block is snap-connected inside the second groove.

[0020] By adopting the above technical solution, the sealing plate is snap-connected inside the first groove, and the annular clamping block is snap-connected inside the second groove, effectively realizing sealed connection, preventing pressure leakage and causing failure to achieve sealing performance.

[0021] Preferably, the inner wall of the main pipe (1) is coated with an anti-fouling coating.

[0022] By adopting the above technical solution, the anti-fouling coating on the inner wall of the main pipe can, to a certain extent, slow down the fouling speed of the inner wall of the main pipe.

[0023] In summary, the present utility model mainly has the following beneficial effects:

[0024] The indoor and outdoor differential pressure control device of the present utility model can effectively detect the pressure regulation system, making the pressure within a certain range for easy switching and adjustment; in addition, the indoor and outdoor differential pressure control device of the present utility model can detect the pressure reflux and keep the pressure within an effective range, which can, to a certain extent, prevent system damage caused by pressure backflow; among them, the setting of the reflux pipe can detect the pressure, and the throttle valve is used to adjust the pressure inside the main pipe, thereby realizing the adjustment and switching of the indoor and outdoor differential pressure, which is convenient for use, does not require multiple sets of pipes for pressure switching, and reduces waste of resources; in addition, the check valve provided can prevent the air pressure in the main pipe from flowing back, effectively improving safety, and the pressure detection valve can detect the pressure in the reflux pipe, thereby detecting the pressure in the main pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the indoor and outdoor differential pressure control device of the present utility model;

[0026] Figure 2 is Figure 1 the sectional view at A in

[0027] Figure 3 is Figure 2 the enlarged view at B in

[0028] Reference numerals: 1, main pipeline; 2, return pipe; 3, throttle valve; 4, check valve; 5, ball valve; 6, sectional valve; 7, pressure detection valve; 8, tee; 801, horizontal pipeline; 802, vertical pipeline; 803, connecting flange; 804, fixing bolt; 9, telescopic cylinder; 10, telescopic rod; 11, spring; 12, sealing plate; 13, silicone sealing block; 14, first groove; 15, second groove; 16, annular clamping block. Specific embodiments

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment

[0031] Refer to Figures 1-3 , a differential pressure control device for indoor and outdoor cleanliness, comprising a main pipeline 1. A return pipe 2 is connected to the main pipeline 1 through two tees 8. One side of a tee 8 is communicated with a throttle valve 3 on the main pipeline 1. A check valve 4 is fixedly communicated with the main pipeline 1 between the two tees 8. One side of the other tee 8 on the main pipeline 1 is communicated with a ball valve 5; a sectional valve 6 is communicated with the return pipe 2. A pressure detection valve 7 is fixedly communicated with the return pipe 2 on one side of the sectional valve 6. The differential pressure control device for indoor and outdoor cleanliness of the present invention can effectively detect the pressure regulation system, so that the pressure is within a certain range, which is convenient for switching and regulation; in addition, the differential pressure control device for indoor and outdoor cleanliness of the present invention can detect the pressure return and keep the pressure within an effective range, which can prevent the system damage caused by pressure backflow to a certain extent; among them, the pressure can be detected through the setting of the return pipe 2, and the pressure inside the main pipeline 1 can be adjusted through the throttle valve 3, so as to realize the adjustment and switching of the differential pressure between indoor and outdoor cleanliness, which is convenient for use, and there is no need to use multiple groups of pipelines for pressure switching, reducing the waste of resources; in addition, the check valve 4 provided can prevent the air pressure in the main pipeline 1 from flowing back, effectively improving the safety, and the pressure detection valve 7 can detect the pressure in the return pipe 2, so as to detect the pressure in the main pipeline 1.

[0032] Refer to Figures 1-3, where connection flanges 803 are respectively welded to the end portions of the tee pipe 8, and the connection flanges 803 are fixedly communicated with the main pipe 1 and the return pipe 2 through fixing bolts 804. The setting of the tee pipe 8 facilitates the connection between the main pipe 1 and the return pipe 2, and the settings of the connection flanges 803 and the fixing bolts 804 facilitate stable sealed connection.

[0033] Reference Figures 1-3 , where the return pipe 2 is connected in a reflux manner to both ends of the check valve 4 through the tee pipe 8. The setting of the return pipe 2 facilitates the adjustment of pressure and can effectively detect the pressure for easy adjustment. A telescopic cylinder 9 is fixedly installed inside one of the tee pipes 8. A telescopic rod 10 is movably connected inside the telescopic cylinder 9. The end of the telescopic rod 10 is fixedly connected to a sealing plate 12. A silica gel sealing block 13 is fixedly provided at the end of the sealing plate 12. The settings of the telescopic cylinder 9 and the telescopic rod 10 facilitate telescopic adjustment, and the settings of the sealing plate 12 and the silica gel sealing block 13 facilitate sealed connection.

[0034] Reference Figures 1-3 , where a spring 11 is sleeved outside the telescopic cylinder 9 and the telescopic rod 10. The two ends of the spring 11 are respectively fixedly installed at the ends of the tee pipe 8 and the sealing plate 12. The setting of the spring 11 facilitates elastic reset. After being compressed by force, it is convenient for reset. The tee pipe 8 includes a horizontal pipe 801 and a vertical pipe 802. A first groove 14 is opened at the bottom end of the vertical pipe 802, and a second groove 15 is opened at the upper end of the first groove 14. The settings of the first groove 14 and the second groove 15 facilitate snap connection and stably achieve sealed connection.

[0035] Reference Figures 1-3 , where the sealing plate 12 is snap-connected inside the first groove 14. An annular snap block 16 is fixedly provided on the sealing plate 12, and the annular snap block 16 is snap-connected inside the second groove 15. The sealing plate 12 is snap-connected inside the first groove 14, and the annular snap block 16 is snap-connected inside the second groove 15, effectively achieving sealed connection and preventing pressure leakage, resulting in the inability to achieve sealing performance. A layer of anti-fouling coating is applied to the inner wall of the main pipe 11. The anti-fouling coating on the inner wall 1 of the main pipe 1 can slow down the fouling speed of the inner wall of the main pipe 1 to a certain extent.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A differential pressure control device for clean rooms, comprising a main pipeline (1), characterized in that: A return pipe (2) is connected to the main pipe (1) through two three-way pipes (8). A throttle valve (3) is connected to one side of the main pipe (1) on one of the three-way pipes (8). A check valve (4) is fixedly connected to the main pipe (1) between the two three-way pipes (8). A ball valve (5) is connected to the main pipe (1) on one side of the other three-way pipe (8). A shut-off valve (6) is connected to the return pipe (2). A pressure detection valve (7) is fixedly connected to the return pipe (2) on one side of the shut-off valve (6).

2. The differential pressure control device between the inside and outside of the clean room according to claim 1, wherein: Connection flanges (803) are welded to the ends of the three-way pipe (8) respectively, and the connection flanges (803) are fixedly connected to the main pipe (1) and the return pipe (2) through fixing bolts (804).

3. The differential pressure control device between the inside and outside of the clean room according to claim 1, characterized in that: The return pipe (2) is connected in a return manner to both ends of the check valve (4) through the three-way pipe (8).

4. The clean room internal and external differential pressure control device according to claim 1, wherein: A telescopic cylinder (9) is fixedly installed inside one of the three-way pipes (8). A telescopic rod (10) is movably connected inside the telescopic cylinder (9). The end of the telescopic rod (10) is fixedly connected to a sealing plate (12), and a silica gel sealing block (13) is fixedly provided at the end of the sealing plate (12).

5. The clean room internal and external differential pressure control device according to claim 4, characterized in that: A spring (11) is sleeved outside the telescopic cylinder (9) and the telescopic rod (10), and both ends of the spring (11) are fixedly installed at the ends of the three-way pipe (8) and the sealing plate (12) respectively.

6. The clean room internal and external differential pressure control device according to claim 5, characterized in that: The three-way pipe (8) includes a horizontal pipe (801) and a vertical pipe (802). A first groove (14) is opened at the bottom end of the vertical pipe (802), and a second groove (15) is opened at the upper end of the first groove (14).

7. The clean room internal and external differential pressure control device according to claim 6, characterized in that: The sealing plate (12) is snap-fitted inside the first groove (14), and an annular snap block (16) is fixedly provided on the sealing plate (12), and the annular snap block (16) is snap-fitted inside the second groove (15).

8. The differential pressure control device between the inside and outside of the clean room according to claim 1, wherein: The inner wall of the main pipe (1) is coated with an anti-fouling coating.

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